Generalaire / Reservepro 4556 MERV 11 Furnace Filter 20x20x5

In most home environments, this filter only needs to be replaced every 3-4 months.

FITS THE FOLLOWING MODELS:

  • GeneralAire ReservePro 4531
  • GeneralAire Mega-Mac MAC2020
  • Totaline P101-MF16
  • Trion Air Bear 20x20