HVAC Monitoring System

Abstract

An HVAC monitoring system that tests for an abnormal environmental condition, wherein the abnormal condition results in effectuating a selected response from an HVAC building system, the HVAC monitoring system utilizing an existing sensor for detecting the gas abnormal condition, wherein a first event marker signal is generated from the existing sensor detecting the abnormal condition. Further included is an audio sensor, a wireless transmitter, a wireless receiver, programable control circuitry, a switching transistor, a relay, and a power supply for all the previous elements, wherein these components utilize the first event marker signal and through a series of subsequent signals to result in the relay being operative to be in an activated operational state upon being energized by the switching transistor to operationally effectuate the selected response from the HVAC building system.

Claims

1. An HVAC monitoring system that tests for an environmental abnormal condition defined as an event marker, utilizing an existing sensor that outputs an available first event marker signal along a first communication when detecting the environmental abnormal condition, wherein the environmental abnormal condition through said HVAC monitoring system effectuates a selected response from an existing HVAC building system that includes an existing HVAC control circuit board with an electrical utility alternating current neutral wire leg and a fan door switch with an electrical utility alternating current hot wire leg, said HVAC monitoring system comprising: (a) a first electrical power supply that receives an alternating current supply system electrical power switched hot leg from the HVAC fan door switch and an electrical utility alternating current neutral wire leg from the existing HVAC control circuit board, said first electrical power supply includes a first electrical buck convertor transformer receiving the switched hot leg and the neutral wire leg, wherein said first electrical buck convertor transformer outputs a first reduced alternating current voltage with said reduced voltage being compatible with electrical power requirements of the existing HVAC control circuit board, said first electrical power supply further includes a full wave bridge rectifier circuit with a wave smoothing capacitor and resistor for more consistent voltage resulting in an output that converts said first reduced alternating current voltage to a first reduced voltage direct current to be more fully compatible with electrical power requirements of the existing HVAC control circuit board, said first electrical power supply also includes a second electrical buck convertor transformer receiving said existing HVAC control circuit board compatible reduced voltage direct current, wherein said second electrical buck convertor transformer outputs a second reduced direct current voltage with said second reduced direct current voltage being compatible with electrical power requirements of a semiconductor printed circuit board; (b) a second electrical power supply that is adapted to receive alternating current supply electrical power from a building wall electrical outlet, said second electrical power supply outputs a third reduced direct current voltage with said third reduced direct current voltage being compatible with electrical power requirements of a semiconductor printed circuit board; (c) a programable audio frequency sensor that receives input electrical power from said third reduced direct current voltage, operationally said programable audio frequency sensor scans for the environmental abnormal condition as indicated by the existing sensor that outputs the available first event marker signal, wherein said programable audio frequency sensor is operative to monitor for the available first event marker signal and when said first event marker signal is received results in said programable audio frequency sensor outputting a second event marker signal along a second communication; (d) a programable radio frequency transmitter that receives input electrical power from said third reduced direct current voltage, said programable radio frequency transmitter is operative to monitor for said second event marker signal and when said second event marker signal is received results in said programable radio frequency transmitter outputting a third event marker signal along a third communication; (e) a programable radio frequency receiver that receives input electrical power from said second reduced direct current voltage, said programable radio frequency receiver is operative to monitor said third event marker signal and when said third event marker signal is received results in said programable radio frequency receiver outputting a fourth event marker signal along a fourth communication; (f) programable control circuitry that receives input electrical power from said second reduced direct current voltage, said programable control circuitry is in a ready state being operative to monitor for said fourth event marker signal and when said fourth event marker signal is received results in said control circuitry outputting a fifth event marker signal along a fifth communication; (g) a switching transistor having a base connection, a collector connection, and an emitter connection, said base connection is in electrical communication with said fifth communication and is operative to receive said fifth event marker signal and when said fifth event marker signal is received results in said collector connection and said emitter connection being placed from a transistor open electrical communication state to a transistor closed electrical communication state to facilitate electrical communication from said collector connection to said emitter connection; and (h) a normally closed electrical relay that receives input electrical power from said first reduced voltage direct current being a positive leg only to a primary terminal of said normally closed electrical relay, wherein said first reduced voltage direct current being compatible with the electrical power requirements of the existing HVAC control circuit board, said normally closed electrical relay is also in electrical communication to said switching transistor collector connection through a secondary terminal on said normally closed electrical relay, said normally closed electrical relay switched leg is disposed in electrical communication as between an existing HVAC control circuit board fan relay output connector and an existing HVAC fan motor relay resulting in operationally said normally closed electrical relay controlling building full voltage alternating current electrical power to an existing HVAC fan motor that results in the existing HVAC fan motor being operational when said normally closed electrical relay is in an un-activated operational state such that said normally closed electrical relay is in a closed state, and when said normally closed electrical relay is in an activated operational state from allowing electrical communication from said secondary terminal to a negative ground of said first reduced voltage direct current therethrough said collector connection to said emitter connection, resulting in said normally closed electrical relay switched leg moving to an open state resulting in the existing HVAC fan motor being deactivated.

2. An HVAC monitoring system according to claim 1 wherein said a programable audio frequency sensor can further include enhanced sensor structure for detecting the environment abnormal condition that is selected from the group consisting of ambient temperature, smoke ionization, smoke optical, smoke photoelectric, catalytic combustible gas sensor for; natural gas, hydrogen, or propane, a carbon monoxide detector, or an ultraviolet infrared flame detector, for the environmental abnormal condition as indicated by said enhanced sensor structure resulting in outputting said second event marker signal along said second communication.

3. An HVAC monitoring system according to claim 1 wherein said programable radio frequency receiver through said third event marker signal is programmed to filter frequencies of said third even marker signal to only allow frequencies that have a high reliability for indicating the environmental abnormal condition from the existing sensor, prior to said programable radio frequency receiver outputting said fourth event marker signal along a fourth communication.

4. An HVAC monitoring system according to claim 1 wherein said programable audio frequency sensor is programmed to pair with said programmable radio frequency transmitter with said programable audio frequency sensor is programmed to measure peak frequency values within a selected range using a Fourier transform function to enable said programmable radio frequency transmitter through said third event marker signal to only transmit said selected range peak frequency values to said programable radio frequency receiver to better have said programable audio frequency sensor detect the environmental abnormal condition as indicated by the existing sensor that outputs the available first event marker signal.

5. An HVAC monitoring system according to claim 4 wherein said selected range peak frequency values are programmed to be stored in a variable to help eliminate unintelligible values that were included in said selected range peak frequency values from said programable audio frequency sensor, resulting in modified selected range peak frequency values to further better have said programable audio frequency sensor detect the environmental abnormal condition as indicated by the existing sensor that outputs the available first event marker signal.

