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Find the right HVAC and furnace filters by size, brand, or performance level.

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CHOOSE YOUR AIR FILTER SIZE HERE

Shop Air Filters By Exact Size

Start with the nominal size printed on your current filter, then choose MERV 8 by default or compare other ratings on the product page.

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257 sizes
6x10x1 6x12x1 6x14x1 7.5x13.5x1 7.5x29.5x1 8x8x1 8x14x1 8x16x1 8x20x1 8x24x1 8x30x1 9x30x1 9.5x9.5x1 9.5x13.5x1 9.5x19.5x1 9.5x23.5x1 9.5x29.5x1 9.75x23.75x1 10x10x1 10x12x1 10x14x1 10x15x1 10x16x1 10x18x1 10x20x1 10x22x1 10x24x1 10x25x1 10x28x1 10x30x1 10x32x1 10x33x1 10x36x1 11.25x11.25x1 11.25x19.25x1 11.25x23.25x1 11.5x11.5x1 11.5x15.5x1 11.5x17.5x1 11.5x19.5x1 11.5x21x1 11.5x23.5x1 11.5x29.5x1 11.88x16.88x1 12x12x1 12x14x1 12x15x1 12x16x1 12x18x1 12x20x1 12x22x1 12x24x1 12x25x1 12x26x1 12x26.5x1 12x27x1 12x30x1 12x30.5x1 12x34x1 12x36x1 12.25x24.25x1 12.5x21x1 12.5x24x1 12.75x21x1 13x18x1 13x20x1 13x21x1 13x21.5x1 13x24x1 13x25x1 13.25x13.25x1 13.25x17.75x1 13.25x22.75x1 13.5x13.5x1 13.5x17.5x1 13.5x19.5x1 13.5x21.5x1 13.5x23.5x1 13.5x24.5x1 13.5x27.5x1 13.5x29.5x1 13.5x35.5x1 14x14x1 14x16x1 14x18x1 14x20x1 14x22x1 14x24x1 14x25x1 14x27x1 14x28x1 14x30x1 14x36x1 14.5x19x1 14.5x19.5x1 14.5x24.5x1 14.5x27.5x1 15x15x1 15x19x1 15x20x1 15x25x1 15x28x1 15x30x1 15x30.5x1 15x30.75x1 15.25x15.25x1 15.5x15.5x1 15.5x17.5x1 15.5x19.5x1 15.5x20.5x1 15.5x21.5x1 15.5x23.5x1 15.5x24.5x1 15.5x29x1 15.5x31.5x1 16x16x1 16x18x1 16x20x1 16x21x1 16x21.5x1 16x22x1 16x22.25x1 16x24x1 16x25x1 16x27x1 16x28x1 16x30x1 16x32x1 16x36x1 16.25x21.25x1 16.38x21.38x1 16.38x21.5x1 16.5x19.5x1 16.5x21x1 16.5x21.5x1 16.5x22x1 16.5x24.5x1 17x17x1 17x19x1 17x20x1 17x21x1 17x22x1 17x25x1 17x27x1 17.25x17.25x1 17.25x19.25x1 17.25x23.25x1 17.25x26x1 17.25x29.25x1 17.25x35.25x1 17.5x17.5x1 17.5x19.5x1 17.5x20x1 17.5x21x1 17.5x21.5x1 17.5x22x1 17.5x23.5x1 17.5x24.5x1 17.5x27x1 17.5x29.5x1 17.5x35.5x1 18x18x1 18x20x1 18x21x1 18x22x1 18x24x1 18x25x1 18x28x1 18x30x1 18x36x1 18.25x22x1 19x19x1 19x20x1 19x21x1 19x21.5x1 19x22x1 19x23x1 19x27x1 19.25x21.25x1 19.25x23.25x1 19.5x19.5x1 19.5x20.5x1 19.5x21x1 19.5x21.5x1 19.5x22x1 19.5x22.5x1 19.5x23.5x1 19.5x24.5x1 19.5x29.5x1 19.5x35.5x1 19.75x21x1 19.75x21.5x1 19.75x22x1 19.88x21.5x1 20x20x1 20x21x1 20x21.5x1 20x22x1 20x22.25x1 20x23x1 20x24x1 20x25x1 20x27x1 20x30x1 20x32x1 20x34x1 20x36x1 20.5x21.5x1 20.5x22.5x1 21x21x1 21x21.5x1 21x22x1 21x23x1 21x23.25x1 21x23.5x1 21x27x1 21.25x21.25x1 21.5x21.5x1 21.5x23x1 21.5x23.25x1 21.5x23.5x1 21.5x24x1 21.5x26x1 22x22x1 22x24x1 22x26x1 22x28x1 22x36x1 22.25x25x1 23x23x1 23x25x1 23.25x29.25x1 23.5x23.5x1 23.5x25x1 23.5x27.5x1 23.5x30.75x1 23.5x35.5x1 24x24x1 24x25x1 24x28x1 24x30x1 24x36x1 24.5x24.5x1 24.5x27x1 24.5x31.5x1 25x25x1 25x28x1 25x29x1 25x32x1 27x27x1 28x30x1 29x29x1 29x30x1 29.5x29.5x1 30x30x1 30x32x1 30x36x1

