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

This is the manufacturer-recommended direct replacement

Optimized Performance: Engineered for a premix design that stabilizes the flame and reduces nitrogen oxide (NOx) emissions

engineered to meet or exceed current efficiency mandates

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

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.