United Filter

Replacement Filter (3-Pack) for GeneralAire 4531 / 4556 ReservePro / 20x20x5 MERV 11 HVAC Air Filter — Exact Actual Size: 19-3/4" x 20-1/2" x 4-7/8"

$66.00
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Nominal Size: 20 x 20 x 5
Actual Size: 19-3/4 x 20-1/2 x 4-7/8
Part #: UFA-52020M11-3
MERV: 11
Case: 3 
Price: $89.99


Made in Canada
 
Frequently Asked Questions
  • Does this aftermarket filter replace genuine GeneralAire and ReservePro parts?
    Yes. This high-efficiency MERV 11 media filter is specifically engineered as a direct replacement for both the GeneralAire 4531 and the updated GeneralAire ReservePro 4556 factory models.
  • What is the exact physical size of this filter?
    The nominal size listed on the box is 20x20x5, but the exact actual dimensions are 19-3/4" x 20-1/2" x 4-7/8". Please measure your current filter cabinet to ensure a perfect fit.
  • How many filters come in one order?
    This item is sold as a 3-Pack (case of 3 filters total), allowing us to offer the lowest price per filter and keep your HVAC system stocked for the year.

Also Fits or Replaces:

Brand Air Cleaner Filter Part #
TRION AIR BEAR 229990-103
248713-103
435790-001
255149-003
 255649-103
455604-001
TRION AIR BEAR SUPREME 20x20
 455602-019
455604-001
459200-007
455602-225
455602-227
 455604-019
459200-005
255649-103
259112-103
TOTALINE P101-MF16
GENERALAIRE 4531
Mega-Mac
MAC2020
SOURCE 1 S1-MAC10202005 S1-FM10202005
SKUTTLE DB-20-20
DB-0020-020
 000-0448-003
448-3
ULTRAVATION 91-005

 

RELATED PRODUCTS

Air Filter Quality Rating Chart

When choosing the quality of air conditioning filter, consideration should be given to both the air pollution sources in your home as well as any allergy concerns your family may face.

How do you know your MERV? Find out.
Economy filter ECONOMY
Good filter GOOD
Customer Favorite!
Better filter BETTER
Best filter BEST
Economy Filtration Basic Allergy + Dust High Allergy + Dust Severe Allergy
Merv Rating 8 11 13 Commercial
Filter Effectiveness Up To
35% 		Up To
65% 		Up To
90% 		Up To
95%
Dust & Dust Mites✓✓✓✓
Pollen✓✓✓✓
Pet Dander✓✓✓✓
Mold Spores✓✓✓✓
Smoke✓✓✓✓
Fungus–✓✓✓
Viruses & Bacteria––✓✓
Odor Reduction–––✓

How To Choose an Air Filter

Wondering which air filter is right for you? Our easy-to-use filter comparison chart will help you figure out the best filter for your home. The higher the MERV Rating of the air filter you select, the more dust, allergens and irritants will be filtered out of your air. If you have pets and family members with asthma or allergies, you should select a higher quality filter. Additionally, if you live in a dusty or highly polluted area, you will want a filter that most effectively cleans your home's air. Indoor air pollution can be greatly reduced by selecting a higher quality air filter, which will effectively filter up to 95% of common pollution sources in the air your family breathes.

👉 Economy:

Our Economy furnace filter removes up to 35% of dust, dust mites, pollen, pet dander, mold and smoke from your air.

👉 Good:

Our Good furnace filter removes up to 65% of dust, dust mites, pollen, pet dander, mold, smoke and fungus from your air.

👉 Better:

Our Better furnace filter removes up to 90% of dust, dust mites, pollen, pet dander, mold, smoke, fungus and bacteria from your air.

👉 Best:

Our Best furnace filter removes up to 95% of dust, dust mites, pollen, pet dander, mold, smoke, fungus and even odors from your air.

WHO WE ARE UNITED FILTER

Proudly Canadian, United Filter delivers high-quality air filtration solutions for homes, businesses, and institutions. With a focus on performance, value, and sustainability, we’re trusted by HVAC professionals across North America.

united filter

❓Frequently Asked Questions

Overall rating: 5.0 / 5 from 2 reviews.

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Reviews

Arrived early and was nicely

"Arrived early and was nicely packaged."

— Daniel R. (5/5)

Service Service Service

"Amazing service, I get my Furnace filter from them for the last 2 or 3 years and they always sent me the right size. In my case fitres are different than standard dimensions. Good Job guys"

— Pierre L. (5/5)

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