Custom Size HVAC Filters (17)

When standard sizes don’t fit, custom size HVAC filters are the solution. At HVAC Filter Solutions, we make it easy to order filters built to your exact dimensions — down to 1/8”. Whether you’re managing a commercial system, replacing an older unit, or need unique sizing for a specific application, our custom filters are engineered to deliver reliable performance, proper airflow, and long-lasting protection. Get the right fit without compromise.

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On all orders in the domestic U.S.

17 products

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Every filter ships free, no minimum required.

  • Can't find your filters?

    Can’t find your filter? No worries — our team is ready to help. We can source hard-to-find sizes or build custom solutions to fit your system. Contact us today and let HVAC Filter Solutions take the guesswork out of clean air.

  • Talk to Real People. No Call Centers. No Bots.

    At HVAC Filter Solutions, you won’t get stuck with an AI script or bounced around overseas. You’ll talk to a real US-based human who actually knows what a MERV rating is — and maybe even cares a little too much about air filters.