6. An HVAC monitoring system according to claim 5 wherein said programable radio frequency receiver through said third event marker signal is programmed to ignore repeated selected range peak frequency values of said third event marker signal to prevent repeated erroneous selected range peak frequency values as contained within said second event marker signal from said programable audio frequency sensor when there was an absence of said first event market signal.

7. A method for installing an HVAC monitoring system that tests for an environmental abnormal condition defined as an event marker, utilizing an existing sensor that outputs an available first event marker signal along a first communication when detecting the environmental abnormal condition, wherein the environmental abnormal condition through said HVAC monitoring system effectuates a selected response from an existing HVAC building system that includes an existing HVAC control circuit board with an electrical utility alternating current neutral wire leg and a fan door switch with an electrical utility alternating current hot wire leg, said method for installing an HVAC monitoring system comprises the steps of: (a) providing a first electrical power supply that receives an alternating current supply system electrical power switched hot leg from the HVAC fan door switch and an electrical utility alternating current neutral wire leg from the existing HVAC control circuit board, said first electrical power supply includes a first electrical buck convertor transformer receiving the switched hot leg and the neutral wire leg, wherein said first electrical buck convertor transformer outputs a first reduced alternating current voltage with said reduced voltage being compatible with electrical power requirements of the existing HVAC control circuit board, said first electrical power supply further includes a full wave bridge rectifier circuit with a wave smoothing capacitor and resistor for more consistent voltage resulting in an output that converts said first reduced alternating current voltage to a first reduced voltage direct current to be more fully compatible with electrical power requirements of the existing HVAC control circuit board, said first electrical power supply also includes a second electrical buck convertor transformer receiving said existing HVAC control circuit board compatible reduced voltage direct current, wherein said second electrical buck convertor transformer outputs a second reduced direct current voltage with said second reduced direct current voltage being compatible with electrical power requirements of a semiconductor printed circuit board; (b) providing a second electrical power supply that is adapted to receive alternating current supply electrical power from a building wall electrical outlet, said second electrical power supply outputs a third reduced direct current voltage with said third reduced direct current voltage being compatible with electrical power requirements of a semiconductor printed circuit board; (c) providing a programable audio frequency sensor that receives input electrical power from said third reduced direct current voltage, operationally said programable audio frequency sensor scans for the environmental abnormal condition as indicated by the existing sensor that outputs the available first event marker signal, wherein said programable audio frequency sensor is operative to monitor for the available first event marker signal and when said first event marker signal is received results in said programable audio frequency sensor outputting a second event marker signal along a second communication; (d) providing a programable radio frequency transmitter that receives input electrical power from said third reduced direct current voltage, said programable radio frequency transmitter is operative to monitor for said second event marker signal and when said second event marker signal is received results in said programable radio frequency transmitter outputting a third event marker signal along a third communication; (e) providing a programable radio frequency receiver that receives input electrical power from said second reduced direct current voltage, said programable radio frequency receiver is operative to monitor said third event marker signal and when said third event marker signal is received results in said programable radio frequency receiver outputting a fourth event marker signal along a fourth communication; (f) providing programable control circuitry that receives input electrical power from said second reduced direct current voltage, said programable control circuitry is in a ready state being operative to monitor for said fourth event marker signal and when said fourth event marker signal is received results in said control circuitry outputting a fifth event marker signal along a fifth communication; (g) providing a switching transistor having a base connection, a collector connection, and an emitter connection, said base connection is in electrical communication with said fifth communication and is operative to receive said fifth event marker signal and when said fifth event marker signal is received results in said collector connection and said emitter connection being placed from a transistor open electrical communication state to a transistor closed electrical communication state to facilitate electrical communication from said collector connection to said emitter connection; (h) providing a normally closed electrical relay that receives input electrical power from said first reduced voltage direct current being a positive leg only to a primary terminal of said normally closed electrical relay, wherein said first reduced voltage direct current being compatible with the electrical power requirements of the existing HVAC control circuit board, said normally closed electrical relay is also in electrical communication to said switching transistor collector connection through a secondary terminal on said normally closed electrical relay, said normally closed electrical relay switched leg is disposed in electrical communication as between an existing HVAC control circuit board fan relay output connector and an existing HVAC fan motor relay resulting in operationally said normally closed electrical relay controlling building full voltage alternating current electrical power to an existing HVAC fan motor that results in the existing HVAC fan motor being operational when said normally closed electrical relay is in an un-activated operational state such that said normally closed electrical relay is in a closed state, and when said normally closed electrical relay is in an activated operational state from allowing electrical communication from said secondary terminal to a negative ground of said first reduced voltage direct current therethrough said collector connection to said emitter connection, resulting in said normally closed electrical relay switched leg moving to an open state resulting in the existing HVAC fan motor being deactivated; (i) disconnecting building electrical power to the existing HVAC building system; (j) removing an existing fan door and an access panel for the existing HVAC control circuit board both from the existing HVAC building system; (k) locating the existing HVAC control circuit board and in particular finding the existing HVAC control circuit board fan relay output connector that puts the existing HVAC control circuit board fan relay output connector in electrical communication with an existing HVAC system fan motor relay; (l) disconnecting an existing HVAC fan motor electrical communication as between the existing HVAC control circuit board fan relay output connector and the existing HVAC system fan motor relay to operationally force the existing HVAC fan motor electrical communication through said HVAC monitoring system, thus interrupting the existing electrical communication as between the existing HVAC control circuit board fan relay output connector and the existing HVAC system fan motor relay; (m) connecting an electrical communication defined as Fan 1 from the existing HVAC control circuit board fan relay output connector to an input connector of said normally closed electrical relay; (n) connecting an electrical communication defined as Fan 2 from an output connector of said normally closed electrical relay to the existing HVAC system fan motor relay; (o) locating the existing HVAC building system fan door switch that has two electrical communications, identifying which of the two electrical connections is opposite of an electrical power feed electrical communication that is identified by tracing back the existing HVAC building system building electrical power feed; (p) splicing into the non-electrical power feed electrical communication from said step (o) with an electrical communication defined as Hot 1 and connecting said Hot 1 to a building alternating current power Hot 1 input on said HVAC monitoring system; (q) locating the existing HVAC control circuit board and specifically the existing HVAC building system building electrical power feed on the existing HVAC control circuit board for a neutral electrical power feed; (r) splicing into the existing HVAC control circuit board for a neutral electrical power feed with an electrical communication defined as Neutral 1 and connecting said Neutral 1 to a building alternating current power Neutral 1 input on said HVAC monitoring system, wherein operationally this allows said HVAC monitoring system power input to be dependent upon the existing HVAC building system fan door switch that will deactivate said HVAC monitoring system while simultaneously deactivating the existing HVAC control circuit board if the existing HVAC building system fan door is opened being for safety, if the existing HVAC building system fan door is closed, then said HVAC monitoring system will deactivate the existing HVAC building system fan only upon the environmental abnormal condition, and if the environmental abnormal condition does not exist, said HVAC monitoring system allows the existing HVAC control circuit board to control the existing HVAC building system fan normally, as the existing HVAC system fan motor relay connection on the HVAC control circuit board is in direct electrical communication with the existing HVAC building system fan motor relay, as said normally closed electrical relay remains in a closed electrical; state allowing the existing HVAC control circuit board to control the existing HVAC building system fan normally; and (s) plugging in said second electrical power supply to the building wall outlet to supply said third reduced direct current voltage to said programable audio frequency sensor and said programable radio frequency transmitter, this is to operationally allow said programable audio frequency sensor and said programable radio frequency transmitter to be wirelessly remote from said first electrical power supply, said programable radio frequency receiver, said programable control circuitry, said switching transistor, and said normally closed electrical relay.

