How It Works

Finally, filters made easy breezy

Filter Out the Confusion

We started Windmill filters to make buying and replacing your home air filters as easy as possible

Easy as 1, 2, 3

Personalize Your Filter

Tell us about you and your home, and we’ll recommend the best air filter and replacement schedule

Take Our Quiz ⟶

Save with Auto-Refills

We ship in bulk annually to save you money and help decrease our carbon footprint. Free shipping, always

Get Text Reminders

No more remembering when to replace your filter... we’ll text you when it’s time. Clean air, clearer headspace

Skip a delivery/cancel anytime.

Clean air, Clean Earth

Windmill filters are 100% carbon neutral. Every time you buy a pack of Windmill filters, we’ll automatically purchase carbon offsets on your behalf (at no additional cost to you). These offsets support environmental and sustainability projects around the world.