4551
GeneralAire 4551 20x25x5 MERV 11 Cartridge Media Filter for MAC 2000
Replacement Filter Media. This filter has a MERV rating of 11. Approximate dimensions are 20 x 25 x 5.
Replace every 6 months if you have heating & cooling OR every 12 months if you only have heating. If you have a dusty environment or shedding pets you may need to replace your filter more often.
NOTE: This item replaces part 4501.
