ESPHome adds a wired connection to Duco heat-recovery ventilation systems. It changes the ventilation mode and comfort temperature, and reads the ventilation level, remaining filter time and the time left in the selected mode.
The connection also reads temperatures, humidity and carbon dioxide from attached Duco sensors. Hardware testing covers a DucoBox Energy Comfort D325; support should not be assumed for every Duco system. Pieter Kokx supplies the component and guide in his first contributions to ESPHome and its documentation.