Aprilaire #813 High Efficiency Filtering Media? – MERV 13

This highly efficient filter media fits common 20″?X?25″?Air Cleaners after they have been upgraded using the Aprilaire 4897 Upgrade Kit.?? This kit upgrades air cleaner cabinets from Carrier, Honeywell, Lennox, Ultravation, General, Trion, and others.

NOTE:??This filter can only be used?after?your air cleaner is upgraded using the?4897?rails!

Benefits:

• Removes Mold Spores, Pollen, Dust Mites, Bacteria, Smoke from your air
• Descreases the amuont of contanminants which can cause sinus irritation, allergic reactions and asthma attacks
• Increases the life of your heating and cooling system
• Helps your heating and cooling system save energy by running at peak efficiency
• Filter change is fast and simple
• Filter “self-sealing” ends eliminates filter blow by
• Collapsible filter protected from damage? – a common problem with large “box” filters
• Saves space in your cramped mechanical room!? Compare collapsed dimensions of 4-1/4″?X?4-3/4″?X?27″ with 20″?X?25″?X?5″!!

Replaces the following: