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actual size
  • Size Actual Dimension
  • 12x24x4 11.375" x 23.375" x 3.625"
  • 16x20x4 15.5" x 19.5" x 3.625"
  • 16x25x4 15.5" x 24.5" x 3.625"
  • 18x24x4 17.375" x 23.375" x 3.625"
  • 20x20x4 19.5" x 19.5" x 3.625"
  • 20x24x4 19.375" x 23.375" x 3.625"
  • 20x25x4 19.5" x 24.5" x 3.625"
  • 24x24x4 23.375" x 23.375" x 3.625"
  • 25x29x4 24.375" x 28.375" x 3.625"

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MERV 11 Filters Fast® 4" AC and Furnace Air Filters 3-pack

FF4M11

$70.95
Only $23.65 per Filter
Retail: $80.99 /ea
You Save: 12%
As low as
$70.95
Retail: $80.99
You Save: 12%
FF4M11 Sizes :
Ships in 1 to 2 business days.
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The Filters Fast® FF4M11 3-Pack is a set of MERV 11 filters that effectively reduce pollen, dust, pet dander, mold spores, dust mites and other allergens from indoor air. Removing these airborne particles can help improve allergies and alleviate sinus irritation that can cause watery eyes, itchy throat, coughing, and sneezing. The MERV 11 filter media is electrostatically charged and constructed with spun micro-fiber that also will not retain moisture, which can lead to microbial growth. Aside from the health benefits, these HVAC filters will also extend the life of your heating and cooling system by making it work more efficiently.

Filters Fast® FF4M11 3-Pack Filter Specifications:

  • Part Number: FF4M11
  • Pack Size: 3 Filters
  • MERV Rating: 11
  • Filter Type: Electrostatic pleated
  • Material: Synthetic
  • Replace every 6-12 months
  • For commercial and residential use
  • Note: These filters do not contain fiberglass.

The Filters Fast® FF4M11 3-Pack 4" Air Filter is available in the following sizes:

Nominal Size Actual Size Alternate Part Number
12x24x4 Air Filter 11.375x23.375x3.625 PF11.0412243PFF
16x20x4 Air Filter 15.375x19.375x3.625 PF11.0416203PFF
16x25x4 Air Filter 15.375x24.375x3.625 PF11.0416253PFF
18x24x4 Air Filter 17.375x23.375x3.625 PF11.0418243PFF
20x20x4 Air Filter 19.375x19.375x3.625 PF11.0420203PFF
20x24x4 Air Filter 19.375x23.375x3.625 PF11.0420243PFF
20x25x4 Air Filter 19.375x24.375x3.625 PF11.0420253PFF
24x24x4 Air Filter 23.375x23.375x3.625 PF11.0424243PFF
25x29x4 Air Filter 24.375x28.375x3.625 PF11.0425293PFF

NOTE: If you don't see your size, order a custom made air filter! Custom made air filters do not come individually wrapped. Please be advised that some larger filters require an additional cost (see dropdown window above).

Additional Resources:

For more information on air filter efficiency ratings, check out our resources below!

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Trustpilot

Customer Reviews:

Total Reviews: 22 | Average Rating: 4.8 / 5.0

Never have a problem, fast accurate and quality.

Collected by Trustpilot.com

Well worth ordering, efficient.

Collected by Trustpilot.com

Better filters than you can buy just about anywhere for this price. Fast service, fast shipping, good price. What more can you ask for?

Collected by Trustpilot.com

Quality is at least as good as anything at the big box stores, and price is better. It's a great value, and it makes responding to the message on my thermostat much easier having the filters on hand and available when needed.

Collected by Trustpilot.com

Fast friendly done

Collected by Trustpilot.com

Fast fast fast.

Collected by Trustpilot.com

A tad bit smaller than original but still fits

Collected by Trustpilot.com

Have used them for years and am well pleased. Reasonably priced.

Collected by Trustpilot.com

They work good so far

Collected by Trustpilot.com

great filters, just what I needed

Collected by Trustpilot.com

Great Company, thumbs up !!!!!!

Collected by Trustpilot.com

These are a great value for the money. The air quality is immediately better when we put them in.

Collected by Trustpilot.com

Nice filtration at a fair price

Collected by Trustpilot.com

Just didn't fit!

Collected by Trustpilot.com

Delivered on time just what I ordered

Collected by Trustpilot.com

I' ve been purchasing 4 inch filters for some time. Fast Filters is FAST at very low cost. Their ' packaging' for shipping leave a bit to be desired. Numerous times the filters arrived ' crushed' on one end or the other from shipping. To their credit, they have responded by replacing the damaged filters.

Collected by FiltersFast.com

Filters came fast and in good condition

Collected by FiltersFast.com

I ordered these filters, and about 4 days later, they were on my doorstep! They fit well, they filter the air well, and are an excellent value for what you pay.

Collected by FiltersFast.com

The filters are precisely sized, do an excellent filtering job and are long lasting. This is the second time I have ordered them from Filters Fast...

Collected by FiltersFast.com

I received my 3-pack of filters and they were just what i needed for my system at an afordable price which is about 1/2 of what i would have paid at lowes (the only big box store that carries that size filter in my town).

Collected by FiltersFast.com