EnviroSeptair filter collector pads (package of 12) for EnviroseptFurnacePanelHVACair purifier model EAF-1621 (Panel NOT included) . Exact size of each pad is 14 inches by 18.0 inches. The size of the exact filter insert of the Envirosept Model 1621 is 15.5 x 20.5 inches x 1 inch. Each filter change uses two replacement pads unless you remove the dirtier pad and replace it with the cleaner one. Replace filter pads monthly or more often if your home or business requires it.
Note: Measure the panel insert including the black plastic piece to get accurate dimensions of your Envirosept insert. Replacement furnace filter pads cover only the inside mesh part of the furnace air cleaner panel. Replacement furnace filters are made from a custom polywool blend of proprietary fibers without latex or adhesives. We suggest a label on your furnace to remind you of the size.
To Replace Furnace Filters: Unplug the unit. Remove furnace filter panel from the slot. Open the two retaining clips. Remove both filters. If desired, move the less dirty filter to where the dirtier filter was. Add second filter. Push the clips closed, slide panel into slot and plug in.