Abstract: A baffle for a furnace of a heating, ventilation, and air conditioning (HVAC) system includes a mounting flange configured to be secured to a housing of the furnace. The baffle also includes a first panel extending from the mounting flange into an air flow path extending through the furnace and a second panel extending from the first panel toward the housing.

Abstract: A system includes a modulating furnace and control circuitry. The control circuitry is configured to receive a call for heating associated with a quick heat cycle. In response to the call for heating, the control circuitry is also configured to operate the modulating furnace in a quick heat operating mode for a threshold time period. Subsequent to the threshold time period, the control circuitry is also configured to operate the modulating furnace in a modulating heat operating mode.

Abstract: 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.

Abstract: A heating, ventilation, and/or air conditioning (HVAC) system includes a control system configured to initiate an operating cycle of a furnace of the HVAC system at an initial operating stage in response to a call for heating, monitor a duration of time associated with the operating cycle of the furnace to satisfy the call for heating, adjust the initial operating stage to provide an adjusted initial operating stage of the furnace based on the duration of time, and initiate a subsequent operating cycle of the furnace at the adjusted initial operating stage.

Abstract: A heat exchanger (e.g., a furnace) for a heating, ventilation, and/or air conditioning (HVAC) system includes a condensate pan having a first opening defined in a surface of the condensate pan. The condensate pan is configured to receive liquid condensate via the first opening, and the first opening comprises a first cross-sectional area. The furnace further includes a pocket comprising a wall circumscribing and defining a second opening. The second opening has a second cross-sectional area greater than the first cross-sectional area of the first opening of the condensate pan. The pocket is configured to be coupled to the surface of the condensate pan such that the wall of the pocket surrounds the first opening in the surface of the condensate pan.

Abstract: A furnace for a heating, ventilation, and air conditioning (HVAC) system includes a fuel valve configured to regulate an amount of fuel supplied to a burner of the furnace, a draft inducer blower configured to draw an air flow into the burner, and a controller configured to determine a target operating parameter value of the furnace, determine an air to fuel ratio corresponding to the target operating parameter value, and control operation of the fuel valve, the draft inducer blower, or both based on the air to fuel ratio.

Abstract: A baffle for a furnace of a heating, ventilation, and air conditioning (HVAC) system includes a mounting flange configured to be secured to a housing of the furnace. The baffle also includes a first panel extending from the mounting flange into an air flow path extending through the furnace and a second panel extending from the first panel toward the housing.

Abstract: A system includes a modulating furnace and control circuitry. The control circuitry is configured to receive a call for heating associated with a quick heat cycle. In response to the call for heating, the control circuitry is also configured to operate the modulating furnace in a quick heat operating mode for a threshold time period. Subsequent to the threshold time period, the control circuitry is also configured to operate the modulating furnace in a modulating heat operating mode.

Abstract: A variable capacity furnace includes a variable capacity fuel valve configured to supply a fuel to a burner, where the variable capacity fuel valve is configured to be controlled to a target setting over a range of settings to modulate an amount or flow rate of the fuel supplied to the burner. The variable capacity furnace also includes a control assembly having processing circuitry and memory circuitry. The memory circuitry includes instructions stored thereon that, when executed by the processing circuitry, cause the processing circuitry to execute a control algorithm to determine, based on whether an indoor temperature is progressing toward a set point over time and based on a temperature differential between the set point and the indoor temperature, a target setting of the variable capacity fuel valve. The instructions also cause the processing circuitry to control the variable capacity fuel valve to the target setting.

Abstract: A condensing heat exchanger system includes a first tube configured to receive a conditioning fluid, a second tube configured to receive the conditioning fluid from the first tube, a first vestibule panel coupled to the first tube, a second vestibule panel coupled to the second tube, and a drain trap assembly directly coupled to the second vestibule panel and configured to collect condensate.

Abstract: A heat exchanger (e.g., a furnace) for a heating, ventilation, and/or air conditioning (HVAC) system includes a condensate pan having a first opening defined in a surface of the condensate pan. The condensate pan is configured to receive liquid condensate via the first opening, and the first opening comprises a first cross-sectional area. The furnace further includes a pocket comprising a wall circumscribing and defining a second opening. The second opening has a second cross-sectional area greater than the first cross-sectional area of the first opening of the condensate pan. The pocket is configured to be coupled to the surface of the condensate pan such that the wall of the pocket surrounds the first opening in the surface of the condensate pan.