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ComfoAir Q firmware for Zehnder ventilation units
An experimental way into Zehnder ComfoAir Q350, Q450 and Q600 units that avoids the €330 ComfoConnect LAN C gateway, built with Claude Code.
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Credits
- Post author unshittify.dev Source ↗
Earliest dated source:
The full story
Zehnder's official way to connect a ComfoAir Q350, Q450 or Q600 ventilation unit to a network is the ComfoConnect LAN C gateway, which costs about €330 and is being phased out. Instead, a Home Assistant user wired an M5Stack NanoC6 and a CAN unit to the ventilation unit's bus with four wires, and wrote their own firmware for it with Claude Code. The unshittify write-up marks the evidence as experimental.
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Sources
From a passing comment or social post, so the details are thin.
- Bluesky: ComfoAir Q firmware: Zehnder ComfoAir Q350, Q450 and Q600 ventilation units Zehnder's own way into aPost author: unshittify.devPosted
unshittify's Bluesky post about the firmware.