Right size. Right on time.
Caliper makes HVAC and furnace air filters in every size, to order, in the USA. Tell us your size once, and we'll send a fresh filter right when your home needs it.
Our promises
- Fits, or it's free. We measure every filter before it ships. If yours doesn't fit, we send a new one free and you keep the first.
- We remember, so you don't. Your size, your schedule, your address. We check in before each delivery.
- Any size, made to order. We make your exact size, priced like the next standard size up.
Three grades
- Everyday (MERV 8): Dust, lint and pollen. The right pick for most homes. $6.35 per filter for a 20×20×1 six-pack.
- Allergy (MERV 11): Adds pet dander and mold spores. For pets and allergy season. $8.88 per filter for a 20×20×1 six-pack.
- Allergy + Smoke (MERV 13): Adds smoke, smog and fine particles. For wildfire season and asthma. $9.84 per filter for a 20×20×1 six-pack.
Delivered when you need it
Subscribe and save 10%. We time each delivery to your local weather, air quality, pets and allergies, and you pay per box when it ships, with no monthly fee.