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 method includes determining a first speed for an air circulation fan that corresponds with a temperature set point using a temperature map that maps temperatures to speeds of the air circulation fan and operating the air circulation fan at the first speed and a heating unit in a first configuration with at least one active burner from a plurality of burners where less than all of the burners are active when the heating unit is in the first configuration. The method further includes measuring a first temperature while operating the air circulation fan at the first speed, determining a temperature difference between the first temperature and the temperature set point, comparing the temperature difference to a temperature difference threshold, and updating the temperature map to map the first speed to the first temperature when the temperature difference is greater than the temperature difference threshold.

A movable fluid fuel heater to heat air and to introduce it into an environment to be heated. The heater includes a flow rate variator device for varying the flow rate of oxidizing air introduced in the combustion chamber by a forced ventilation device between a minimum flow rate value and a maximum flow rate value. The heater also includes a reference device comprising a plurality of reference values of a parameter representative of the pressure and a plurality of reference temperature values of the environmental air upstream of the combustion chamber. The reference device is configured to suggest an optimal setting value to set the flow rate variator device, at each pair of values formed by a value of the plurality of reference values of a parameter representative of the pressure and a value of the plurality of reference temperature values.

The present invention relates to a method of controlling a gas furnace that performs heating operation according to a heating signal formed of one of a weak heating signal and a strong heating signal. The method includes: (a) receiving the heating signal; (b) determining whether the heating signal is the weak heating signal or the strong heating signal; (c) calculating a certain weak heating capacity smaller than a maximum heating capacity of the gas furnace, when the heating signal is the weak heating signal; and (d) operating a weak heating of the gas furnace with the calculated certain weak heating capacity, wherein the step (c) includes calculating the weak heating capacity according to a difference between a temperature of air (hereinafter, an intake air temperature) sucked into the gas furnace and a reference temperature set based on the intake air temperature.

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.

The flameless heater system includes an energy source comprising a diesel engine configured to create volumes of air, a hydraulic system to control engine loading for heat generation and for air moving, and a control system, operatively coupled with the energy source and the hydraulic system to control at least one of a speed of the diesel engine, a loading of the diesel engine, or a fan speed.

A furnace system for a heating, ventilation, and air conditioning (HVAC) system includes a furnace controller configured to determine a rolling average furnace run time of the furnace system based on a plurality of previous run cycles of the furnace system. The furnace controller is configured to segment the rolling average furnace run time into a plurality of operational time periods, wherein each operational time period is associated with a distinct fire rate of a plurality of distinct fire rates the furnace system. The furnace controller is also configured to operate the furnace system to sequentially implement the plurality of distinct fire rates associated with the plurality of operational time periods.

A furnace system for a heating, ventilation, and air conditioning (HVAC) system includes a furnace controller configured to determine a rolling average furnace run time of the furnace system based on a plurality of previous run cycles of the furnace system. The furnace controller is configured to segment the rolling average furnace run time into a plurality of operational time periods, wherein each operational time period is associated with a distinct fire rate of a plurality of distinct fire rates the furnace system. The furnace controller is also configured to operate the furnace system to sequentially implement the plurality of distinct fire rates associated with the plurality of operational time periods.

A heating unit for a heating, ventilation and/or air conditioning (HVAC) system may have a first airflow path through the heating unit, a second airflow path through the heating unit, and a heater assembly having a first heating coil positioned within the first airflow path, a second heating coil positioned within the second airflow path, and a coil divider separating the first heating coil and the second heating coil.