Shop By Filter Type

MERV 8 MERV 11 MERV 13 Odor Eliminator

WHAT SIZE FILTER DO I NEED?

Use the size printed on your current filter.

Most HVAC filters show a nominal size on the frame, such as 16x20x1. Match that printed size first, then confirm the actual size if your system fit is tight.

Find Your Size
1

Check the frame

Look for the nominal width, height, and depth printed on the filter edge.

2

Measure if needed

If the label is missing, measure width by height by depth to the nearest usable size.

3

Choose a MERV rating

MERV 8 is the default starting point; MERV 11 and 13 capture finer particles.

Shop By Brand

Honeywell Carrier Lennox Bryant Aprilaire Trion

All Filters

Common sizes and filter types for home HVAC systems.

Free Shipping

Free Shipping On All Orders across the United States.

Quality Focused

Built for clean airflow, better fit, and routine replacement.

Auto Delivery

Fresh Filters On A Schedule

Set a replacement rhythm that keeps home air moving without last-minute store runs.

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Air Filter Help

How to find your air filter size

How To Find Your Filter Size

Use the printed size or measure the filter to choose the right replacement.

How to replace an air filter

How To Replace A Filter

Check airflow direction, slide the filter into place, and replace it on schedule.

Learn About Cleaner Air

How To Shop Online

Start with size, then compare MERV levels and replacement timing.

Filter Cleaning Basics

Keep the surrounding return area clean for better airflow.

Replace On Time

Routine replacement helps reduce buildup and system strain.

Monitor Air Quality

Match filter performance to dust, pets, and seasonal needs.

Maintenance Tips

Small habits help filters perform through their replacement cycle.

Choose With Confidence

Use clear sizing and filter ratings to narrow the options quickly.

WHAT OUR CUSTOMERS SAY

Replacement filters that are easy to find and reorder.

★★★★★

“The size was easy to match and the filters arrived ready for the next change.”

Verified Customer
★★★★★

“Clear sizing made it simple to compare MERV options for our home.”

Verified Customer
★★★★★

“Fast replacement, good fit, and the pack options make routine changes easier.”

Verified Customer

MERV Guide

Compare Common Filter Ratings

MERV 8, MERV 11, MERV 13, and Odor Eliminator filters support different home air needs. Choose by system fit and the particles you want to capture.

Compare Filters
MERV 8 MERV 11 MERV 13 Odor Eliminator

FAQ

Common Air Filter Questions

How do I find my air filter size?

Use the nominal size printed on your current filter frame, then confirm width, height, and depth if the label is missing.

Which MERV rating should I choose?

MERV 8 is a common starting point, while MERV 11 and MERV 13 capture smaller particles for homes that need more filtration.

Do you offer custom sizes?

Yes. Use the custom air filter path when your filter opening does not match a standard listed size.

How often should I replace a filter?

Replacement timing depends on your system, household dust, pets, and season. Check the filter regularly and replace it when airflow or visible buildup changes.