Airgradient's popular indoor air quality sensors are the first devices of their kind to be officially certified as "Works with Home Assistant". These open-source devices do not require an internet connection and enable local automation with air purifiers, air conditioners, or humidifiers and dehumidifiers.
Hm, I guess the certification is new, but Air Gradient has been working great with HA for a while now. Great sensors and open source software and hardware.