Lochinvar & A.O. Smith 100233577 Filter 322838-754 The MTZ series uses polyolester

The MTZ series uses polyolester (POE) oil for HFC refrigerants like R404A or R134a

the 320720-756 ensures structural integrity and optimal thermal conductivity

making it ideal for large boilers and commercial water heaters

ideal for high-pressure natural gas or LP applications

Smith 100208515 Ignition Module is a critical direct spark ignition (DSI) control engineered for high-recovery commercial water heaters and residential boilers

Lochinvar & A.O. Smith 100233577 Filter 322838-754 The MTZ series uses polyolesterMaintaining 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