A heating control system that includes a heating unit with a constant burner and a pulsed burner. The constant burner is configured to remain active during operation. The pulsed burner is configured to toggle between an active mode and an inactive mode. The heating control system further includes a memory operable to store a temperature map that maps temperatures to percentages of a period that the pulsed burner is active and a microprocessor operably coupled to the heating unit and the memory. The microprocessor is configured to transmit a first electrical signal to activate the constant burner, obtain a temperature set point, determine the percentage of the period that the pulsed burner is active using the temperature set point and the temperature map, and transmit a second electrical signal to toggle the pulsed burner based on the determination of the percentage of the period that the pulsed burner is active.

A heating control system including an air circulation fan, a heating unit, a memory, and a microprocessor. The microprocessor is configured to operate the air circulation fan at a first speed and the heating unit in a first configuration to achieve a first temperature rise where less than all of the burners are active. The microprocessor is further configured to compare the first temperature rise to a first temperature rise threshold and transition the air circulation fan to a second speed to achieve a second temperature rise when the first temperature rise is less than the first temperature rise threshold. The microprocessor is further configured to compare the second temperature rise to a second temperature rise threshold and transition the air circulation fan to a third speed when the second temperature rise is greater than the second temperature rise threshold.

A heating control system including an air circulation fan, a heating unit, a memory, and a microprocessor. The microprocessor is configured to operate the air circulation fan at a first speed and the heating unit in a first configuration where less than all of the burners are active. The microprocessor is further configured to determine a first temperature difference, compare the first temperature difference to a first temperature difference threshold, and transition the air circulation fan from the first speed to a second speed when the first temperature difference is less than the first temperature difference threshold. The microprocessor is further configured to determine a second temperature difference, compare the second temperature difference to a second temperature difference threshold, and transition the air circulation fan from the second speed to a third speed when the second temperature difference is less than the second temperature difference threshold.

An apparatus and method for controlling the heating of an airflow. According to certain embodiments, the temperature of an outdoor heat exchanger and the speed of a compressor are used to determine a blower speed for a variable speed indoor air blower. The selected blower speed may facilitate a flow of air across a second, indoor heat exchanger at an indoor volumetric flow rate that heats the airflow to a leaving air temperature. The leaving air temperature may at least seek to attain the temperature of a variable target leaving air temperature that is adjusted based on changes in outdoor ambient temperatures. Additionally, according to certain embodiments, the blower speed may be based on an indoor volumetric airflow rate that is determined, at least in part, on a determined system heating capacity and a temperature at the outdoor heat exchanger.

A hydronic air heater includes a frame assembly defining an enclosure, an inlet air damper formed in a wall of the enclosure and providing a means of ingress for ambient air, a closed heat transfer loop disposed within the enclosure, and a blower assembly disposed within the enclosure. The heat transfer loop includes a boiler for heating a fluid, a pump for circulating the fluid within the loop and a heating coil for receiving the heated fluid from the boiler. The blower assembly is configured to draw air into the enclosure through the inlet air damper and through the heating coil whereby heat from the fluid within the heating coil is transferred to the air.

An environmental control system for controlling environmental conditions within an open interior of an agricultural building includes a main controller, and a plurality of zone systems. Each zone system is configured to control environmental conditions within one of a plurality of zones within the open interior, and includes at least one environmental control device, a temperature sensor configured to output a temperature signal indicating a temperature within the zone, and a smart hub configured to control the at least one environmental control device of the corresponding zone based on low and high setpoint temperatures for the zone issued by the main controller and the temperature signal issued by the temperature sensor of the zone. The main controller is configured to prevent activation of an environmental control device in one of the zones by the smart hub based on an operating condition of an environmental control device in another zone.

An environmental control system for controlling environmental conditions within an open interior of an agricultural building includes a main controller, and a plurality of zone systems. Each zone system is configured to control environmental conditions within one of a plurality of zones within the open interior, and includes at least one environmental control device, a temperature sensor configured to output a temperature signal indicating a temperature within the zone, and a smart hub configured to control the at least one environmental control device of the corresponding zone based on low and high setpoint temperatures for the zone issued by the main controller and the temperature signal issued by the temperature sensor of the zone. The main controller is configured to prevent activation of an environmental control device in one of the zones by the smart hub based on an operating condition of an environmental control device in another zone.

For the automated adjustment of a heating system (2), there is produced between an exhaust-gas measuring device (1) and a control unit (26) a data connection (6) via which data, measurement values or control or setting signals for the adjustment of the heating system (2) are transmitted at least from the exhaust-gas measuring device (1) to the control unit (26). During the adjustment of the heating system (2), at least one exhaust-gas parameter is measured in automated fashion by way of at least one exhaust-gas sensor (4) of the exhaust-gas measuring device (1), and determined measurement values are automatically detected by the exhaust-gas measuring device (1). Then, a deviation of the determined measurement value from an exhaust-gas-parameter-specific and/or installation-specific setpoint value is determined, and in a manner dependent on the determined deviation, an automated adjustment of the heating system (2) is performed, said adjustment being initiated by the control unit (26) (cf. FIG. 1).

An air conditioning system includes a heat pump section performing indoor air-warming by using a vapor-compression refrigeration cycle, a separate heat source section performing indoor air-warming by using a heat source separate from the heat pump section, and a control unit configured to control actions of the heat pump section and the separate heat source section. When an operation is switched from a separate heat source air-warming operation to a heat pump air-warming operation, the control unit starts the heat pump air-warming operation while the separate heat source air-warming operation is continued, and after an overlapping air-warming ending condition is met, the control unit ends the separate heat source air-warming operation. The overlapping air-warming ending condition is that a temperature difference resulting from subtracting a target indoor temperature from an indoor temperature is equal to or greater than an overlapping air-warming ending air temperature difference.

In accordance with the principals of the present invention, a furnace unit adapted to be installed in-line with a fuel source of a furnace modulates natural gas or propane to reduce fuel consumption, minimize temperature overshoot, and reduce furnace short cycling. A modulator is contained with the furnace unit. The modulator is in gaseous communication with the in-line gas fuel source. A furnace sensor senses furnace criteria related to the operation of the furnace. A microcontroller receives from the furnace sensor furnace criteria and controls the modulator based on the furnace criteria. In a further aspect of the invention, an environmental sensor can be provided to sense environmental criteria related to the operation of the furnace. In a further aspect of the invention, a base unit in electrical communication with the furnace unit can be provided, the base unit determining energy consumption usage and savings. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.