Not much is commonly known about the importance of the quality of the air we breathe. Unfortunately, probably most of our time is spent in places that do not have clean air. This can be our home (yes! a lot of pollutants are found in-door), office, car or even our back yard.

That’s why I’ve recently decided to purchase an air purifier for my house. After some research, I found that the Mi Air Purifier 3H answers most of my requirements. I’ve read that it can interface with Home Assistant via the Xiaomi integration.

Messurements: Height: 55 cm, width and length: 24 cm.

The cable length is around half a meter. No cable management is present.

Pros

• Can easily integrate with Home Assistant and be compatible with all other automation/integrations. For instance, you can turn the devices off when no one is home, or turn it on when particle count reaches a certain level. You can even make sure that it’s off when the Vacuum cleans the house. Xiaomi opened all the settings to be controlled natively with the Home Assistant integration like child lock control, dimming of the screen, fan levels, custom modes, etc.
• It’s practically silent. On the auto fan mode, you can barely hear it. the sound becomes more obvious the higher the fan goes, and the max level is very noisy, but also provides a very strong and quick cleaning.
• The air quality is absolutely excellent. I have a few Air quality monitors with different types of sensors, and every one of them reported very clean air after some time of use. I even put them directly on the air purifier and got great results. It uses one of the best class filters (HEPA-13) so it seems to do its job.

Cons

• The biggest one is probably the cost, both for the device and the filters (if you want to get the true HEPA-13 class), and the app reports when you should replace it. Expect 3-6 months of usage from the filter, which costs around 50$.

Example automation I use:

• turn off the display at night completely, as it’s situated in the bedroom.
• turn off the device when there is no one home.
• turn it on in the evening when we come home.