Vaillant VR33 OpenTherm module 8000020151 for Vaillant boilers
so that they are suitable for smart thermostats such as:
- Honeywell T6 smart thermostat
- Nest Learning Thermostat
The communication module can be installed in the control cabinet of the ecoTEC classic, ecoTEC plus, ecoTEC pure and ecoFIT pro.
