Generalaire / Reservepro 4551 MERV 11 Furnace Filter 20x25x5

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

Actual size 19-5/8" x 24-3/16" x 4-15/16"

FITS THE FOLLOWING MODELS:

  • Generalaire / Reservepro 4501
  • GeneralAire GF-2025, GF-GAFB2832, GF-GAFB2843, Mega-Mac MAC2000, MAC-L
  • Lennox BMAC-20C, MAC-10, MF1-20
  • Source1 S1-MAC10202505
  • Totaline P101-MF20
  • Trion Air Bear 2000
  • York S1-MAC10202505