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Koen
Don't. Get a proper boiler. So.many issues with it not reading the temp.. randomly turns on and you can't shut it off with app even when u set the temp low. Only way is on the boiler itself. The app is stupidity designed . No boost button . Once u change the temp for little heat it changes the setting of program. Typical German idiotic
6 months ago
Viessmann Limited has a 4.3 average rating from 1,052 reviews

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