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!

Your Home's Filters

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

Automatic Delivery

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

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.

Tell Me More!

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.

Tell Me More!

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.

Tell Me More!

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!

Tell Me More!

Stop thinking about filters

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

Tell Me More

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.

Tell Me More

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.

Tell Me More

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!

Tell Me More

is now

Same Great Service. Great New Look.

Word On The Pleats

Love getting these!

I love getting the filters in the mail. Not having to worry about going and buying them. They are great quality filters!

Laura P.

Great service. Makes it easy

Great service. Makes it easy to remember to change your filter on a regular basis.

Laura Y.

Love the easy filter!

I really love getting my easy filter every month. I now remember to change my filter - upon its arrival each month!!!! It is top quality!

Amy W.

Great Service

The service is great. Don't have to remember to pick up filters every few months. The only problem encountered has been crushed corners on the filters when the box has been damaged in shipping.

Theresa R.

Quality and convenient

Timely and quality filter arrives and is billed at an interval I set. Precisely sized filter always arrives on schedule and packed minimally but effectively. Great service.

Jason V.

Convenient!

I love the convenience of having my filters delivered to my door - I change my filters every 2 to 3 weeks. I have two cats and an asthmatic daughter, these filters catch it all!

Diane B.

Keeps us on schedule

The service is great! Every time a shipment comes we know it's time to change them. We don't have to remember and then go searching for the sizes for our house. It's so convenient!

Lillian W.

Easy and Easy

Always easy to update credit card information if necessary and re-instate Auto Order

Carl G.

convenient

Love that I do not have to go shopping to try to find what I want and need!

Terry D.

makes it easy

I love getting my filters shipped to me, so I never forget to change my filters. And its a great cost

Janet H.

Super easy

I really love this! We don't have to think to replace anything, they come and we know it's time!

Amanda N.

Great service

I wish I had this service years ago. Great way to keep up with the maintenance of my heating and cooling system. I highly recommend the service. Great price.

Mark B.

Love getting these!

I love getting the filters in the mail. Not having to worry about going and buying them. They are great quality filters!

Laura P.

Great service. Makes it easy

Great service. Makes it easy to remember to change your filter on a regular basis.

Laura Y.

Love the easy filter!

I really love getting my easy filter every month. I now remember to change my filter - upon its arrival each month!!!! It is top quality!

Amy W.

Great Service

The service is great. Don't have to remember to pick up filters every few months. The only problem encountered has been crushed corners on the filters when the box has been damaged in shipping.

Theresa R.

Quality and convenient

Timely and quality filter arrives and is billed at an interval I set. Precisely sized filter always arrives on schedule and packed minimally but effectively. Great service.

Jason V.

Convenient!

I love the convenience of having my filters delivered to my door - I change my filters every 2 to 3 weeks. I have two cats and an asthmatic daughter, these filters catch it all!

Diane B.

Keeps us on schedule

The service is great! Every time a shipment comes we know it's time to change them. We don't have to remember and then go searching for the sizes for our house. It's so convenient!

Lillian W.

Easy and Easy

Always easy to update credit card information if necessary and re-instate Auto Order

Carl G.

convenient

Love that I do not have to go shopping to try to find what I want and need!

Terry D.

makes it easy

I love getting my filters shipped to me, so I never forget to change my filters. And its a great cost

Janet H.

Super easy

I really love this! We don't have to think to replace anything, they come and we know it's time!

Amanda N.

Great service

I wish I had this service years ago. Great way to keep up with the maintenance of my heating and cooling system. I highly recommend the service. Great price.

Mark B.

Love getting these!

I love getting the filters in the mail. Not having to worry about going and buying them. They are great quality filters!

Laura P.

Great service. Makes it easy

Great service. Makes it easy to remember to change your filter on a regular basis.

Laura Y.

Love the easy filter!

I really love getting my easy filter every month. I now remember to change my filter - upon its arrival each month!!!! It is top quality!

Amy W.

Great Service

The service is great. Don't have to remember to pick up filters every few months. The only problem encountered has been crushed corners on the filters when the box has been damaged in shipping.

Theresa R.

Quality and convenient

Timely and quality filter arrives and is billed at an interval I set. Precisely sized filter always arrives on schedule and packed minimally but effectively. Great service.

Jason V.

Convenient!

I love the convenience of having my filters delivered to my door - I change my filters every 2 to 3 weeks. I have two cats and an asthmatic daughter, these filters catch it all!

Diane B.

Keeps us on schedule

The service is great! Every time a shipment comes we know it's time to change them. We don't have to remember and then go searching for the sizes for our house. It's so convenient!

Lillian W.

Easy and Easy

Always easy to update credit card information if necessary and re-instate Auto Order

Carl G.

convenient

Love that I do not have to go shopping to try to find what I want and need!

Terry D.

makes it easy

I love getting my filters shipped to me, so I never forget to change my filters. And its a great cost

Janet H.

Super easy

I really love this! We don't have to think to replace anything, they come and we know it's time!

Amanda N.

Great service

I wish I had this service years ago. Great way to keep up with the maintenance of my heating and cooling system. I highly recommend the service. Great price.

Mark B.

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

Staying Healthy

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!

Your Home's Filters

Automatic Delivery

Cancel Anytime

Stop thinking about filters

Quality you can feel

Save up to 15%

Over 66,000 sizes

Stop thinking about filters

Quality you can feel

Save up to 15%

Over 66,000 sizes

is now

Same Great Service. Great New Look.

Word On The Pleats

Share the wellness, refer a friend!

Good Clean Thoughts

Helpful guides for a healthier home

How A MERV 13 Air Filter Can Help Decrease Your Risk of Illness

Can Air Filters Help Protect Your Family from Infectious Diseases?

How A MERV 13 Air Filter Can Help Decrease Your Risk of Illness

Can Air Filters Help Protect Your Family from Infectious Diseases?

Four Tricks to Stay Productive While Working from Home

How A MERV 13 Air Filter Can Help Decrease Your Risk of Illness

Can Air Filters Help Protect Your Family from Infectious Diseases?

Four Tricks to Stay Productive While Working from Home

How Can I Easily Improve My Home's Indoor Air Quality?

READ MORE