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20x20x1 Air Filters

20x20x1 Filter

A premium quality Second Nature home air filter will go a long way to keep your home healthy, your air clean, and your HVAC system happy.

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  • It’s affordable and shipping is always free. Always.
  • American-made.

Why Second Nature?

You'll love the benefits!

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Time & Money Savings

Prevent costly repairs to your heating and cooling systems

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HVAC Protection

It can reduce your energy usage of your HVAC system by up to 15%.

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Healthier Living

Improve your home’s air quality by removing harmful toxins

20x20x1 Air Filters

Available in 3 Different Qualities

Catch Some

MERV 8

Average Starting at
$12 per filter *
Select This Quality

Great for homeowners looking to catch some of the bigger annoyances, like dust and pollen particles.

Allergens Blocked

plant with pollen Pollen
dust cloud Dust
mold spore Mold
dust mite Dust Mites
bacteria Bacteria

Catch More

MERV 11

Average Starting at
$16 per filter *
Select This Quality

Awesome for those needing to catch smaller particles like pet dander in addition to dust and mold. A ‘must’ for pet owners.

Allergens Blocked

plant with pollen Pollen
dust cloud Dust
mold spore Mold
dust mite Dust Mites
bacteria Bacteria
face of cat Pet Dander

Catch All

MERV 13

Average Starting at
$20 per filter *
Select This Quality

Perfect for folks who want to catch all the particles they can, even some of the smallest ones like cooking oil and cigarette smoke.

Allergens Blocked

plant with pollen Pollen
dust cloud Dust
mold spore Mold
dust mite Dust Mites
bacteria Bacteria
face of cat Pet Dander
factory producing smog Smog
smoking cigarette Smoke
pan with cooking oil smoke Cooking Oil
virus Virus Carriers

When we say "Catch All", we mean it collects all the particles you could worry about in an average household while still providing proper air flow. These are not medical grade HEPA filters. To learn more about MERV 13 air filters, click here.

* For filters thicker than 1”, pricing varies by dimensions. Custom sizes are available for an additional $3.00 per filter. To get your price, click Get Catchin‘ above.

pleated air filter being placed in ceiling return

What makes Second Nature the right choice for you?

  • No more forgotten filter changes!
  • Free shipping on every order, every time. Guaranteed.
  • Improve your indoor air quality and protect your HVAC system.
  • Actual, 100% real human beings answer our phones.

Second Nature vs The World

The winner! Clearly.

Pleated Fiberglass Washable
Efficient at Catching Large Debris
Yes Yes Yes
Efficient at Catching Small Particles
Yes No No
Recommended for People with Allergies
Yes No No
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