If the area surrounding your filter isn't completely sealed, air can be

website furnace filter slot The size of your home, size of individual rooms and size of your HVAC filter slot can all come into play when it comes time to buy new air filters furnace filter slot Cut out the 1in slot and change to 4in slot Any side effect of doing this to the HVAC motor? No negatives Any tips on how to perform the job

furnace filter slot Patented two-piece system designed for use with 1-inch air filters; Eliminates air leakage at the filter slotdoor to improve indoor air quality  Furnace Filter Direction? How to Replace Furnace Filter · Furnace Filter Slot Cover: Easy Fix to HVAC Air Leak · Indoor Unit Will Not Turn Off: Why Does My  Furnace filter slot cover that is an easy fix to HVAC air leaks Here's the link to AllergyZone

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