Zehnder ComfoAir Q

The comfoconnect integration lets you control Zehnder ComfoAir Q350/Q450/Q600 ventilation units from Home Assistant. You need a ComfoConnect LAN C bridge to connect the unit to your local network.

There is an official iPhone and Android app to configure and control your unit. This platform connects with the help of the unofficial pycomfoconnect library.

The integration has a fan platform to view and control the ventilation speed, and a sensors platform to read out the outdoor temperature and humidity, the indoor temperature and humidity, and the extract and supply air flow (in m³ per hour).

To set it up, add the following information to your configuration.yaml file:

  host: IP_ADDRESS

Configuration Variables

host string Required

The IP or hostname of the ComfoConnect LAN C bridge.

name string (Optional, default: ComfoAirQ)

The name of this device as you want to see it in Home Assistant.

token string (Optional)

The token you want to use when registering with the device. This is a random 32 char hexadecimal string.



user_agent string (Optional)

The name you want to supply when registering with the device.


Home Assistant

pin integer (Optional, default: 0000)

The pin code to use when registering. You only need to change this if you have changed the factory default pin.

To register the sensors, add the following to your configuration.yaml file:

  - platform: comfoconnect
      - air_flow_exhaust
      - air_flow_supply
      - bypass_state
      - current_humidity
      - current_rmot
      - current_temperature
      - days_to_replace_filter
      - exhaust_fan_duty
      - exhaust_fan_speed
      - exhaust_humidity
      - exhaust_temperature
      - outside_humidity
      - outside_temperature
      - power_total
      - power_usage
      - preheater_power_total
      - preheater_power_usage
      - supply_fan_duty
      - supply_fan_speed
      - supply_humidity
      - supply_temperature

The list above indicates all supported sensors. It is recommended to only include the ones you need.

Note that multiple connections to the bridge only work version >= U1.2.6 of the ComfoConnect LAN C bridge. In older versions it's not possible to have multiple connections to the bridge at the same time. This integration will then keep the connection open, and if you open the app, it will ask you to disconnect Home Assistant. If you close the app again, Home Assistant will reconnect automatically.