Limited time · Halloween sale

Something's lurking in your vents!

Dust, dander, pollen, and whatever else moved in over the summer. Take 31% off every filter through October 31 — cut and packed on Long Island, shipped free.

Use code SPOOKY31
Shop the sale Build a custom size
Something's lurking in your vents!

Sale ends October 31 at 11:59pm

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Find your filter size

Every size is 31% off. Don't see yours? Build it custom.

1" Filters

View all 1" →

2" Filters

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4" Filters

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Custom size

Anything from 6" to 60", cut and capped to the eighth of an inch. If your system takes an odd size, we make it — same 31% off.

Build a custom size →
Shop all filters
  • Made in Copiague, LI
  • Free shipping
  • Ships in 24 hours
  • Free exchanges if it doesn't fit

31% off applies to all standard and custom filters. Enter the code at checkout. Offer ends October 31 at 11:59pm ET and cannot be combined with subscription discounts.