Description

BRIEF DESCRIPTION OF DRAWINGS

[0023] FIG. 1 shows a summary schematic diagram of the HVAC monitoring system in the normal environmental condition operational state with the HVAC blower motor in the normal enabled operational state;

[0024] FIG. 2 shows a summary schematic diagram of the HVAC monitoring system in the emergency environmental condition state with the HVAC blower motor in the disabled operational state;

[0025] FIG. 3 shows a component/element perspective functional view of the HVAC monitoring system as a module with the interfaces to an existing HVAC door switch, an existing neutral leg connection on an existing HVAC control circuit board, in addition to an existing HVAC fan motor relay connection, and an existing relay of the existing HVAC fan motor, further a wireless signal from an existing sensor to an audio frequency sensor that is in electrical communication with a programable radio frequency transmitter that is in wireless communication with the HVAC monitoring system as a module;

[0026] FIG. 4 shows an electrical schematic of a power supply circuitry of the HVAC monitoring system that includes an existing 120 VAC electrical power supply that is in electrical communication with a first buck converter transformer that is in electrical communication with a full wave bridge rectifier that is in electrical communication with a smoothing capacitor and a voltage control resistor providing electrical power for an existing HVAC control circuit board, wherein the smoothing capacitor and the voltage control resistor are also further in electrical communication with a second buck converter transformer providing printed circuit board power;

[0027] FIG. 5 shows an electrical schematic of the HVAC monitoring system in the normal environmental condition state with the relay in the closed position facilitating the activated enabled state of the existing fan blower motor with the power supply electrical schematic not shown for clarity (as the power supply electrical schematic is detailed in FIG. 4), thus shown in FIG. 5 in a summary manner, the wireless signal is not shown from the existing sensor to the audio frequency sensor (as the existing sensor in not sensing an abnormal environmental condition and thus does not create the wireless signal) the audio frequency sensor is in electrical communication with the programable radio frequency transmitter that is in wireless communication (again this wireless communication is not shown due to no abnormal environmental condition sensed) with a programmable radio frequency receiver that is in electrical communication with a programmable control circuitry that in turn is in electrical communication with a switching transistor that is displaced between the electrical power supply for the existing HVAC control circuit board and the existing HVAC control circuit board ground, wherein in the normal environmental condition state the switching transistor is in an open operational state, thus resulting in the relay being de-energized remaining in the normally closed operational state with the HVAC blower motor in the normal enabled operational state;

[0028] FIG. 6 shows an electrical schematic of the HVAC monitoring system from FIG. 5, wherein FIG. 6 is in the alternative environmental abnormal condition state with the relay in the open position facilitating the disabled state of the existing fan blower motor with the power supply electrical schematic not shown for clarity (as the power supply electrical schematic is detailed in FIG. 4), thus shown in FIG. 6 in a summary manner is the wireless signal from the existing sensor to the audio frequency sensor that is in electrical communication with the programable radio frequency transmitter that is in wireless communication with the programmable radio frequency receiver that is in electrical communication with the programmable control circuitry that in turn is in electrical communication with the switching transistor that is displaced between the electrical power supply for the existing HVAC control circuit board and the existing HVAC control circuit board ground, wherein in the alternative environmental abnormal condition state the switching transistor is closed thus resulting in the relay being energized thus the relay being moved to the open operational state resulting in the HVAC blower motor in the disabled operational state;

[0029] FIG. 7 shows an upper perspective view of a complete HVAC building system that includes a return duct, an exit duct, a thermostat, a heating element, a cooling element, a fan, and a fan motor, further shown is the existing sensor with a probe extension to show in context the possible typical existing sensor mounting with the HVAC building system, however noting that the existing sensor does not have to be mounted on an HVAC building system as the existing sensor can be located anywhere proximate to the building; and

[0030] FIG. 8 shows a side elevation cross section of a use and installed drawing of the HVAC monitoring system, wherein the building is a typical residential structure with a basement, main floor, and a second story. Further, in FIG. 8 the residential structure shows a building system in the form of a typical heating ventilation and cooling system (HVAC) in the basement with HVAC floor by floor air outlets shown and HVAC floor by floor air inlets shown throughout the residential structure as is also typical. Further shown in FIG. 8 are the return and exit ducts, wherein specifically the existing sensor is shown mounted in the return duct, wherein operationally if a fire occurs as shown on the second floor, the existing sensor can detect smoke in the return duct and generate a first event marker signal through a first communication with the programmable audio frequency sensor that concurrently generates a second event market signal through the second communication to the programmable radio frequency transmitter that generates a third event marker signal that wireless transmits along a third communication to the programmable radio frequency receiver that outputs a fourth event marker signal along a fourth electrical communication to the programable control circuitry that outputs a fifth event marker signal along a fifth electrical communication to the switching transistor that closes the switching transistor from being open, wherein the closed switching transistor activates the relay from the normally closed state to the open state thus resulting in deactivating the motor and blower of the typical heating ventilation and cooling system (HVAC), to stop the circulation of air at the return duct inlets and exit duct outlets to help prevent feeding the fire oxygen, to stop the HVAC building system from trying to cool the residential structure, and to help prevent the circulation of toxic smoke throughout the residential building structure to lessen the negative effects of the fire.

