Find Replacement Air Filters Fast & Easy!

Filters Fast provides a wide range of air filter types to help you match your home’s air quality needs and your HVAC system’s requirements. Some of our popular categories include:

Pleated Air Filters for general household use and dependable performance

High-Efficiency MERV Air Filters to capture smaller particles and improve overall indoor air quality

Activated Carbon Filters that help reduce odors from cooking, pets, smoke, and more

Electrostatic Filters that attract and trap particles using static charge

Washable and Reusable Filters for those who prefer an eco-friendly option with a long lifespan

Whole-Home HVAC and Furnace Filters available in multiple sizes to support efficient filtration throughout your home

While these two terms are often used interchangeably, furnace filters and air filters do differ in certain ways. Furnace filters are specifically designed for use in your home’s furnace or HVAC system to protect your equipment and improve household airflow. The term “air filters” is a broad one that refers to any filter that’s designed to clean the air, which includes furnace filters, whole-home AC replacement filters, or even air purifier filters. At Filters Fast, we carry every size and type of air filter to meet your one-of-a-kind needs.

Finding the right air filter size for your home is simple when you shop at Filters Fast. The easiest way is to check your current filter, as the size is usually printed on the frame. If you don’t have the old filter handy, you can measure your system’s filter slot (length X width X depth).

At Filters Fast, we carry a wide selection of common filter sizes, including:

20x20x1

20x25x1

16x25x1

20x30x1

16x20x1

24x30x1

30x32x2

Once you know the size of your filter, you can easily browse filters in the size that fits your system perfectly.

HEPA and MERV air filters are both efficient when it comes to improving your indoor air quality, but they take different approaches to measuring performance. MERV (Minimum Efficiency Reporting Value) ratings indicate how effectively a filter captures particles of various sizes, with higher numbers capturing smaller particles like dust, pollen, and pet dander. HEPA (High-Efficiency Particulate Air) filters meet a strict standard for removing 99.97% of particles as small as 0.3 microns, so they’re ideal for allergy or asthma sufferers. At Filters Fast, we carry both MERV air filters and HEPA options so you can choose the level of filtration that best fits your home, your HVAC system, and your family’s needs.

The Minimum Efficiency Reporting Value (MERV) is used by manufacturers to explain how efficient the air filter is at trapping airborne particles. Before you choose a MERV rating check with your HVAC manufacturer to see what your system is designed to handle. Picking the wrong filter can impact air flow and reduce equipment life.

MERV 8: Equipment Protection, Lint and Dust, Pollen, Pet Dander, Mold Spores, Dust Mites

MERV 11: Equipment Protection, Lint and Dust, Pollen, Pet Dander, Mold Spores, Dust Mites, Fine Dust, Auto Emissions, Smoke

MERV 13: Equipment Protection, Lint and Dust, Pollen, Pet Dander, Mold Spores, Dust Mites, Fine Dust, Auto Emissions, Smoke, Very Fine Dust, Bacteria

The answer to this question comes down to factors like your household’s air quality needs, the presence of pets or allergy concerns, and your HVAC system’s specifications - there is no one-size-fits-all solution. For most homes, a MERV 8 to MERV 11 filter is ideal. This range captures common airborne particles like dust, pollen, and pet dander and improves indoor air quality without putting unnecessary strain on your HVAC system. Choosing the right MERV rating helps keep your home’s air clean while ensuring your system runs efficiently and safely.

Not necessarily. HEPA filters provide excellent filtration by capturing very small particles, but their dense construction can restrict airflow in standard residential HVAC systems. Before upgrading to a HEPA filter, be sure to check your system’s specifications or consult your HVAC manufacturer to confirm compatibility.

Yes! Filters Fast offers a wide range of air filters designed to fit virtually every major HVAC brand. Our selection includes Filters Fast® brand filters, high-quality OEM filters, and other compatible options, so you can always find the right size and type for your system.

Our selection covers all the major brands homeowners rely on, including:

Aprilaire

Honeywell

Trion

Lennox

3M Filtrete

Carrier

Bryant

Trane

GeneralAire