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HOW OFTEN SHOULD YOU ACTUALLY CHANGE YOUR AIR FILTER?
The rule of thumb for pleated filters is to change them every 3 months, but this is often not enough. Answer a few questions to find out how often you should actually be changing your air filters.
About how often do you run your HVAC system?
Most of the time
About half the time
Rarely
I'm Not Sure
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DOES ANYONE IN YOUR HOUSEHOLD HAVE ALLERGIES AND/OR ASTHMA?
Yes
No
Back
DO YOU HAVE ANY PETS?
Yes
No
Back
WHAT KIND OF AIR FILTER DO YOU NORMALLY BUY?
Fiberglass
Pleated
Whole House Filter
I'm Not Sure
Back
YOUR RESULTS
Based on your answers we recommend that you
to maintain the best air quality and the life of your HVAC system.
Learn More
If you run your HVAC system often, you'll need to change your filter more frequently because dust will quickly accumulate.
Asthma/Allergies
Learn More
Those with asthma and/or allergies are more sensitive to airborne particles. Changing your filter more often will ensure indoor air quality is at its best.
Pets
Learn More
Pets bring extra dust, dander, and odors into your home. Keep the air in your home clean and smelling fresh by changing the filter more often.
Save more when you buy in bulk
Purchase filters for a years supply and sign up for text reminders so you can Breath Freely™ all year long.
Filterbuy is proud to offer the largest selection of pleated air filters at the lowest price.
To get started, choose your filter size below
- 6 7/8 x 15 7/8 x 1
- 8x14x1
- 8x16x1
- 8x20x1
- 8x24x1
- 8x30x1
- 9x30x1
- 9.75x23.75x1
- 10x10x1
- 10x14x1
- 10x15x1
- 10x16x1
- 10x18x1
- 10x20x1
- 10x24x1
- 10x25x1
- 10x28x1
- 10x30x1
- 11.25x11.25x1
- 11.25x19.25x1
- 11.25x23.25x1
- 11.5x21x1
- 11.88x16.88x1
- 12x12x1
- 12x15x1
- 12x16x1
- 12x18x1
- 12x20x1
- 12x22x1
- 12x24x1
- 12x25x1
- 12x26x1
- 12x26.5x1
- 12x27x1
- 12x30x1
- 12x30.5x1
- 12x34x1
- 12x36x1
- 12.5x21x1
- 12.75x21x1
- 13x18x1
- 13x20x1
- 13x21x1
- 13x21.5x1
- 13x24x1
- 13x25x1
- 13.25x13.25x1
- 14x14x1
- 14x18x1
- 14x20x1
- 14x22x1
- 14x24x1
- 14x25x1
- 14x27x1
- 14x28x1
- 14x30x1
- 14x36x1
- 14.5x19x1
- 15x15x1
- 15x20x1
- 15x25x1
- 15x30x1
- 15x30.5x1
- 15x30.75x1
- 15.25x15.25x1
- 15.5x29x1
- 16x16x1
- 16x18x1
- 16x20x1
- 16x21x1
- 16x21.5x1
- 16x22x1
- 16x22.25x1
- 16x24x1
- 16x25x1
- 16x30x1
- 16x32x1
- 16x36x1
