3M Filtrete 4" Furnace Filters

Shipping Details
Order Subtotal Shipping & Handling Promotional Shipping
$0 - $29.99 $5.99
$30 - $59.99 $9.99
$60 - $89.99 $11.99
$90 - $119.99 $12.99
$120 - $149.99 $14.99
$150 - $199.99 $19.99 Free Promotional Shipping!
$200 - $299.99 $24.99 Free Promotional Shipping!
$300 - $399.99 $29.99 Free Promotional Shipping!
$400+ $39.99 Free Promotional Shipping!

*Free shipping on orders over $150 to the continental United States. Customers are responsible for all shipping costs on orders for Hawaii, Alaska, and Canada. Most orders ship via UPS or US Postal Service. Most orders are shipped to Canada via USPS. Please keep in mind that our rates include the cost of shipping, handling, and packaging. If you return your order, we do not refund the initial ground or promotional shipping costs.


Buy 3M Filtrete 4 Inch Furnace Filters
Show all 3M Filtrete 4 Inch Furnace Filters

3M 4" Furnace Filters

The 3M 4" Media Furnace Filter provides Filtrete performance for use in whole house air cleaners installed in furnaces or central air conditioners. These filters work in any whole house system that takes a 4" filter. Filtrete furnace filters capture mold spores, pollen, dust, dust mite allergen, and pet dander. They help rid your home of these common allergy triggers and help to keep the air in your home cleaner all year round. When used under normal conditions, replace every year.

3M Media Air Cleaner filters are a universal style filter that will fit a variety of brands and models. With consist air filtration, these 4" media air cleaner filters are an excellent way to keep your home cleaner with less expense.

*Please note that the actual width may be up to 4.1875 inches.

3M 4" Furnace Filter Features

  • 1550 MPR provides exceptional performance and ensures clean indoor air for you and your family.
  • Electrostatic filtration attracts and captures particles to remove allergens from your home environment.
  • Captures 97% of airborne allergens and particles.
  • Continuously combats polluted indoor air. Filtrete furnace filters capture bacteria, viruses, smog, and smoke as well as other allergens.
  • Will not support the growth of mold or bacteria.
  • These media air cleaner filters are designed to fit a variety of air cleaner models and brands.

What Do These Furnace Filters Fit?

20x20x4 - Designed to fit Honeywell Media Air Cleaners
16x25x4 - Designed to fit Honeywell & Trion Air Bear Media Air Cleaners
20x25x4 - Designed to fit AprilAire / Space-Gard 2200 & 2250, Honeywell and Trion Air Bear Media Air Cleaners

Product Reviews

Write A Review
  Black Mold
Reviewed by: Russell from West Chester, Pennsylvania

I'm very allergic to Black Mold. These 4" filters suck up and trap the nasty little spores like a sponge. Living in a Condo unit that is partially underground, humidity control and constant filtration are very important. This filter is being used 24/7 and must be changed sooner than 1 year but I won't use anything else. AchooAllergy.com has great prices and super fast shipping. I was very pleased to find the filter packaged well and damage free when it arrived.

Customer Q & A

Q1: Which way is the air flow?
A: There are indicator arrows on each filter to show you how to install it, but if you cannot read them for any reason, remember, the side that has the metal mesh, is where air exits. Hope that helps!

Q2: Should I ryn the fan continuously to get the most filtration? Any idea the impact on the electric bill? Thanks

A: This is a tough question. There's a bit of a balancing act between electric usage and air filtration. Running the fan continuously would likely run you about $20 more per month. That's $250 a year. This is just an estimate since I don't know the blower motor size or draw and don't know what electric costs per kWh where you are located. The flipside of this is that the filtration is only helping when the blower is actually on. My first thought is no, don't run it continuously. I don't know if they extra use/wear and tear on the blower motor and bearings plus the actual extra energy usage is worth it. I would likely suggest you try it one month and see how it works. Check your electric bill to determine what day your billing cycle starts on, then turn on continuous. You'll have a very good idea of the extra cost, and it shouldn't be too much more expensive. That is bit of a roll of the dice since electric rates can vary from over 20 cents per kWh to less than 10. I would also say. The other potential downside is depending on where you are located, you may not want the blower moving around air that isn't being warmed. The more I type, the more I feel like I'm talking you and myself out of this! In any event, those are a few things to consider, and again, trying it for a month would give you a good idea as to whether you notice a difference in air quality and what kind of impact it will have on the power bill. Hope that helps!

Q3: We currently use a Carrier electrostatic air cleaner. The two side-by-side collectors total 20"x25" by 5" thick. Would it be feasible just to replace the collectors with one 20'x25" Filtrete 1550 air filter, or do we need to replace the entire unit?

A: You could try the Filtrete filters, and they'll certainly do better than nothing. Though I'm not sure of the exact model you're describing, the Filtrete should work as a replacement. The part I'm unsure about is if your model sends a charge through the filters, and that raises two questions for me. I'm unsure if when used with their handy dandy electrocution technology, would they present any type of hazard? I would guess not but I do not know that for sure. Secondly, does that unit product any ozone or does Carrier publish that. I would assume it's below CARB standards, but again, I'm not sure. Long term, if you don't plan on continuing to purchase their filters, it might be easier for you to just remove the unit and install a housing that would fit a 4" filter, like the Filtrete. They allow adequate airflow, and like all Filtrete filters, they are electrostatic by nature, so with that slight charge, they do a good job of drawing particles in and holding them without any additional filtration features. Sorry for the delay and hope that helps!

Read all Q & A

Ask a Question Ask a Question
Do you have a question about this product? Ask a Product Expert! The answer will be emailed to you and posted for the benefit of other shoppers.

Additional Resources

Furnace Filter Buying Guide
Learn more about how to control mold.
Read more about how to control dust mites.

Filtrete 4" Furnace Filter Availability

16 x 25 x 4 (Item#: 3M0072) $29.95
20 x 20 x 4 (Item#: 3M0073) $29.95
20 x 25 x 4 (Item#: 3M0074) $29.95

Could not wait to try Safeguard Window Filters. I am using them, am very pleased and have high hopes that my solution to open windows is at hand!
More Testimonials