Tired of manual ventilation control? The Luqilo ComfoConnect liberates your Zehnder ComfoAir E300 and E400 from buttons, giving you full control over fan speed via Home Assistant automation.

This custom ESP32 PCB acts as a powerful, non-intrusive smart bridge. It is designed specifically for the Zehnder ComfoAir E300 and E400 models (not compatible with the Q-series). It allows you to transform your existing unit into a truly smart, responsive system, eliminating the need for expensive, separate adapters.

Key Features:

• Full Automation Power: Never manually adjust your ventilation again! Gain full fan speed control by overriding the unit's 0−10V input signal. Automate control completely using Home Assistant sensors and scripts. Stop pressing the button after a shower, or when cooking—let your humidity, power, or CO2 sensors do the work!

• Seamless Integration: Control the fan and read the existing Zehnder CO2​ value from the connected sensor directly within Home Assistant (via ESPHome or similar).

• Existing CO2​ Sensor Passthrough: Unique design allows you to connect your existing Zehnder CO2​ sensor (which uses a 0−10V analog signal) in between the sensor and the ComfoAir unit. The ComfoConnect reads the actual CO2​ value and can then use Home Assistant automation to send its own 0−10V signal to the unit, thus setting the fan speed.

• No Extra Power Adapter Needed: The unit conveniently draws power (12V DC) directly from the ComfoAir unit's sensor line, resulting in a cleaner, plug-and-play installation.

• Ready for Zigbee: The hardware is designed to support a dedicated Zigbee bridge module (not supported by ESPHome yet, but ready for future development).

• Easy Installation: Comes complete with a sturdy, aesthetic enclosure and clickable screw terminals for easy, secure wiring—no soldering required!

• Make your dumb HVAC smart and unlock truly dynamic, energy-efficient ventilation based on your actual home activity!

Hardware Specifications: