How to Find the Right HVAC Filter Size

Furnace filter fit problem - HVAC-Talk furnace filter slot The FilterLOCK covers and seals the standard 1” furnace filter slots The overlapping two-piece design allows for filter slots measuring up to 25” in width furnace filter slot cover FilterLock can be used with any 1 in air filter to improve indoor air quality and reduce energy consumption The patented, 1-size-fits-all product

lucky888 slot It could be that the cabinet is set up to accept a one inch or two inch filter You would have to remove the side tracks to insert a two inch