Upgrade Furnace Filter Size 16x25x1 to 16x25x4

The 16x25x1 filter normally drops into a slot in the short horizontal run between the air intake downward duct and the furnace itself There

Home HVAC Filters & Accessories Price $ $ Product type Furnace Filter ; Furnace Slot Seal Filter Close menu Price $ $

furnace filter slot cover Protect Your Health and Home: FilterLock seals one inch furnace and AC filter slots to improve indoor air quality and reduce utility bills

hujantoto slot Contractor's Assistant: Did you check the furnace's filters? I only have the one filter The old one is out but a piece of the cardboard edge