*Please be advised that some larger filters require an additional cost (see dropdown window above).
- Size Actual Dimension
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12x24x4 11.375" x 23.375" x 3.625"
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16x20x4 15.5" x 19.5" x 3.625"
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16x25x4 15.5" x 24.5" x 3.625"
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18x24x4 17.375" x 23.375" x 3.625"
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20x20x4 19.5" x 19.5" x 3.625"
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20x24x4 19.375" x 23.375" x 3.625"
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20x25x4 19.5" x 24.5" x 3.625"
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24x24x4 23.375" x 23.375" x 3.625"
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25x29x4 24.375" x 28.375" x 3.625"
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Honeywell HPA300 True HEPA Whole Room Air Purifier
BioStrike CFF Ceiling Fan Air FilterThe Filters Fast® 4-inch Air Filters (FFM136) have a MERV 13 rating and are useful in a variety of settings, including homes, offices, and industrial sites. These MERV 13 filters effectively reduce pollen, dust, pet dander, mold spores, and dust mites, as well as bacteria, smoke, smog, and other allergens. The higher quality construction from these 4-inch filters benefits health and respiration, including alleviating problems with allergies and sinus irritation that might lead to itchy throat, watery eyes, coughing, and sneezing. 4-inch air filters are also more effective than thinner filters because their larger surface areas are much more durable. Filters Fast® air filters are affordable without sacrificing quality. These HVAC air filters arrive in a variety of sizes to meet your air quality needs.
Note: These filters do not contain fiberglass.
Specifications:
- Brand: Filters Fast®
- Part Number: FFM136, Ffm1362
- Pack Size: 3
- Filter Life: 6 - 12 months
- MERV Rating: 13
Available Sizes:
The 4" MERV 13 Furnace & AC Air Filters by Filters Fast® are available in the following sizes:
| Nominal Size | Actual Size | Alternate Part Number |
|---|---|---|
| 12x24x4 | 11.375x23.375x3.625 | PF13.0412243PFF, ffm136-12244 |
| 16x20x4 | 15.5x19.5x3.625 | PF13.0416203PFF, ffm136-16204 |
| 16x25x4 | 15.5x24.5x3.625 | PF13.0416253PFF, ffm136-16254 |
| 18x24x4 | 17.375x23.375x3.625 | PF13.0418243PFF, ffm136-18244 |
| 20x20x4 | 19.5x19.5x3.625 | PF13.0420203PFF, ffm136-20204 |
| 20x24x4 | 19.375x23.375x3.625 | PF13.0420243PFF, ffm136-20244 |
| 20x25x4 | 19.5x24.5x3.625 | PF13.0420253PFF, ffm136-20254 |
| 24x24x4 | 23.375x23.375x3.625 | PF13.0424243PFF, ffm136-24244 |
| 25x29x4 | 24.375x28.375x3.625 | PF13.0425293PFF, ffm136-25294 |
Please note that if you are unsure whether you need an actual or nominal size simply measure your air filter before placing your order.
Custom Sizes:
- If you don' t see your size, order a custom made air filter! Custom made air filters do not come individually wrapped.
How do you install the 4" MERV 13 Furnace & AC Air Filter by Filters Fast®?
- Once your air filters arrive, gather your supplies including a ladder (if needed,) safety goggles, gloves, a mask, and a disposable bag.
- Remove the metal grate from your air return.
- Carefully remove the used air filter and place it immediately and gently into the disposable bag. Then tie the bag sealed.
- Place the new air filter in place of the filter you just removed and replace the metal grille.
How often should you replace the 4" MERV 13 Furnace & AC Air Filter by Filters Fast®?
- Changing your 4" MERV 13 Furnace & AC Air Filter by Filters Fast® is a very quick and easy process that should be done once every six to twelve months.
What contaminants does the 4" MERV 13 Furnace & AC Air Filter by Filters Fast® reduce?
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The 4" MERV 13 Furnace & AC Air Filter by Filters Fast® is a MERV 13 air filter, which means that it reduces the following contaminants:
- Dust
- Pollen
- Mold Spores
- Bacteria
- Pet Dander
- Dust Mites
- Smoke & Smog
- Virus Carriers
- Other Common Airborne Allergens
Resources:
Compatible Parts:
The 4" MERV 13 Furnace & AC Air Filter by Filters Fast® - 3-Pack is the correct replacement for the following part numbers:
Customer Reviews:
Filters work really well controlling dust in the air.
Collected by Trustpilot.comI have been using merve 10 by another filter company for several years. I am trying the mere 13 from FiltersFast, and notice a marked difference throughout the house, less dust particles and cleaner air. I am very pleased with the better makeup of the FiltersFast frame since it is much sturdier than my previous company. Based upon my initial testing I will be upgrading to the merv13 from Filtersfast, great company, and products.
Collected by Trustpilot.comAlways top quality, perfect fit and great price and service.
Collected by Trustpilot.comI was so disappointed when they arrived. They are smaller than advertised, so air goes around the filter instead of through them.
Collected by Trustpilot.comSo far, so good. A bit pricey but great otherwise.
Collected by Trustpilot.comThe filters work great and the company has excellent customer service.
Collected by Trustpilot.comExcellent and have used for years.
Collected by Trustpilot.comExcellent results at a very reasonable cost.
Collected by Trustpilot.comWorks great.
Collected by Trustpilot.comI change out the filters once a month because I have my fan set to on. 24 hours a day and it gets very dirty.
Collected by Trustpilot.comVery good filters, but only 3.5", not 4". This leaves a void for air passage.
Collected by Trustpilot.comWe use nothing else but these!
Collected by Trustpilot.comEasy to order, got here quickly.
Collected by Trustpilot.comWorks perfect in my furnace--I will continue to buy this filter as needed.
Collected by Trustpilot.comBest filter on the market at an affordable price.
Collected by Trustpilot.comThese are really good and delivery was very quick.
Collected by Trustpilot.comGreat product but the price needs adjusted to a reasonable price.
Collected by Trustpilot.comIt is the best one can buy to protect our indoor air quality.
Collected by Trustpilot.comGood quality pproduct at a fair price.
Collected by Trustpilot.comGood for homes with asthma and pets
Collected by Trustpilot.comProduct Availability
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