Free shipping
Easy returns
Call or text (305) 928-8910
CHOOSE THICKNESS
0.5" air filters 1" air filters 2" air filters 4" air filters 5" air filters All filter sizes
See all 0.5" sizes See all 1" sizes See all 2" sizes See all 4" sizes See all 5" sizes
POPULAR 0.5" SIZES
Narrow (<10")
8x14x0.5 8x24x0.5 8x30x0.5 9.75x23.75x0.5 10x14x0.5
10x16x0.5 10x18x0.5 10x20x0.5 10x24x0.5 10x30x0.5
Medium (11"-20")
12x20x0.5 14x20x0.5 15x20x0.5 16x20x0.5 16x24x0.5
16x25x0.5 17x25x0.5 18x20x0.5 19x27x0.5 19.5x21x0.5
Wide (20"+)
19.75x21x0.5 20x20x0.5 20x21x0.5 20x22x0.5 20x23x0.5
20x24x0.5 20x25x0.5 20x27x0.5 20x30x0.5 21x23x0.5
POPULAR 1" SIZES
Narrow (<10")
6x14x1 6x30x1 8x8x1 8x12x1 8x14x1
8x24x1 9x11x1 9.5x9.5x1 10x30x1 10x36x1
Medium (11"-20")
11.5x11.5x1 14x14x1 15.5x19.5x1 16x19x1 16x20x1
17x21x1 17.5x17.5x1 17.5x22x1 19.5x19.5x1 19.5x23.5x1
Wide (20"+)
20x20x1 20x21x1 20x23x1 20x24x1 20x25x1
20x30x1 21x23x1 24x24x1 24x30x1 30x30x1
POPULAR 2" SIZES
Narrow (<10")
8x14x2 8x24x2 9.5x9.5x2 9.5x19.5x2 10x10x2
10x16x2 17x10x2 10x18x2 10x20x2 10x24x2
Medium (11"-20")
14x14x2 14x20x2 14x25x2 16x16x2 16x20x2
16x24x2 16x25x2 16x30x2 18x20x2 18x24x2
Wide (20"+)
20x20x2 20x22x2 20x24x2 20x25x2 20x30x2
20x35x2 24x24x2 28x30x2 30x32x2 30x36x2
POPULAR 4" SIZES
Narrow (<10")
8x14x4 8x16x4 8x20x4 10x10x4 10x15x4
10x16x4 10x18x4 10x20x4 10x24x4 10x25x4
Medium (11"-20")
12x20x4 14x20x4 15x25x4 15.5x24.5x4 16x16x4
16x20x4 16x24x4 16x25x4 19.5x19.5x4 19.5x24.5x4
Wide (20"+)
20x20x4 20x23x4 20x24x4 20x25x4 20x30x4
24x24x4 24x25x4 24x30x4 25x25x4 30x32x4
POPULAR 5" SIZES
Narrow (<10")
16x20x5 16x25x5 19x20x5
Medium (11"-20")
20x20x5 20x25x5
CHOOSE A BRAND
Trion Air Bear Amana American Standard Armstrong
BDP Bryant Carrier Day and Night
Goodman Honeywell Lennox Payne
Trane
See all brands
CHOOSE MERV RATING
MERV 8 MERV 11 MERV 13 MERV 8 Carbon MERV 8 Freedom MERVs explained
See all MERV 8 sizes See all MERV 11 sizes See all MERV 13 sizes See all MERV 8 Carbon sizes See all MERV 8 Freedom sizes
MERVs explained
POPULAR MERV 8 SIZES
Narrow (<10")
6x14x1 6x30x1 8x8x1 8x12x1 8x14x1
8x24x1 9.5x9.5x1 10x10x2 10x30x1 10x36x1
Medium (11"-20")
11.5x11.5x1 15.5x19.5x1 16x20x1 16x20x2 16x25x2
16x25x4 17x21x1 17.5x17.5x1 17.5x22x1 19.5x19.5x1
Wide (20"+)
20x20x1 20x20x2 20x21x1 20x23x1 20x25x1
20x25x2 20x30x1 21x23x1 24x24x1 24x30x1
Shop MERV 8 air filters
POPULAR MERV 11 SIZES
Narrow (<10")
8x8x1 8x14x1 8x24x1 8x30x1 9.5x9.5x1
10x10x1 10x14x1 10x20x1 10x30x1 10x36x1
Medium (11"-20")
11.5x11.5x1 12x12x1 14x14x1 16x16x1 16x20x1
16x25x1 16x25x4 18x24x1 19x23x1 19.5x19.5x1
Wide (20"+)
20x20x1 20x20x4 20x24x1 20x25x1 20x25x4
20x30x1 23.5x23.5x1 24x24x1 24x30x1 30x36x1
Shop MERV 11 air filters
POPULAR MERV 13 SIZES
Narrow (<10")
8x8x1 8x24x1 9x11x1 9x11.38x1 9.5x9.5x1
10x10x1 10x10x2 10x20x1 10x30x1 10x36x1
Medium (11"-20")
12x12x1 14x14x1 16x16x1 16x20x1 16x25x1
16x25x4 17.5x17.5x1 18x20x1 19.5x19.5x1 19.5x23.5x1
Wide (20"+)
20x20x1 20x20x4 20x23x1 20x25x1 20x25x4
20x30x1 20x40x1 21x21x1 21x23x1 30x30x1
Shop MERV 13 air filters
POPULAR MERV 8 CARBON SIZES
Narrow (<10")
6x30x1 8x8x1 8x24x1 8x30x1 9.5x9.5x1
10x10x1 10x20x1 10x24x1 10x30x1 10x36x1
Medium (11"-20")
12x12x1 14x14x1 14x20x1 14x30x1 16x20x1
16x25x1 18x20x1 19x20x2 19.5x19.5x1 19.5x23.5x1
Wide (20"+)
20x20x1 20x23x1 20x24x1 20x25x1 20x25x4
20x30x1 20x40x1 24x24x1 24x30x1 30x30x1
Shop MERV 8 Carbon odor eliminator air filters
POPULAR MERV 8 FREEDOM SIZES
Medium (11"-20")
16x20x1 16x25x1 18x24x1 18x30x1
Wide (20"+)
20x20x1 20x25x1 24x24x1
Shop limited edition Freedom Filters
Only available through July 2026

More than an air filter. A tribute to 250 years of freedom.

