Generalaire / Reservepro 4551 MERV 11 20x25x5 Furnace Filter

Get The Generalaire / Reservepro 4551 MERV 11 20x25x5 Furnace Filter Delivered To Your Door

Our Generalaire / Reservepro 4551 MERV 11 20x25x5 Furnace Filter will provide you with the cleanest air your home has ever had. This product is a genuine Generalaire / Reservepro product, sourced directly from the manufacturer.

This furnace air filter replacement is shipped from Canada and is built for Canadian homes.

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"


  • Generalaire / Reserve 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

Indoor air quality is essential to our well being, and Canadians deserve a company that just gets it right. PureFilters was founded with a mission of making superior indoor air quality simple and affordable. PureFilters sources Generalaire furnace filters directly from the manufacturer, saving customers a ton of time and money.

Not sure when to change your furnace filter? Check out our guide on how often you should change your furnace filter.

Not sure which MERV rating you should choose? Check out our MERV rating comparison chart.

Not sure if this is the correct furnace filter size? Check out our guide on nominal vs actual filter size.

Why PureFilters is Canada's #1 furnace air filter company

From hassle free returns, to instant responses via chat/phone/email, our PureFilters team goes above the call of duty to keep your air fresh without the stress. Be sure to check out the PureFilters Blog - Use Tips and Information On Indoor Air Quality

If you need help and prefer to speak to someone, please feel free to contact us anytime!

Experience the cleanest air in your home today, without paying a premium price for it.

PureFilters - keeping your air fresh, without the stress.

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