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FilterLOCK Furnace and Air Conditioning Filter Seal air filter slot cover FilterLock® can be used with any 1 air filter to improve indoor air quality and reduce energy consumption · Sealing air leakageby-pass at the filter slotdoor airpods case with airtag slot This short consumer guide covers portable air cleaners and furnace or HVAC filters used in a home filter that your system fan and filter slot

air slot air filter's slot or frame Step 3: Round Down In this case, you'll want to round down to the nearest whole number to determine the nominal