REFERENCE NUMBERS IN DRAWINGS

[0031] 50 HVAC Monitoring System [0032] 55 Environmental abnormal or emergency condition state which can be typically air that is contaminated [0033] 60 Environmental abnormal condition state which can be smoke in the air [0034] 61 Normal environmental condition state [0035] 65 Existing HVAC building system that typically includes the return duct 70, the exit duct 75, the thermostat 80, the fan 85, the heating element 90, and the cooling element 95, the fan 85, and the fan motor 88, and the HVAC control circuit board 371 [0036] 70 Return duct of the HVAC building system 65 [0037] 75 Exit duct of the HVAC building system 65 [0038] 76 Enclosure of the fan 85 and fan motor 88 [0039] 77 Access door opening of the enclosure 76 [0040] 80 Thermostat of the HVAC building system 65 [0041] 81 Existing door switch of the fan 85 and fan motor 88 disposed as between the access door 77 and the enclosure 76 of the existing HVAC building system 65 [0042] 85 Fan/blower of the HVAC building system 65 [0043] 87 Filter of the fan 85 [0044] 88 Motor of the fan/blower 85 [0045] 89 Existing relay of the fan 85 motor 88 [0046] 90 Heating element of the HVAC building system 65 [0047] 91 Disabled/deactivated state of the fan motor 88 [0048] 92 Enabled state of the fan motor 88 [0049] 95 Cooling element of the HVAC building system 65 [0050] 105 Selected response from of the HVAC building system 65 typically being the deactivation/disabled state 91 of the HVAC building 65 fan 85 via the fan motor 88 [0051] 106 Hot wire 110 VAC building electrical power 830 feed to the HVAC monitoring system 50 or more specifically power supply circuitry 107 or first electrical power supply circuitry 701 [0052] 107 Power supply circuitry of the HVAC monitoring system 50 [0053] 108 Neutral wire 110 VAC building electrical power 830 feed to the HVAC monitoring system 50 or more specifically power supply circuitry 107 or first electrical power supply circuitry 701 [0054] 140 Fire [0055] 165 Residential or commercial building [0056] 166 Interior of the residential or commercial building 165 [0057] 167 Exterior of the residential or commercial building 165 [0058] 170 HVAC air outlet or outlet air movement [0059] 175 HVAC air inlet or inlet air movement [0060] 205 Available existing first event marker signal from the existing sensor 320 to the programable audio frequency sensor 810 in the form of sound waves 790 and/or radio frequency 791 through the existing first communication 215 [0061] 215 Available existing first communication for the existing first event marker signal 205 that can be between the existing sensor 320 to the programable audio frequency sensor 810 in the form of sound waves 790 and/or radio frequency 791 [0062] 220 Second event marker signal from the programable audio frequency sensor 810 to the programable radio frequency transmitter 805 during the environmental abnormal condition state 55 which can be typically air that is contaminated or the environmental abnormal condition state which can be smoke in the air 60 [0063] 225 Relay that is in the normally closed operational state for the existing fan 85 and motor 88 that is preferably a UXCELL model A14060500ux1280 [0064] 226 Activated operational state of the relay 225 in the open operational state resulting in the disabled state 91 of the fan motor 88 [0065] 227 Un-activated/deenergized operational state of the relay 225 in the normally closed operational state resulting in the enabled state 92 of the fan motor 88 as long as the existing HVAC control circuitry 371 is in the enabled state 92 of the fan motor 88 [0066] 228 Primary terminal of the relay 225 [0067] 229 Secondary terminal of the relay 225 [0068] 230 Second communication of the second event marker signal 220 that can be between the programable audio frequency sensor 810 and the programable radio frequency transmitter 805 [0069] 235 Structural ductwork of the return duct 70 of the HVAC building system 65 [0070] 240 Existing sensor 320 that can be disposed partially within the structural ductwork 235 [0071] 245 Gas 55 flow of the structural ductwork 235 [0072] 250 Sidewall of the structural ductwork 235 [0073] 255 Probe extension of the existing sensor 320 [0074] 260 Interior of the structural ductwork 235 [0075] 270 Outside of the sidewall 250 [0076] 320 Existing sensor, wherein the existing sensor can be but not limited to detecting the environment abnormal condition 55, 60 that is selected from the group including; audio alarms, ambient temperature, smoke ionization, smoke optical, smoke photoelectric, catalytic combustible gas sensor for; natural gas, hydrogen, or propane, a carbon monoxide detector, or an ultraviolet infrared flame detector, although the existing sensor 320 is shown disposed in the structural ductwork 235 interior 260, the existing sensor 320 can be located anywhere within the interior 166 of the building 165 or even proximate to the exterior 167 of the building 165 [0077] 371 Existing HVAC control circuitry board of the existing HVAC building system 65 [0078] 372 Existing HVAC control circuitry 371 electrical neutral leg power feed, typically 110 VAC, connector from the building utility electrical power 830 [0079] 373 Existing electrical hot leg power feed, typically 110 VAC, 106 connector on the input of the existing HVAC building system 65 fan 85 door switch 81 from the building utility electrical power 830 [0080] 375 Existing HVAC control circuitry 371 fan 85 motor 88 relay output connector [0081] 376 Disconnect point of the existing electrical communication as between existing fan 85 motor 88 relay output connector 375 and the existing fan 85 motor 88 relay 89, this modification is done to force the electrical communication from the existing relay output connector 375 to the existing fan 85 motor 88 relay 89 therethrough the HVAC monitoring system 50 to enable the HVAC monitoring system to control the fan 85 motor 88 disabling during the abnormal environmental condition 55, 60 and when there is a normal environmental condition 61, the HVAC monitoring system 50 allows electrical communication from the existing relay output connector 375 to the existing fan 85 motor 88 relay 89 for normal existing HVAC control circuitry operation, i.e. fan 85 motor 88 delay upon the existing HVAC building system 65 heat exchanger warm-up, and prolonged fan 85 motor 88 operation for existing HVAC building system 65 heat exchanger cool down after the existing gas burner is deactivated.

