Shop Furnace and AC Filters - Trusted in Filtration Since 2006

Over a million filters sold and replaced. That’s billions of particles removed from indoor air. Trust your air to us. RTF has been in business for 15+ years and is a preferred online retailer for AAF Flanders Furnace and AC Filters. We sell filters by the case or individual filters with our subscription program.

Quality Furnace and AC Filters Online

What’s your need? Commercial? Residential? Industrial? HEPA? We have you covered! At RememberTheFilter.com, you’ll find the perfect HVAC filter online for your system. Our stock features leading manufacturers!

Buying furnace and AC filters online at RememberTheFilter.com is easy, convenient, and saves you time and money. No high-pressure sales. No time-consuming service appointments. No searching for weeks or months for your filter size. Just friendly, knowledgeable filter experts dedicated to helping you select the right filters for your system.

With thousands of sizes to choose from, you’ll never have to search for your filter again! You can even buy custom furnace and AC filters online! We’ll send you perfect fit filters for your HVAC system. We deliver filters to you for free, too! Whether you live here with us in the Pacific Northwest, or you’re in Texas, Chicago, New York, Los Angeles, or Florida, we deliver for free anywhere in the entire contiguous United States – even oversized or special order filters.

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Should You Change Your Air Filter More Often in Summer?

Should You Change Your Air Filter More Often in Summer?

We here at Remember the Filter are not jaded cynics. The ruthless Capitalist response to the question “Should you change your air filter more often...
How To Make Your Home Greener

How To Make Your Home Greener

In honor of Earth Day 2021, there are some steps you can take to make your household just a little more sustainable. Here’s how to go green at home.
How Hotels Are Improving Their Air Quality

How Hotels Are Improving Their Air Quality

Returning to domestic travel requires assuring the safety of travelers by ensuring clean air in hotels. Here’s what operators are doing to keep the air clean.