Air filters delivered when it's time to change them.

Change your filters on time, every time. No hassles, just fresh air.


We make it easy!

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Your Home's Filters

Each delivery contains the exact number of filters your home needs, in all the right sizes.

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Automatic Delivery

Each delivery acts as a physical reminder that it’s time to change your filters. Plus, FREE shipping!

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Cancel Anytime

No commitment. You can cancel or modify your account anytime to fit your needs.

Stop thinking about filters

Once you’ve set up your subscription, we handle the rest for every subsequent shipment.
No more scribbled reminders to get to the hardware store, no more digital reminder alarms to endlessly snooze.

Second Nature saves you time and frees up mental space so you can focus on what really matters: keeping you and your family healthy.

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Quality you can feel

Air you can breathe. No flimsy, paper-thin filters that feel like they’ll disintegrate with the slightest puff of air.

Basically, these are the best pleated filters on the market. Plus, everything’s made in the good ol’ USA.

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Save up to 15%

Have you seen how many 0s are at the end of an HVAC repair bill?
It’s a lot more than you’d think unless you’re smart about your home maintenance.

Regularly replacing your air filters can save you up to 15% on your monthly heating and cooling costs. It also keeps your HVAC unit running smoothly.

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Over 66,000 sizes

No more “sorry honey, I couldn’t find the size we needed.”
We have over 66,000 filter sizes ready to ship. If you can’t find it with us, you should probably just sell your house.

Are your air intakes one-of-a-kind? We offer custom air filter sizes for just a few bucks more per filter!

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Same Great Service. Great New Look.

Word On The Pleats

Share the wellness, refer a friend!

Your friends get their first order free, and you’ll get a $10 account credit when they subscribe. It’s basically free money.

Yay, Friends!

Good Clean Thoughts

Helpful guides for a healthier home