Lennox air filters
Shop Filter King replacement filters for Lennox systems. Made in the USA with fast, free shipping directly to your door.
Guaranteed to fit
Compatible with a wide range of Lennox systems
MERV 8, 11, 13 & Carbon
High-performance filtration for cleaner, healthier air
Fast, free shipping
Fast delivery from 4 fulfillment centers across the USA
Easy to return / exchange
Not the right fit? Return or exchange your order within 30 days.
Choose your Lennox filter
Can’t find your air filter size?
Order a made-to-measure air filter that fits perfectly and keeps your air clean.
10,000+ satisfied customers
4.6 stars, 4478 reviews
4.6 stars, 3597 reviews
"I am a new customer and so happy I found Filter King. Their customer service is truly outstanding."
Christine D.
Verified Buyer
"Good for the price quick delivery"
Charles D.
Verified Buyer
"I'm very satisfied"
Cassandra M.
Verified Buyer
"A++++++++"
david j.
Verified Buyer
"Easy to do business with."
John B.
Verified Buyer
"Great service"
Donald C.
Verified Buyer
"The filters I ordered were great. The size was exactly as advertised, filter size and actual filter size. Other companies I have tried have not met this requirement. I have tried getting the 10x10x2 filters at other places and I am so happy I found a company that I can rely on getting what need and the correct item. The other companies fall short on their product being the actual size they advertise. The Merv 13 filters are great. I highly recommend Filter King for all your filter needs."
Brian A.
Verified Buyer
"Great"
John O.
Verified Buyer
"Fast shipping"
LAWRENCE W.
Verified Buyer
"good fit"
LEON L.
Verified Buyer
Filter King air filters for Lennox
Filter King air filters are compatible with Lennox HVAC systems and work as direct replacements for the original filters made for these units — at a fraction of the price. Each filter is MERV-rated and built to the same dimensional specs, so you get reliable, high-quality filtration without the premium cost.
guaranteed compatibility with