HVAC filters, delivered.

It is printed on the frame of the filter in your system now, in the format 20 x 25 x 1. If the print is gone, measure the slot: length, width, and depth. One warning: the printed size is the nominal size and the real filter is slightly smaller, which is normal. If your system takes a deep cabinet filter, check the depth carefully, a 4-inch filter will not fit a 5-inch cabinet.

MERV 8 is standard dust and pollen control. MERV 11 is the right pick for most homes: pets, allergies, kids. MERV 13 filters the most, including smoke and finer particles. If your system is older or your tech told you to keep airflow easy, stay at 8 or 11.

1-inch filters every 1 to 3 months, 4-inch every 6 to 9 months, 5-inch every 9 to 12 months. Homes with pets or heavy AC use sit at the short end of those ranges.

Our filters are quality compatible replacements made to the same size and MERV specs. They are not made by, affiliated with, or endorsed by the equipment brands they fit. That is exactly why they cost a fraction of the name-brand price.

You pay per shipment, 10% off the listed price, on a fixed schedule: every 3 months for 1-inch filters, every 6 months for 4-inch, once a year for 5-inch. Stripe emails you a receipt for every charge. Pause, skip, or cancel anytime from the link in your receipt email. No contract. See the terms for the full auto-delivery terms.

If the filter does not fit your system, the exchange is free or your money back. That is the Size Fit Guarantee. Just contact us and we will make it right. Unopened filters can also be returned within 30 days of delivery for a full refund. Full details are on the returns policy page.