Lennox Home Air Filters

Lennox Home Air Filters are available in a wide range of sizes, from 16x20x5 to 20x20x5 and all the way to 21x26x4. Our Lennox replacement furnace filters will make a perfect fit. Additionally, thanks to a new design, these air filters perfect for removing airborne allergens, like dust, bacteria, pollen, contaminants, and chemical fumes. Subsequently, you benefit from improved air quality, which contributes to better physical and respiratory health. You can use the navigation for finding the best replacement Lennox Furnace filter for your home with timely shipping and great prices.

Use the dropdown to select a size or choose from the list below

Lennox Home Air Filters

Choose a Size Below

Important Information


The manufacturer has discontinued the MERV 6 / APR 450 filters from their line up, our suggested replacement is the MERV 8 / APR 650 Gold filter, you may see the Emerald MERV 6 / APR 450 still on the website, we are actively removing that MERV/APR


** The typical ship time for orders is now around 15 to 20 business days **

Ok, got it

Newsletter Signup

Sign up to join our mailing list and be the first to hear about special pricing, new products, and tips to get the most out of your filters!

You can also sign up for our email reminders to change your filter here

No thanks, I'd rather not
✕