Measuring an exact 19-3/4" x 21" x 3/8"

this is an authentic OEM replacement part

this specific part number is engineered for the Ultra Gas Boiler line (specifically Series 1 and 2)

Is this filter compatible with the activated charcoal stage

Lochinvar & A.O. Smith 100108424 Thermostat 322027-701 Measuring an exact 19-3/4" xThe Lochinvar & A. O. Smith 100108424 Lower Thermostat is a technician grade OEM replacement part designed specifically for electric water heaters requiring precise thermal regulation. This WH9 6 single element heater thermostat features an integrated Energy Cut Off (E. C. O.) high limit switch, providing critical safety by disconnecting power if tank temperatures exceed safe operational parameters. Engineered as a surface mount control, it ensures