Warm at last! Here is the start to finish install of our new Vitodens 100W from Viessmann. Lots of the background info and the technical side were covered in a previous video but if you have any questions leave them below. Enjoy!

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In this video we install a MJZM GL-3000 WiFi wireless thermostat for a gas boiler to a Wiessmann Vitodens 100 gas boiler. The instructions may be applicable to other models of thermostats via the Open Therm technology.

Any questions – please ask in the comments. If the video was useful – like it and subscribe to my channel.

It is important the installation to be done by an experienced technician. All responsibility is yours.