In 2 hours I had the knob with my 16 year old Brennwertherme Vaillant connected. Very quickly went to connect the room thermostat to the controller via Wi-Fi. The only problem is, the controller switches on the achieved target temperature of the room (eg. Living room) where the wifi thermostat is the heating off. Other premises which are connected to the same heating circuit either cold to hot. !!! Beware an open basement window can where yes wireless thermostat is to freeze the radiator lead in freezing temperatures and the setback in the living room. !!! A hot water control is not possible !!! This will continue as a priority on the programmed on local control element rhythm. positive: + Easy installation + Great app / software + Chic design negative: - Misleading promises savings and incomplete function declaration