A limited-edition USA-themed filter frame celebrating America’s historic 250th anniversary. Every purchase helps support veteran service dogs.

1/1
Made in the USA Made in the USA
Fast, free shipping Fast, free shipping
Durable & long-lasting Durable & long-lasting
Guaranteed to fit Guaranteed to fit
USA 250th Anniversary

What are Freedom Filters?

Freedom Filters is Filter King’s limited-edition campaign celebrating America’s 250th anniversary. Available in seven popular 1-inch sizes, each filter features a patriotic frame design that marks the milestone every time you change it. Inside, you get the same MERV 8 performance Filter King is known for: capturing dust, pollen, mold spores, and pet dander on every pass. The USA-themed frame is what makes it unique.

Big Dog Ranch Rescue veteran service dogs

Serving those who served

To celebrate America’s 250th anniversary, we wanted to do more than simply release a novelty product. That is why a portion of every Freedom Filters sale will go to Big Dog Ranch Rescue’s Veteran Service Dog Training Program – a VA-recognized therapy program that trains and matches rescue dogs with veterans living with PTSD, TBI, or MST. Every dog is placed at no cost to the veteran.

Our unique range of filters

Available in a variety of pack sizes - from single filters to packs of 12 and more.

16x20x1 Freedom Filters (MERV 8, 2-Pack)
16x20x1
2
Pack

16x20x1 Freedom Filters (MERV 8, 2-Pack)

$29.98 ($14.99/pc.)
View filter
16x25x1 Freedom Filters (MERV 8, 2-Pack)
16x25x1
2
Pack

16x25x1 Freedom Filters (MERV 8, 2-Pack)

$31.10 ($15.55/pc.)
View filter
18x24x1 Freedom Filters (MERV 8, 2-Pack)
18x24x1
2
Pack

18x24x1 Freedom Filters (MERV 8, 2-Pack)

$36.66 ($18.33/pc.)
View filter
18x30x1 Freedom Filters (MERV 8, 2-Pack)
18x30x1
2
Pack

18x30x1 Freedom Filters (MERV 8, 2-Pack)

$41.10 ($20.55/pc.)
View filter
20x20x1 Freedom Filters (MERV 8, 2-Pack)
20x20x1
2
Pack

20x20x1 Freedom Filters (MERV 8, 2-Pack)

$31.10 ($15.55/pc.)
View filter
20x25x1 Freedom Filters (MERV 8, 2-Pack)
20x25x1
2
Pack

20x25x1 Freedom Filters (MERV 8, 2-Pack)

$33.30 ($16.65/pc.)
View filter
24x24x1 Freedom Filters (MERV 8, 2-Pack)
24x24x1
2
Pack

24x24x1 Freedom Filters (MERV 8, 2-Pack)

$33.36 ($16.68/pc.)
View filter
Freedom Filter close-up
Freedom Filter close-up
Freedom Filter close-up
Freedom Filter close-up
Freedom Filter close-up
Freedom Filter close-up
MERV 8 Protect Freedom

What does MERV 8 protect against?

MERV 8 filters remove up to 90% of common household particles including dust mites, pollen, pet dander, and mold spores. These filters provide basic air quality for standard homes without allergies.

What sets Filter King apart

Filter King designs high-quality air filters engineered for precise fit, efficient installation, and extended service life. Ideal for professionals who demand consistent performance.

Made in the USA

Made in the USA

Filter King is a US-based manufacturer, and all our materials are produced and put together in our Alabama warehouse right here in the USA.

Durable & long-lasting

Durable & long-lasting

High-quality materials deliver dependable performance and extended durability, even under demanding daily use.

Fast, reliable fulfillment

Fast, reliable fulfillment

Four fulfillment centers across the US ensure most orders arrive within 1-2 days.

Guaranteed to fit

Guaranteed to fit

Try it risk-free with our 30-day fit guarantee for total peace of mind. If it’s not right, we’ll make it right — no questions asked.

Own a Piece of America's 250th Anniversary

The same trusted Filter King performance. A limited-edition patriotic frame. Support for veteran service dogs.

Get yours before they’re gone!

Image of business customer login page
Frequently asked questions

Frequently Asked Questions (FAQs)

Does the frame affect filtration performance?

No. The patriotic frame is a design element only – the filter media inside is identical to Filter King's standard MERV 8 product. Filtration performance, lifespan, and compatibility are unchanged.

How long will Freedom Filters be available?

Freedom Filters are available throughout summer 2026. Whether they'll continue beyond that is still to be decided – if you want to make sure you don't miss out, ordering a multi-pack now is the safest option.

Can I set up auto-delivery on Freedom Filters?

Yes. Auto-delivery is available on Freedom Filters and takes an additional 5% off your order price, on top of any other discounts applied. Given that these are a limited-edition series, auto-delivery is a good way to keep your supply topped up while they're available.