Generalaire GA 4556 - 20x20x5 MERV 11

4556 20x20x5 MERV 11 Furnace Filter (Actual Size: 19-3/4" x 20-5/8" x 4-15/16")
 

This is an authentic GeneralAire #4556 (previously #4531) ReservePro 20x20x5 MERV 11 pleated air filter that traps airborne particles as small as 1.0 micron. GeneralAire recommends you replace this air filter every 6 months to achieve optimal results.
 

These 20x20x5 high-efficiency media air filter can be used in air cleaner cabinets of the following makes and models:

• GeneralAire Mega-Mac MAC2020
• Totaline P101-MF16
• Trion Air Bear 20x20 435790-029, Air Bear Supreme 20X20 455604-001, 455604-019