Connecting a Viessmann Vitodens 100W combi boiler to Nest Thermostat with OpenTherm

Here's how I connected my Viessmann Vitodens 100W combi boiler to a Nest Thermostat with OpenTherm.

OpenTherm is a more advanced and efficient way of heating your home and hot water, and is better than a standard Nest Thermostat installation. Read the detailed description in the link at the bottom about why it is better to use OpenTherm. Also if your boiler is missing the OpenTherm wiring harness you'll find the link at the bottom too.
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#Viessmann #Vitodens100W #OpenTherm #NestThermostat #English

Links:
OpenTherm Info - https://www.trustedreviews.com/news/opentherm-may-not-get-energy-savings-deserve-3633334

X21 Cable Harness System - https://viessmanndirect.co.uk/Boilers/7543422/Control/0012/Cable-Harness-X21-7843831

Products used to film this video:

Toner USB Microphone - https://amzn.to/3f7X81y
GoPro Hero 7 - https://amzn.to/2US5Fil
Huawei Mate 10 Pro - https://amzn.to/3BSPhyB
Insta360 One Camera - https://amzn.to/3xcDHuo

Видео Connecting a Viessmann Vitodens 100W combi boiler to Nest Thermostat with OpenTherm канала Dave Does