A residential and commercial hot water and steam boiler safety system and device that includes at least one hollow pipe, with one plugged or sealed end and a fitting on the other end for connecting the pipe in a substantially vertical mounting position, and at least one two float switch disposed in the pipe and electrically connected in series with a limit switch in the boiler, where the pipe is adopted for the flow and accumulation of water, so that float switch activates as the pipe fills with water and shuts off the boiler by turning off the gas valve, promoting safer boiler and steam boiler operation. Additional float switches positioned above or below in the hollow pipe may provide additional functions, such as a warning light and sound to the owner, or a notification via a telephone or cell phone system or through the home network or Wi-Fi system.

A LWCO remote monitoring and diagnosing system or device features a signal processor configured to: receive signaling containing information for running a remote low water cut off (LWCO) mobile application, and also containing information about historical data related to a LWCO circuit that monitors and controls a burner of a boiler that opens and closes to provide water to the boiler depending on the water level in the boiler; and determine corresponding signaling containing information about the historical data requested based upon the signaling received.

A hot water supply system includes a hot water supply device which can be connected to an external communication network via a communication repeater, and a server. The server obtains, in pairing processing of associating a mobile terminal device which can remotely control the hot water supply device with the hot water supply device, identification information of a communication repeater to which the mobile terminal device is connected, and stores the identification information along with pairing information. Besides, the server performs control to determine conditions of the remote control based on whether the identification information of the communication repeater stored in association with the hot water supply device being a remote operation destination matches identification information of the communication repeater received from the mobile terminal device in the communication, when the communication of the remote control is received from the mobile terminal device.

An electrode boiler control apparatus includes a control circuit formed in an electrode boiler in which an intake electronic valve and an exhaust electronic valve in addition to an intake control valve and an exhaust control valve corresponding to air control valves formed at both sides of an upper portion of the electrode boiler, connected to the intake electronic valve and the exhaust electronic valve to control the intake electronic valve and the exhaust electronic valve; a current controller connected to a current transformer connected between electrode bars of the electrode boiler to control the current transformer; and a temperature controller connected to a temperature sensor formed on a hot water tank of the electrode boiler, and configured to control the temperature sensor and receive a temperature value measured by the temperature sensor.

The purpose of the present invention is to provide a condensing boiler employing an eco-friendly evaporation device, in which condensed water generated in a latent heat exchanger is removed by using the evaporation device, so that the condensing boiler can be installed in a site without a processing facility for discharging condensed water and contribute to energy saving. For implementation thereof, the present invention comprises: a blower (110) for supplying a supply-air; a sensible heat exchanger (140) for absorbing combustion sensible heat generated in a combustion chamber (130) by combustion by a burner (120); a latent heat exchanger (150) for absorbing latent heat of steam included in combustion gas which has finished heat exchange in the heat sensible exchanger (140); and an evaporation device (160) which absorbs condensed water generated in the latent heat exchanger (150), and has an evaporation type humidifier (161) for evaporating and removing the absorbed condensed water by using air supplied from the blower (110).

A residential and commercial sewerage, drainage and water disposal system and device that includes a ferrous metal cleanout plug and a pair of magnetic electrical connectors disposed in the cleanout plug, without being in physical contact with one another, where the magnetic electrical connectors are magnetically attached to the interior of the cleanout plug and retain in place an insulator plate, and where the electrical connectors are electrically connected with an alarm/control module capable of emitting and alarm and/or closing the main water supply shut off valve, so that the electrical connectors open or close an electric circuit when the fluid reaches the connectors and activates an alarm and/or and shuts off the water valve, promoting safer sewerage, drainage and water disposal system operation.

A residential and commercial sewerage, drainage and water disposal system and device that includes a ferrous metal cleanout plug and a pair of magnetic electrical connectors disposed in the cleanout plug, without being in physical contact with one another, where the magnetic electrical connectors are magnetically attached to the interior of the cleanout plug and retain in place an insulator plate, and where the electrical connectors are electrically connected with an alarm/control module capable of emitting and alarm and/or closing the main water supply shut off valve, so that the electrical connectors open or close an electric circuit when the fluid reaches the connectors and activates an alarm and/or and shuts off the water valve, promoting safer sewerage, drainage and water disposal system operation.

A residential and commercial hot water and steam boiler safety system and device that includes at least one hollow pipe, with one plugged or sealed end and a fitting on the other end for connecting the pipe in a substantially vertical mounting position, and at least one two float switch disposed in the pipe and electrically connected in series with a limit switch in the boiler, where the pipe is adopted for the flow and accumulation of water, so that float switch activates as the pipe fills with water and shuts off the boiler by turning off the gas valve, promoting safer boiler and steam boiler operation. Additional float switches positioned above or below in the hollow pipe may provide additional functions, such as a warning light and sound to the owner, or a notification via a telephone or cell phone system or through the home network or Wi-Fi system.

A water heater system includes a gas burner configured to selectively produce flue gases, and a heat exchanger for heating water in the water heater system. The water heater system is operable in a heating mode, and a standby mode. An exhaust assembly is in communication with the heat exchanger, and includes a condensate collector configured to receive the flue gases and condensate. A first temperature sensor is positioned to sense a temperature of the condensate within the condensate collector. The first temperature sensor is configured to detect a rate of temperature change of the condensate. A controller is configured to determine a leakage when the rate of temperature change adjusts from a first state to a second state when the water heater system is in the standby mode after the water heater system was in the heating mode.

An on-demand heater includes a plurality of heater banks disposed in series with one another between a heater fluid inlet and heater fluid outlet. Power to one or more of the heater banks is adjusted when a sensed exit fluid temperature from a heater bank differs from the partial fluid temperature increase assigned to that heater bank, such that the total desired fluid temperature increase is achieved at the heater fluid outlet in a controlled manner.