Zehnder ComfoAir Q
comfoconnect
The Zehnder ComfoAir Q 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.
In Apple Home through HomeKit Bridge
What HomeKit Bridge makes of each kind of entity this integration creates, read from its source code. A device only gets the ones that apply to it.
| Entity | Shows up as | Note |
|---|---|---|
fan | Fan | |
sensor | Sensor (humidity, temperature) |
What people report
Zehnder ComfoAir Q units work through the ComfoConnect LAN C bridge, but gateway firmware R1.5.x failed to connect in late 2025.
- Works1
- Not working1
| Device | In Home Assistant | In Apple Home | What they said | Source |
|---|---|---|---|---|
| Zehnder ComfoAir Q350/450/600 | Works Local | Supported via ComfoConnect LAN C bridgeSaved copyDescription: This PR adds support for the Zehnder ComfoAir Q350/450/600 ventilation systems. You'll need a ComfoConnect LAN C bridge to interface with it. The bridge can report sensor data, and you can adjust the ventilation mode (away, low, medium and high). It's a rewrite of #7246 and has since been split into a generic `comfoconnect` component with a fan platform and an optional sensors platform. You can pass a list of sensors to the sensor platform and it will register with the bridge for those values. The component is now also using the dispatcher helper to communicate to the platforms. … Excerpt saved from GitHub on 2026-10-23. | PR #8073 · 2017-06 | |
| Zehnder ComfoConnect LAN C firmware R1.5.x | Not working | KeyError 25; entities not created on gateway firmware R1.5.xSaved copyThe problem ## Problem The official Home Assistant `comfoconnect` integration fails to connect to a Zehnder ComfoAir Q when using a ComfoConnect LAN C gateway with firmware R1.5.x. Entities are not created and Home Assistant logs show repeated connection errors. ## Environment - Home Assistant OS 16.3 - Home Assistant Core 2025.12.3 - Integration: comfoconnect (official) - Gateway: Zehnder ComfoConnect LAN C - Gateway firmware: R1.5.1 - Device: Zehnder ComfoAir Q350 - Connection method: LAN C (local IP, no PRO, no Modbus) ## Configuration [code] yaml [code] txt Exception: Not connected! … Excerpt saved from GitHub on 2026-10-23. | Issue #158972 · 2025-12 |
Gathered from GitHub issues, pull requests, discussions and docs, and from r/homeassistant. These are individual reports, so check the linked thread and the date before you buy.
How it connects
Local push
Talks to the device on your network, and the device tells Home Assistant the moment something changes.
Details
| Installs (analytics) | 252 (0.04%) |
|---|---|
| Quality scale | Legacy |
| Added in | Home Assistant 0.48 |
| Set up in the UI | No, YAML |
| Maintainers | @michaelarnauts |
In ReReHome
Whatever HomeKit Bridge shares reaches Apple Home as normal HomeKit accessories behind your Home Assistant bridge, so ReReHome shows and controls them like any other.
Bridges get their own settings page listing the accessories behind them.
