An air filter is a replaceable part of your HVAC (heating, ventilating and cooling) system. It traps dust, dirt, and other particles from the air, helping to keep your indoor air cleaner and your HVAC system running smoothly.

Direct to your door on a climate conscious schedule, subscribers will receive a package every 6 months with as many air filters as you need for that period. Shipping is free for subscribers. Made in the USA to strict quality standards.

We make it easy to stay on top of replacements. With our subscription service, you’ll receive high quality air filters delivered to your door every six months. You can manage your subscription anytime by logging into your account on our website.

Filter sizes are listed in nominal dimensions (slightly rounded measurements). The actual size is usually about ½’’ smaller in width and height, and ¼’’ thinner — ensuring that the filter will fit your system. Here’s how to measure what will work best for you: 1. Look at the size printed on your current filter. 2. If there’s no label, measure the height, width, and thickness of the slot. 3. Round up to the nearest whole number — that’s your nominal size. All sizes on our site are nominal.

No. These are for HVAC systems only. We're working on future options for Fittes vents, but none are compatible today.

How often you need to replace your air filter depends on its MERV rating, thickness, and your home environment. If you have pets, allergies, or live in an urban area, you may need to change it as often as once a month. A dirty filter restricts airflow, which can strain your HVAC system, reduce efficiency, increase energy bills, and lower indoor air quality. Regular replacement helps keep your air clean, your system running smoothly, and your costs down.