Lochinvar & A.O. Smith 100233577 Filter 321894-708 ensuring the damper plate defaults

ensuring the damper plate defaults to its safe position during a power loss to prevent uncontrolled air circulation

Can this diaphragm be used in both NC (Normally Closed) and NO (Normally Open) setups

making it an ideal choice for condenser fan cycling and high-side pressure management

fitting the same footprint for seamless field upgrades

Common Questions & Technical Support Is the time relay adjustable on this model

Lochinvar & A.O. Smith 100233577 Filter 321894-708 ensuring the damper plate defaultsMaintaining clear intake pathways is critical for high efficiency operation, and the Lochinvar & A. O. Smith 100233577 Filter is the professional grade solution for preventing debris from fouling the heat exchanger. This 1" x 12" x 12" heavy duty air filter kit is specifically engineered for compatibility with a wide range of Lochinvar and A. O. Smith boiler and water heater models, including the Crest (CBL, CBN) and Copper Fin (CHL, CHN) series. As