By connecting to an external VOC (Volatile Organic Compounds) sensor or CO2 sensor, your thermostat shows the room air quality via three status symbols on the local idle screen. In the mobile app, the status is indicated by text instead.

Symbol on the local idle screen

Text in the mobile app

Description

VOC level
[% of the output range]

Good

The room air quality is good

<50%

Okay

The room air quality is okay

50% ~ 80%

Poor

The room air quality is poor

>80%

In order to ensure that the room air quality is measured accurately when the room is closed for a long time, it is recommended to force air circulation such as opening a window.