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 14+ years and is a preferred online retailer for AAF Flanders Furnace and AC Filters

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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Prepping Your Furnace for Winter

Prepping Your Furnace for Winter

Your home's furnace is the key to keeping you warm, safe, and comfortable this winter. Follow this guide on prepping your furnace for winter.
Pleated vs. Non-Pleated Air Filters: What To Choose

Pleated vs. Non-Pleated Air Filters: What To Choose

You might not realize that different air filters serve different purposes. Here's a look at pleated vs. non-pleated air filters and what to choose.
How To Transition Your HVAC System From Summer To Fall

How To Transition Your HVAC System From Summer To Fall

You might be wondering how to correctly use your HVAC system in the colder months. Learn how to transition your HVAC system from summer to fall ahead.