Looking for a new filter?

Three ways to get hold of Smart Air replacement filters:

1. Smart Air Online Store

For English, order through our online store.

2. Weidian

Fast. Convenient. Pay on WeChat.

3. Taobao

Official Taobao store. (WeChat users: click the three dots in the upper right corner to “Open with Browser.”)

When should I change my HEPA?

We recommend changing your HEPAs every 140 days at about 8 hours a day, or every 1000 hours.

Click here to learn more about our HEPA longevity tests and how we calculated when to change your HEPA, or take a look at the graph below:


When should I change my carbon? 

Calculating the lifespan of a carbon is much more difficult because the primary source is from inside the home, and studies show that VOC levels in people’s home vary from almost no VOCs to many times the limit. In most cases, you can use your nose. It sounds un-scientific, but VOCs like benzene and formaldehyde are smellable even at very low levels. If you can smell that “new home smell” and have new furniture or recent remodeling, we suggest changing the carbon filter more often–as often as every 1-2 weeks.