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PuroAir 400 Replacement Filter

for PuroAir 400 Purifier
4.7 | 936 Reviews

Save $14 when you subscribe! Filter out smoke, dust, pollen and everything you don’t want to inhale. Clean large rooms up to 1,115 sq ft automatically with the PuroAir filter.


Cancel at any time. Filters delivered every 3 months. $7 OFF

Ships by Wednesday, Oct 5th


  • Filters smoke, pollen, dust,
    odors and contaminants
  • Lab tested & proven to filter common household pollutants
  • BPA free

Cleaner air for every room.

Up to


reduction in pollen
and dust



families love

“In testing, we saw the PuroAir perform as one of the best filters available”

“picks through particles with a fine-toothed comb”

“highly effective at removing smoke and other airborne particles emitted from wildfires”

Kiss your

The average American spends 90% of their time inside and indoor air quality can be up to 2X - 5X dirtier than outdoor air. PuroAir captures everything you don’t want to inhale, so you can breathe with confidence.













Fresh Air in JUST Minutes

Get real results in just minutes. The scientifically backed PuroAir filters particles before they can reach your lungs.

Air Quality

Air Quality

For illustrative purposes only.
introducing the PuroAir filter

the mother of all air filters

PuroAir can filter particles down to 700x smaller than a human hair.

100 Day
Cleaner Air

We’re so confident that you’re going to
love your PuroAir, that we guarantee your
home or office’s air will be cleaner or
we’ll refund your money, no questions asked.

loved by 290,000+ families

4.7    (7,232 reviews)

Sherry P.

Verified buyer
3 days ago

I never write reviews but

After doing research & reading reviews, I chose this one. It is more than I expected it to be. I love the auto mode. It runs on orange, then kicks up to red when the air is dirty, then kicks back to green when air is clean. It's quiet, and makes a real difference. It's worth every penny!!!

Marsha Becker

Verified buyer
6 days ago

The winner

I needed to find an air purifier in a hurry. It had to be available, reasonably priced and most importantly user friendly with a manual and a "help" resource component. I ordered two different products and only PUROAIR met all my needs! Moments ago I reordered it because I needed two -- I've also returned the other product because it couldn't match up to PUROAIR. I can see the difference in the air.

Brooke Baisden

Verified buyer
1 week ago

Really works for dogs and smells

I was not a believer in air purifiers but after having this, I am sold! We got this for pollen season, it works. We have it set on auto mode so it will kick on higher if it detects air pollutants. When we open the door to let the dogs outside it will kick on from across the room just from the outside air. Sometimes it kicks on with cooking too when we are frying. I have checked the filter a few times since having it and it's very dirty already!

Marcos & Denise

Verified buyer
13 days ago


Almost never, except in this case, have I purchased a product that worked so well, so quickly. Installed in my den, with dust from hundreds of books and memorabilia, where two or three violent multiple sneezing attacks each day were my norm, the sneezing stopped, quickly and completely. This purifier did exactly what it promised to do! Problem solved. Excellent product!

Suzanne M.

Verified buyer
3 weeks ago

Great company and great service

First time ever using an air purifier and this one is great! It definitely lives up to the hype. We don't have allergies or any kind of breathing issues, we just wanted our home to be as clean and healthy as possible. Mission Accomplished. Wee had one issue in the beginning but customer service took care of it right away! No delay. No attitude. Just awesome service! Great company!