- 16.25x21.25x1
- 16.38x21.38x1
- 16.38x21.5x1
- 16.5x21x1
- 16.5x22x1
- 17x17x1
- 17x19x1
- 17x20x1
- 17x21x1
- 17x22x1
- 17x25x1
- 17.25x17.25x1
- 17.25x19.25x1
- 17.25x23.25x1
- 17.25x26x1
- 17.25x29.25x1
- 17.25x35.25x1
- 17.5x22x1
- 17.5x23.5x1
- 17.5x27x1
- 18x18x1
- 18x20x1
- 18x22x1
- 18x24x1
- 18x25x1
- 18x30x1
- 18x36x1
- 18.25x22x1
- 19x19x1
- 19x21x1
- 19x21.5x1
- 19x22x1
- 19x23x1
- 19x27x1
- 19.25x21.25x1
- 19.25x23.25x1
- 19.5x21x1
- 19.5x22x1
- 19.75x21x1
- 19.75x22x1
- 19.88x21.5x1
- 20x20x1
- 20x21x1
- 20x21.5x1
- 20x22x1
- 20x22.25x1
- 20x23x1
- 20x24x1
- 20x25x1
- 20x27x1
- 20x30x1
- 20x32x1
- 20x34x1
- 20x36x1
- 21x21x1
- 21x22x1
- 21x23x1
- 21x23.25x1
- 21.25x21.25x1
- 21.5x23x1
- 21.5x23.25x1
- 21.5x24x1
- 21.5x26x1
- 22x22x1
- 22x24x1
- 22x26x1
- 22x28x1
- 22x36x1
- 22.25x25x1
- 23x25x1
- 23.25x29.25x1
- 23.5x23.5x1
- 23.5x25x1
- 23.5x30.75x1
- 24x24x1
- 24x25x1
- 24x28x1
- 24x30x1
- 24x36x1
- 25x25x1
- 25x28x1
- 25x29x1
- 25x32x1
- 27x27x1
- 28x30x1
- 29x29x1
- 30x30x1
- 30x32x1
- 30x36x1
- 6.88x15.88x2
- 8x14x2
- 8x16x2
- 8x20x2
- 8x24x2
- 8x30x2
- 9.75x23.75x2
- 10x10x2
- 10x14x2
- 10x15x2
- 10x16x2
- 10x18x2
- 10x20x2
- 10x24x2
- 10x25x2
- 10x30x2
- 11.25x11.25x2
- 11.25x19.25x2
- 11.25x23.25x2
- 11.5x21x2
- 12x12x2
- 12x15x2
- 12x16x2
- 12x18x2
- 12x20x2
- 12x22x2
- 12x24x2
- 12x25x2
- 12x26x2
- 12x26.5x2
- 12x27x2
- 12x30x2
- 12x30.5x2
- 12x36x2
- 12.5x21x2
- 12.75x21x2
- 13x18x2
- 13x20x2
- 13x21x2
- 13x21.5x2
- 13x24x2
- 13.25x13.25x2
- 14x14x2
- 14x18x2
- 14x20x2
- 14x22x2
- 14x24x2
- 14x25x2
- 14x27x2
- 14x28x2
- 14x30x2
- 14x36x2
- 14.5x19x2
- 15x15x2
- 15x20x2
- 15x25x2
- 15x30x2
- 15x30.5x2
- 15x30.75x2
- 15.25x15.25x2
- 16x16x2
- 16x18x2
- 16x20x2
- 16x21x2
- 16x21.5x2
- 16x22x2
- 16x22.25x2
- 16x24x2
- 16x25x2
- 16x30x2
- 16x32x2
- 16x36x2
- 16.25x21x2
- 16.25x21.25x2
- 16.38x21.38x2
- 16.5x21x2
- 16.5x22x2
- 17x17x2
- 17x19x2
- 17x20x2
- 17x21x2
- 17x22x2
- 17x25x2
- 17.25x17.25x2
- 17.25x19.25x2
- 17.25x23.25x2
- 17.25x26x2
- 17.25x29.25x2
- 17.25x35.25x2
- 17.5x23.5x2
- 17.5x27x2
- 18x18x2
- 18x20x2
- 18x22x2
- 18x24x2
- 18x25x2
- 18x30x2
- 18x36x2
- 18.25x22x2
- 19x19x2
- 19x21x2
- 19x21.5x2
- 19x22x2
- 19x23x2
- 19x27x2
- 19.25x21.25x2
- 19.25x23.25x2
- 19.5x21x2
- 19.5x22x2
- 19.75x21x2
- 19.75x22x2
- 19.88x21.5x2
- 20x20x2
- 20x21x2
- 20x21.5x2
- 20x22x2
- 20x22.25x2
- 20x23x2
- 20x24x2
- 20x25x2
- 20x27x2
