This HVAC furnace safety switch is built to withstand the thermal cycling common in residential gas furnaces

maintaining OEM performance standards for Rheem and Ruud equipment

This adjustability ensures the system maximizes the use of warm return air from the plenum before energizing the reheat coils

This orifice is factory-drilled to 1

allowing for continued furnace operation

Lochinvar & A.O. Smith 100233489 Ventilation Fan 30067439-890 This HVAC furnace safety switchThe Lochinvar & A. O. Smith 100233489 Ventilation Fan is a critical OEM replacement component designed for high efficiency boiler and water heater combustion systems. This axial fan assembly, also identified by part numbers FAN2027 and FAN2027K, operates on 115VAC power at 50 60Hz. As a veteran grade ventilation fan replacement, it facilitates the precise movement of air into the combustion chamber while ensuring the safe extraction of flue gases.