[0082] 377 Fan relay inlet connection for the HVAC monitoring system 50 from the existing HVAC control circuitry 371 existing HVAC control circuitry fan 85 motor 88 relay output connector 375 [0083] 378 Hot wire leg electrical power outlet from the existing door switch 81 [0084] 379 Electrical communication from hot wire leg electrical power outlet 378 to the hot wire 110 VAC building electrical power 830 feed 106 to the HVAC monitoring system 50, being defined as Hot 1 [0085] 380 Electrical communication from the existing electrical neutral leg power feed 372 to the neutral wire 110 VAC building electrical power 830 feed 108 to the HVAC monitoring system 50 or more specifically to the power supply circuitry 107 or first electrical power supply circuitry 701 [0086] 381 Fan relay outlet connection from the HVAC monitoring system 50 to the existing fan 85 motor 88 relay 89 [0087] 382 Electrical communication defined as Fan 1 from the existing HVAC control circuitry fan 85 motor 88 relay output connector 375 to the fan relay inlet connection 377 [0088] 383 Electrical communication defined as Fan 2 from the fan relay outlet connection 381 to the existing relay 89 of the fan 85 motor 88 [0089] 384 Existing electrical communication that is broken at disconnect point 376 from the existing HVAC control circuitry 371 fan 85 motor 88 relay output connector 375 to the existing fan 85 motor 88 relay 89 [0090] 700 Programmable control circuitry that is preferably an ARDUINO UNO model ELEGOO-UNO-R3 [0091] 701 First electrical power supply that includes elements 106, 379, 380, 108, 715, 705, 800, 720, 765, 770, 775, 725, 710, 730, and 731 [0092] 705 Electrical buck converter 1 first transformer that is preferably a HAMMOND model 187020 taking 110 VAC building wall electrical power 830 to about 24 VAC [0093] 710 Electrical buck converter 2 second transformer that is preferably an EBOOT MINI model MP1584EN being DC to DC taking 24 VDC used in existing HVAC control circuitry 371 to about 5 VDC used for printed circuit boards such as programable control circuitry 700 and programable radio frequency receiver 780 [0094] 715 Electrical input being 110 VAC of the electrical buck converter 1 transformer 705 [0095] 720 Electrical output being about 24 VAC 800 of the electrical buck converter 1 transformer 705 [0096] 725 Electrical input being about 24 VDC of the electrical buck converter 2 transformer 710 being the first reduced direct current voltage [0097] 730 Electrical output being about 5 VDC 731 of the electrical buck converter 2 transformer 710 [0098] 731 Second reduced DC voltage [0099] 735 Electrical resister R1 preferably about 2.2K ohms for current limiting [0100] 740 Electrical communication from the electrical output being about 5 VDC 730 to programmable control circuitry 700 [0101] 745 Electrical communication from the electrical input being about 24 VDC 725 to the relay that is in the normally closed operational state 225 [0102] 750 Switching transistor being preferably a CENTRAL SEMICONDUCTOR CORPORATION model TIP 120 [0103] 755 Diode is preferably a SMC DIODE SOLUTIONS model 1N4004 [0104] 760 Fifth event marker signal from the programmable control circuitry 700 in operational state being the environmental abnormal condition 55, 60 to switching transistor 750 “base” leg [0105] 761 Fifth communication of the fifth event marker signal 760 as between the programmable control circuitry 700 pin 13 and the switching transistor 750 “base” leg [0106] 765 Full wave bridge rectifier diodes D1, D2, D3, D4 that are preferably MXUTEUK electronic silicon diodes model M-021 [0107] 770 Capacitor rectified wave smoothing preferably rated at 470 micro-Farads [0108] 775 Resistor R2 for voltage control preferably rated at 10K ohms [0109] 780 Programable radio frequency receiver that is preferably a KWMOBILE model MX-05V [0110] 785 Fourth event marker signal from the programable radio frequency receiver 780 to the programmable control circuitry 700 to pin 11 [0111] 786 Fourth communication of the fourth event marker signal 785 from the programable radio frequency receiver 780 to the programmable control circuitry 700 to pin 11 [0112] 790 Sound waves being the first event marker signal 205 along the first communication 215 from the existing sensor 320 to the programable audio frequency sensor 810 [0113] 791 Radio frequency waves alternatively being the first event marker signal 205 along the first communication 215 from the existing sensor 320 to the programable audio frequency sensor 810 [0114] 795 Third event marker signal from the programable radio frequency transmitter 805 to the programable radio frequency receiver 780 that is preferably a wireless signal [0115] 796 Third communication of the third event marker signal 795 from the programable radio frequency transmitter 805 to the programable radio frequency receiver 780 that is preferably a wireless communication for the third communication 796 [0116] 800 First reduced AC voltage [0117] 805 Programable radio frequency transmitter that is preferably a KWMOBILE model MX-FS-03V [0118] 810 Programable audio frequency sensor that is preferably a DEVMO with UPC 741722788615 or alternatively can be another sensor type but not limited to detecting the environment abnormal condition 55, 60 that is selected from the group including; ambient temperature, smoke ionization, smoke optical, smoke photoelectric, catalytic combustible gas sensor for; natural gas, hydrogen, or propane, a carbon monoxide detector, or an ultraviolet infrared flame detector [0119] 815 Second electrical power supply that takes standard building wall outlet electrical power 830 being 110 VAC and converting to 5 VDC printed circuit board power for the elements being the programable audio frequency sensor 810 and programable radio frequency transmitter 805, note the reason for the second electrical power supply 815 from the first electrical power supply 701 is to accommodate the remote wireless location of the programable audio frequency sensor 810 and programable radio frequency transmitter 805 that use the second electrical power supply 815 in relation to the first electrical power supply 701 and the other elements 700, 780, 750, 225, and 755 being in a different location with wireless communication 795, 796 as between the radio frequency transmitter 805 and the programable radio frequency receiver 780, preferably the second electrical power supply 815 is a CORPORATE COMPUTER model LJH-186 [0120] 820 Input electrical power 110 VAC 830 of the second electrical power supply 815 825 Output electrical power that is a third reduced direct current voltage output being 5 VDC of the second electrical power supply 815 to provide an electrical power supply for the programable audio frequency sensor 810 and the programable radio frequency transmitter 805 [0121] 830 Standard building wall outlet electrical power being 110 VAC

DETAILED DESCRIPTION

[0122] With initial reference to FIG. 1 shows a summary schematic diagram of the HVAC monitoring system 50 in the normal environmental condition operational state 61 with the HVAC blower fan 85 motor 88 in the normal enabled operational state 61, 92.

[0123] Continuing, FIG. 2 shows a summary schematic diagram of the HVAC monitoring system 50 in the emergency environmental condition state 55 with the HVAC blower fan 85 motor 88 in the disabled operational state 91.

[0124] Further, FIG. 3 shows a component/element perspective functional view of the HVAC monitoring system 50 as a module 50 with the interfaces to an existing HVAC door switch 81, an existing neutral leg connection 372 on an existing HVAC control circuit board 371, in addition to an existing HVAC fan 85 motor 88 relay connection, and an existing relay 89 of the existing HVAC fan 85 motor 88, further a wireless signal 790, 791 from an existing sensor 320 to an audio frequency sensor 810 that is in electrical communication with a programable radio frequency transmitter 805 that is in wireless communication 795, 796 with the HVAC monitoring system 50 as a module 50.

[0125] Moving onward, FIG. 4 shows an electrical schematic of a power supply circuitry 107 of the HVAC monitoring system 50 that includes an existing 120 VAC electrical power supply 397, 380 that is in electrical communication 715 with a first buck converter transformer 705 that is in electrical communication 720 with a full wave bridge rectifier 765 that is in electrical communication with a smoothing capacitor 770 and a voltage control resistor 775 providing electrical power 720, 725 for an existing HVAC control circuit board 371, wherein the smoothing capacitor 770 and the voltage control resistor 775 are also further in electrical communication 725 with a second buck converter transformer 710 providing printed circuit board power 730, 731.

