Lochinvar & A.O. Smith 100188878 Fan Assembly 322056-301 This HVAC induction pressure switch

This HVAC induction pressure switch comes with a standard 1/4" barb connection

Once the unit cools to 130°F (Closed)

Optimized Combustion: The integrated #30 orifice provides the correct BTU input for natural gas configurations to maximize system efficiency

This snap-action HVAC furnace limit switch features a compact footprint and standard mounting orientation

This HVAC blower wheel replacement measures 11 inches in diameter with a 10-inch width and utilizes a 1/2-inch bore diameter with a secure set-screw attachment

Lochinvar & A.O. Smith 100188878 Fan Assembly 322056-301 This HVAC induction pressure switchThe Lochinvar & A. O. Smith 100188878 Fan Assembly is a critical OEM replacement component engineered specifically for the FTX500 series high efficiency boilers. Designed to maintain precise combustion air ratios, this heavy duty blower ensures optimal airflow for FTX500L and FTX500N models. As a veteran technician knows, maintaining the correct static pressure within the combustion chamber is vital for system longevity and peak thermal efficiency.