Furnace Air Filters - Heating, Cooling & Ventilation

If you have a 2” or a 4” filter slot, using a filter with a higher Merv rating will be less of a concern, as the higher surface area of a thicker filter causes

The Filter Slot Seal is ideal for any furnace, air conditioner or air cleaner filter Based on recommendations by the Department of Energy, you should cover

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

mini slot drain Locate the air filter slot on the HVAC unit · Turn Unit Off · Remove old filter · Insert new air filter · Turn the unit back on