[0126] Next, FIG. 5 shows an electrical schematic of the HVAC monitoring system 50 in the normal environmental condition state 61 with the relay 225 in the closed position 227 facilitating the activated enabled state 92 of the existing fan blower 85 motor 88 with the power supply electrical schematic 107 not shown for clarity (as the power supply electrical schematic 107 is detailed in FIG. 4).

[0127] Thus shown in FIG. 5 in a summary manner, is the wireless signal in not shown from the existing sensor 320 to the audio frequency sensor 810 that is in a second electrical communication 230 with the programable radio frequency transmitter 805 that is in wireless communication (not shown) with a programmable radio frequency receiver 780 that is in electrical communication 786 with a programmable control circuitry 700 that in turn is in a fifth electrical communication 761 with a switching transistor 750 that is displaced between the electrical power supply 725 for the existing HVAC control circuit board 371 and the existing HVAC control circuit board 371 ground, wherein in the normal environmental condition state 61 the switching transistor 750 is in the open operational state thus resulting in the relay 225 being de-energized 227 remaining in the normally closed operational state with the HVAC blower 85 motor 88 in the normal enabled operational state 92.

[0128] Continuing, FIG. 6 shows an electrical schematic of the HVAC monitoring system 50 from FIG. 5, wherein FIG. 6 is in the alternative environmental abnormal condition state 55, 60 with the relay 225 in the open position 226 facilitating the disabled state 91 of the existing fan blower 85 motor 88 with the power supply electrical schematic 107 not shown for clarity (as the power supply electrical schematic 107 is detailed in FIG. 4), thus shown in FIG. 6 in a summary manner is the wireless signal 790, 791 from the existing sensor 320 to the audio frequency sensor 810 that is in the second electrical communication 220, 230 with the programable radio frequency transmitter 805 that is in wireless communication 795, 796 with the programmable radio frequency receiver 780 that is in electrical communication 785, 786 with the programmable control circuitry 700 that in turn is in the fifth electrical communication 760, 761 with the switching transistor 750 that is displaced between the electrical power supply 725 for the existing HVAC control circuit board 371 and the existing HVAC control circuit board 371 ground, wherein in the alternative environmental abnormal condition state 55, 60 the switching transistor 750 is closed thus resulting in the relay 225 being energized 226 thus the relay 225 being moved to the open operational state 226 resulting in the HVAC blower 85 motor 88 in the disabled operational state 91.

[0129] Moving onward, FIG. 7 shows an upper perspective view of a complete HVAC building system 65 that includes a return duct 70, an exit duct 75, a thermostat 80, a heating element 90, a cooling element 95, a fan/blower 85, and a fan motor 88, further shown is the existing sensor 320 with a probe extension 255 to show in context the possible typical existing sensor 320 mounting with the HVAC building system 65, however noting that the existing sensor 320 does not have to be mounted on an HVAC building system 65 as the existing sensor 320 can be located anywhere proximate to the building 165.

[0130] Further, FIG. 8 shows a side elevation cross section of a use and installed drawing of the HVAC monitoring system 50, wherein the building 165 is a typical residential structure 165 with a basement, main floor, and a second story. Further, in FIG. 8 the residential structure 165 shows a building system in the form of a typical heating ventilation and cooling system 65 (HVAC) in the basement with HVAC floor by floor air outlets 170 shown and HVAC floor by floor air inlets 175 shown throughout the residential structure 165 as is also typical.

[0131] Further shown in FIG. 8 are the return 175 and exit ducts 170, wherein specifically the existing sensor 320 is shown mounted in the return duct, wherein operationally if a fire 140 occurs as shown on the second floor, the existing sensor 320 can detect smoke 245 in the return duct 235 and generate a first event marker signal 205 through a first communication 215 with the programmable audio frequency sensor 810 that concurrently generates a second event market signal 220 through the second communication 230 to the programmable radio frequency transmitter 805 that generates a third event marker signal 795 that wireless transmits along a third communication 796 to the programmable radio frequency receiver 780 that outputs a fourth event marker signal 785 along a fourth electrical communication 786 to the programable control circuitry 700 that outputs a fifth event marker signal 760 along a fifth electrical communication 761 to the switching transistor 750 that closes the switching transistor 750 from being open.

[0132] FIG. 8 shows that the closed switching transistor 750 activates 226 the relay 225 from the normally closed state 227 to the open state 226 thus resulting in deactivating 91 the motor 88 and blower/fan 85 of the typical heating ventilation and cooling system 65 (HVAC), to stop the circulation of air 175 at the return duct inlets 175 and exit duct outlets 170 to help prevent feeding the fire 140 oxygen, to stop the HVAC building system 65 from trying to cool the residential structure 165, and to help prevent the circulation of toxic smoke throughout the residential building structure 165 to lessen the negative effects of the fire 140.

[0133] Broadly, the present invention is an HVAC monitoring system 50, that tests for an environmental abnormal condition 60 defined as an event marker, utilizing an existing sensor 320 that outputs an available first event marker signal 205 along a first communication 215 when detecting the environmental abnormal condition 60, wherein the environmental abnormal condition 60 through the HVAC monitoring system 50 effectuates a selected response 105 from an existing HVAC building system 65 that includes an existing HVAC control circuit board 371 with an electrical utility alternating current neutral wire leg 372 and a fan door switch 81 with an electrical utility alternating current hot wire leg 373, see in particular FIGS. 1 to 3.

[0134] The HVAC monitoring system 50 includes a first electrical power supply 701 that receives an alternating current supply system electrical power switched hot leg 378, 379 from the HVAC fan door switch 81 and an electrical utility alternating current neutral wire leg 372 from the existing HVAC control circuit board 371, the first electrical power supply 701 includes a first electrical buck convertor transformer 705 receiving the switched hot leg 379 and the neutral wire leg 372, wherein the first electrical buck convertor transformer 705 outputs a first reduced alternating current voltage 720, 800 with the reduced voltage 720 being compatible with electrical power requirements of the existing HVAC control circuit board 371, see FIGS. 3 and 4.

[0135] The first electrical power supply 701 further includes a full wave bridge rectifier circuit 765 with a wave smoothing capacitor 770 and resistor 775 for more consistent voltage resulting in an output 725 that converts the first reduced alternating current voltage 720 to a first reduced voltage direct current 725 to be more fully compatible with electrical power requirements of the existing HVAC control circuit board, 371, see FIGS. 3, 4, 5, and 6. The first electrical power supply 701 also includes a second electrical buck convertor transformer 710 receiving the existing HVAC control circuit board 371 compatible reduced voltage direct current 725, wherein the second electrical buck convertor transformer 710 outputs a second reduced direct current voltage 730 with the second reduced direct current voltage 730 being compatible with electrical power requirements of a semiconductor printed circuit board, see FIG. 4.

