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Learn how often to change your furnace filter and the factors that influence replacement schedules to keep your HVAC system running efficiently.

Learn about the best air filters for allergies and how to maintain a low-allergen environment with high-quality HVAC and air purifier filters.

Get the Best Quality 16X20x1 Air Filter for Your Money and Protect Your Air Quality

Price is an important consideration when doing home maintenance by replacing your air filters, but your air filter is not only an important component in protecting your homes HVAC(Heating Ventaliation and Air Conditioning) system, it is important for protecting your family against the top concerns of health and environmental organizations such as the CDC, EPA and American Lung Association. Indoor air quality or IAQ can be 200 to 500 times more polluted than the air outside. 

Complete List of Whole House Brands and Air Conditioner / Furnace Filter Sizes with Actual Size and MERV ratings available

Listed in the chart below are the standard size 1 inch, 2 inch and 4 inch depth air conditioner filters for your AC, Furnace, HVAC at Atomic Filters. Also listed are the whole house air filters collections carried by Atomic Filters.

Find You Filter by Size or Brand

In addition to carrying major brands of furnace filters like Lennox, Carrier, Trion Air Bear and Skuttle we also offer custom size filters at Atomic. 

Complete List of Air Conditioner / Furnace Filter Made in the USA by Sizes with Actual Size and MERV ratings available

Listed are standard size 1 inch, 2 inch and 4 inch depth air filters for your AC, Furnace, HVAC at Atomic Filters. We also offer custom size filters. Select the size to see a collection of filter for that size. Need to know more about MERV ratings check out our air filter knowledge page. Filter are usually listed by the Nominal Size which is a rounded number, based off of the true dimensions of the filter which are called the "actual size". 

Looking for cheap air filters? Read our guide to learn exactly how you can save money and ensure you find the right filters for your unit.