- 20x30x2
- 20x32x2
- 20x34x2
- 20x36x2
- 21x21x2
- 21x22x2
- 21x23x2
- 21x23.25x2
- 21.25x21.25x2
- 21.5x23x2
- 21.5x23.25x2
- 21.5x24x2
- 21.5x26x2
- 22x22x2
- 22x24x2
- 22x26x2
- 22x28x2
- 22x36x2
- 22.25x25x2
- 23x25x2
- 23.25x29.25x2
- 23.5x23.5x2
- 23.5x25x2
- 24x24x2
- 24x25x2
- 24x28x2
- 24x30x2
- 24x36x2
- 25x25x2
- 25x28x2
- 25x29x2
- 25x32x2
- 27x27x2
- 28x30x2
- 29x29x2
- 29x30x2
- 30x30x2
- 30x32x2
- 30x36x2
- 6.88x15.88x4
- 8x14x4
- 8x16x4
- 8x20x4
- 8x24x4
- 8x30x4
- 9.75x23.75x4
- 10x10x4
- 10x14x4
- 10x15x4
- 10x16x4
- 10x18x4
- 10x20x4
- 10x24x4
- 10x25x4
- 10x30x4
- 11.25x11.25x4
- 11.25x19.25x4
- 11.25x23.25x4
- 11.5x21x4
- 12x12x4
- 12x15x4
- 12x16x4
- 12x18x4
- 12x20x4
- 12x22x4
- 12x24x4
- 12x25x4
- 12x26x4
- 12x26.5x4
- 12x27x4
- 12x30x4
- 12x30.5x4
- 12x36x4
- 12.5x21x4
- 12.75x21x4
- 13x18x4
- 13x20x4
- 13x21x4
- 13x21.5x4
- 13x24x4
- 13.25x13.25x4
- 14x14x4
- 14x18x4
- 14x20x4
- 14x22x4
- 14x24x4
- 14x25x4
- 14x27x4
- 14x28x4
- 14x30x4
- 14x36x4
- 14.5x19x4
- 15x15x4
- 15x20x4
- 15x25x4
- 15x30x4
- 15x30.5x4
- 15x30.75x4
- 15.25x15.25x4
- 16x16x4
- 16x18x4
- 16x20x4
- 16x21x4
- 16x21.5x4
- 16x22x4
- 16x22.25x4
- 16x24x4
- 16x25x4
- 16x30x4
- 16x32x4
- 16x36x4
- 16.25x21x4
- 16.25x21.25x4
- 16.38x21.38x4
- 16.5x21x4
- 16.5x22x4
- 17x17x4
- 17x19x4
- 17x20x4
- 17x21x4
- 17x22x4
- 17x25x4
- 17.25x17.25x4
- 17.25x19.25x4
- 17.25x23.25x4
- 17.25x26x4
- 17.25x29.25x4
- 17.25x35.25x4
- 17.5x23.5x4
- 17.5x27x4
- 18x18x4
- 18x20x4
- 18x22x4
- 18x24x4
- 18x25x4
- 18x30x4
- 18x36x4
- 18.25x22x4
- 19x19x4
- 19x21x4
- 19x21.5x4
- 19x22x4
- 19x23x4
- 19x27x4
- 19.25x21.25x4
- 19.25x23.25x4
- 19.5x21x4
- 19.5x22x4
- 19.75x21x4
- 19.75x22x4
- 19.88x21.5x4
- 20x20x4
- 20x21x4
- 20x21.5x4
- 20x22x4
- 20x22.25x4
- 20x23x4
- 20x24x4
- 20x25x4
- 20x27x4
- 20x30x4
- 20x32x4
- 20x34x4
- 20x36x4
- 21x21x4
- 21x22x4
- 21x23x4
- 21x23.25x4
- 21.25x21.25x4
- 21.5x23x4
- 21.5x23.25x4
- 21.5x24x4
- 21.5x26x4
- 22x22x4
- 22x24x4
- 22x26x4
- 22x28x4
- 22x36x4
- 22.25 x 25 x 4"
- 23x25x4
- 23.25x29.25x4
- 23.5x23.5x4
- 23.5x25x4
- 23.5x30.75x4
- 24x24x4
- 24x25x4
- 24x28x4
- 24x30x4
- 24x36x4
- 25x25x4
- 25x28x4
- 25x29x4
- 25x32x4
- 27x27x4
- 28x30x4
- 29x29x4
- 30x30x4
- 30x36x4
Don't see your size? We can customize for you.
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Can't find it on our site? Contact us! We can provide custom filters at great prices.