[0136] Further included in the HVAC monitoring system is a second electrical power supply 815 that is adapted to receive alternating current supply electrical power 820 from a building wall electrical outlet, the second electrical power supply 815 outputs a third reduced direct current voltage 825 with the third reduced direct current voltage 825 being compatible with electrical power requirements of a semiconductor printed circuit board, see FIGS. 5 and 6. Also, a programable audio frequency sensor 810 that receives input electrical power from the third reduced direct current voltage 825, operationally the programable audio frequency sensor 810 scans for the environmental abnormal condition 60 as indicated by the existing sensor 320 that outputs the available first event marker signal 205, wherein the programable audio frequency sensor 810 is operative to monitor for the available first event marker signal 205 and when the first event marker signal 205 is received results in the programable audio frequency sensor 810 outputting a second event marker signal 220 along a second communication 230, see FIGS. 3 and 6.

[0137] Additionally included in the HVAC monitoring system 50 is a programable radio frequency transmitter 805 that receives input electrical power from the third reduced direct current voltage 825, the programable radio frequency transmitter 805 is operative to monitor for the second event marker signal 220 and when the second event marker signal 220 is received results in the programable radio frequency transmitter 805 outputting a third event marker signal 795 along a third communication 796, see FIGS. 3 and 6.

[0138] Further, a programable radio frequency receiver 780 that receives input electrical power from the second reduced direct current voltage 731, the programable radio frequency receiver 780 is operative to monitor the third event marker signal 795 and when the third event marker signal 795 is received results in the programable radio frequency receiver 780 outputting a fourth event marker signal 785 along a fourth communication 786, see FIG. 6. In addition, programable control circuitry 700 that receives input electrical power from the second reduced direct current voltage 731, the programable control circuitry 700 is in a ready state being operative to monitor for the fourth event marker signal 785 and when the fourth event marker signal 785 is received results in the control circuitry 700 outputting a fifth event marker signal 760 along a fifth communication 761, see FIG. 6.

[0139] Further included in the HVAC monitoring system 50 is a switching transistor 750 having a base connection, a collector connection, and an emitter connection, the base connection is in electrical communication with the fifth communication 761 and is operative to receive the fifth event marker signal 760 and when the fifth event marker signal 760 is received results in the collector connection and the emitter connection being placed from a transistor 750 open electrical communication state to a transistor 750 closed electrical communication state to facilitate electrical communication from the collector connection to the emitter connection, see FIGS. 5 and 6. Continuing, a normally closed electrical relay 225 that receives input electrical power from the first reduced voltage direct current 725 being a positive leg only to a primary terminal 228 of the normally closed electrical relay 225, wherein the first reduced voltage direct current 725 being compatible with the electrical power requirements of the existing HVAC control circuit board 371, See FIGS. 5 and 6.

[0140] The normally closed electrical relay 225 is also in electrical communication to the switching transistor 750 collector connection through a secondary terminal 229 on the normally closed electrical relay 225, the normally closed electrical relay 225 switched leg is disposed in electrical communication as between an existing HVAC control circuit board 371 fan relay output connector 375 and an existing HVAC fan/blower 85 motor 88 relay 89 resulting in operationally the normally closed electrical relay 225 controlling building 165 full voltage alternating current electrical power 830 to an existing HVAC fan/blower 85 motor 88 that results in the existing HVAC fan/blower 85 motor 88 being operational when the normally closed electrical relay 225 is in an un-activated operational state such that the normally closed electrical relay 225 is in a closed state, see in particular FIG. 5.

[0141] When the normally closed electrical relay 225 is in an activated operational state 226 from allowing electrical communication from the secondary terminal 229 to a negative ground of the first reduced voltage direct current 725 therethrough the collector connection to the emitter connection, resulting in the normally closed electrical relay 225 switched leg moving to an open state 226 resulting in the existing HVAC fan/blower 85 motor 88 being deactivated 91, see in particular FIG. 6.

[0142] As an option for the HVAC monitoring system 50, wherein the programable audio frequency sensor 810 can further include enhanced sensor structure for detecting the environment abnormal condition 60 that is selected from the group consisting of ambient temperature, smoke ionization, smoke optical, smoke photoelectric, catalytic combustible gas sensor for; natural gas, hydrogen, or propane, a carbon monoxide detector, or an ultraviolet infrared flame detector, for the environmental abnormal condition 60 as indicated by the enhanced sensor structure resulting in outputting the second event marker signal 220 along the second communication 230, see FIGS. 3 and 6.

[0143] Another option for the HVAC monitoring system 50, wherein the programable radio frequency receiver 780 through the third event marker signal 795 is programmed to filter frequencies of the third even marker signal 795 to only allow frequencies that have a high reliability for indicating the environmental abnormal condition 60 from the existing sensor 320, prior to the programable radio frequency receiver 780 outputting the fourth event marker signal 785 along a fourth communication 786, see FIG. 6.

[0144] A further option for the HVAC monitoring system 50, wherein the programable audio frequency sensor 810 is programmed to pair with the programmable radio frequency transmitter 805 with the programable audio frequency sensor 810 is programmed to measure peak frequency values within a selected range using a Fourier transform function to enable the programmable radio frequency transmitter 805 through the third event marker signal 795 to only transmit the selected range peak frequency values to the programable radio frequency receiver 780 to better have the programable audio frequency sensor 810 detect the environmental abnormal condition 60 as indicated by the existing sensor 320 that outputs the available first event marker signal 205, see FIG. 6.

[0145] Alternatively, for the HVAC monitoring system 50, wherein the selected range peak frequency values are programmed to be stored in a variable to help eliminate unintelligible values that were included in the selected range peak frequency values from the programable audio frequency sensor 810, resulting in modified selected range peak frequency values to further better have the programable audio frequency sensor 810 detect the environmental abnormal condition 60 as indicated by the existing sensor 320 that outputs the available first event marker signal 205, see FIG. 6.

[0146] Further, alternatively, for the HVAC monitoring system 50, wherein the programable radio frequency receiver 780 through the third event marker signal 795 is programmed to ignore repeated selected range peak frequency values of the third event marker signal 795 to prevent repeated erroneous selected range peak frequency values as contained within the second event marker signal 220 from the programable audio frequency sensor 810 when there was an absence of the first event market signal 205, see FIG. 6.

[0147] A method is disclosed for installing the HVAC monitoring system 50, that includes the steps of:

[0148] Providing the HVAC monitoring system 50 that includes providing the first electrical power supply 701, the second electrical power supply 815, the programable audio frequency sensor 810, the programable radio frequency transmitter 805, the programable radio frequency receiver 780, the programable control circuitry 700, the switching transistor 750, and the normally closed electrical relay 225 all as previously described in this specification.

[0149] Continuing with the installation of the HVAC monitoring system 50, with the further steps of;

[0150] Disconnecting the building electrical power 372, 373, 830 to the existing HVAC building system 65, see FIGS. 3 and 7.

[0151] Removing an existing fan door and an access panel of the existing HVAC building system 65 for access to the existing HVAC control circuit board 371 of the existing HVAC building system 65, see FIG. 7.

[0152] Locating the existing HVAC control circuit board 371 and in particular finding the existing HVAC control circuit board 371 fan relay output connector 375 that puts the existing HVAC control circuit board 371 fan relay output connector 375 in electrical communication 384 with an existing HVAC system fan motor relay 89, see in particular FIG. 3.

[0153] Disconnecting the existing HVAC fan 85 motor 88 electrical communication 384 as between the existing HVAC control circuit 371 board fan 85 relay 89 output connector 375 and the existing HVAC system 65 fan 85 motor 88 relay 89 to operationally force the existing HVAC fan 85 motor 88 electrical communication 384 through electrical communication 382 into the HVAC monitoring system 50, thus interrupting 376 the existing electrical communication 384 as between the existing HVAC control circuit board 371 fan 85 motor 88 relay 89 output connector 375 and the existing HVAC system 65 fan 85 motor 88 relay 89, see in particular FIG. 3.

[0154] Connecting the electrical communication 382 defined as Fan 1 from the existing HVAC control circuit board 371 fan 85 motor 88 relay 89 output connector 375 to an input connector 377 of the normally closed electrical relay 225, see FIGS. 3, 5, and 6.

[0155] Connecting the electrical communication 383 defined as Fan 2 from an output connector 381 of the normally closed electrical relay 225 to the existing HVAC system 65 fan 85 motor 88 relay 89, again see FIGS. 3, 5, and 6.

[0156] Locating the existing HVAC building system 65 fan door switch 81 that has two electrical communications 373, 378, identifying which of the two electrical connections 373, 378 is opposite of an electrical power feed electrical communication that is identified by tracing back the existing HVAC building system 65 building electrical power feed 106, 830, see FIGS. 3, 4, 5, and 6.

[0157] Splicing into the non-electrical power feed electrical communication 379 from the first locating step above for the fan door switch 81 with an electrical communication 379 defined as Hot 1 and connecting said Hot 1 to a building alternating current power Hot 1 input 106 on the HVAC monitoring system 50, see FIG. 3.

[0158] Locating the existing HVAC control circuit board 371 and specifically the existing HVAC building system 65 building electrical power feed 108, 830 on the existing HVAC control circuit board 371 for a neutral electrical power feed 380, see FIGS. 3, 4, 5, and 6.

[0159] Splicing into the existing HVAC control circuit board 371 for a neutral electrical power feed 372 with an electrical communication defined 380 as Neutral 1 and connecting Neutral 1 to a building alternating current power 830 Neutral 1 input on the HVAC monitoring system 50, see FIGS. 3 and 4. Wherein operationally, this allows the HVAC monitoring system 50 power input 106, 108 to be dependent upon the existing HVAC building system 65 fan door switch 81 that will deactivate the HVAC monitoring system 50 while simultaneously deactivating the existing HVAC control circuit board 371 if the existing HVAC building system 65 fan door is opened being for safety, if the existing HVAC building system 65 fan door is closed, then the HVAC monitoring system 50 will deactivate the existing HVAC building system 65 fan 85 only upon the environmental abnormal condition 60, see FIGS. 3 and 4.

[0160] If the environmental abnormal condition 60 does not exist, the HVAC monitoring system 50 allows the existing HVAC control circuit board 371 to control the existing HVAC building system 65 fan 85 normally, as the existing HVAC system 65 fan 85 motor 88 relay connection 375 on the HVAC control circuit board 371 is in direct electrical communication 382, 383 with the existing HVAC building system 65 fan 85 motor 88 relay, as the normally closed electrical relay 225 remains in a closed electrical state 92, 227, see FIG. 5, allowing the existing HVAC control circuit board 371 to control the existing HVAC building system 65 fan 85 normally, see FIGS. 3, 4, and 5.

[0161] Plugging in the second electrical power supply 815 to the building wall outlet 830 to supply the third reduced direct current voltage 825 to the programable audio frequency sensor 810 and the programable radio frequency transmitter 805, this is to operationally allow the programable audio frequency sensor 810 and the programable radio frequency transmitter 805 to be wirelessly remote from the first electrical power supply 701, the programable radio frequency receiver 780, the programable control circuitry 700, the switching transistor 750, and the normally closed electrical relay 225, see FIGS. 3, 4, 5, and 6.

[0162] Incorporation by reference into the specification for the three groups of source code as follows:

[0163] Source code—concurrently submitted as three ASCII text files; [0164] Files description: Source code for the code of the patent application relating to the programable radio frequency receiver 780, the programable radio frequency transmitter 805, and the relay 225. [0165] First source code file; [0166] Reference element number; programable radio frequency receiver 780 [0167] File name: ReceiverSC [0168] File Format: SourceCodeASCII [0169] File size (KB): 2 [0170] Pages 2 [0171] File creation date: May 7, 2022 [0172] Authors: Adam Roller, Kathryn Huonder, and Tariq Al Salmani [0173] Purpose: to filter out false positive values of frequency from the programable audio frequency sensor 810 to help prevent false activation 226 of the relay 225 [0174] Second source code file; [0175] Reference element number; programable radio frequency transmitter 805 [0176] File Name: TransmitterSC [0177] File Format: SourceCodeASCII [0178] File size (KB): 3 [0179] Pages 3 [0180] File creation date: May 7, 2022 [0181] Authors: Adam Roller, Kathryn Huonder, and Tariq Al Salmani [0182] Purpose: to measure peak frequency values within a selected range using a Fourier transform function to only transmit selected peak frequency values (to help eliminate unintelligible frequency values and repeated frequency values) to the programable radio frequency receiver 780 to better and more accurately detect the environmental abnormal condition 60 [0183] Third source code file; [0184] Reference element number; relay 225 [0185] File Name: RelayOutSC [0186] File Format: SourceCodeASCII [0187] File size (KB): 1 [0188] Pages 2 [0189] File creation date: May 7, 2022 [0190] Authors: Adam Roller, Kathryn Huonder, and Tariq Al Salmani [0191] Purpose: to manually test relay 225 activation 226 for existing HVAC building system 65 fan/blower 85 motor 88 disabling 91

CONCLUSION

[0192] Accordingly, the present invention of an HVAC monitoring system has been described with some degree of particularity directed to the embodiments of the present invention. It should be appreciated, though, that the present invention is defined by the following claims construed in light of the prior art so modifications or changes may be made to the exemplary embodiments of the present invention without departing from the inventive concepts contained therein.