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The

Radiator Valve features an

'open-window' function, which closes the valve if the room temperature is falling dramatically, thus reducing the

waisted heat if the app is set to heat a room but a window is then opened.

The heat is turned off

to the

valve for up to 30 minutes, before the valve returns to its original settings. When

open-window has been activated, the function

is then left for 45 minutes

before it can be activated again.

Pressing any buttons on the valve does not affect the open window function and the only way to clear this is to remove the batteries from the valve and put them back in after 10 seconds. Note! Be aware that the

open-window function will be affected, if curtains or furniture is covering the valve thus preventing it from detecting the decreasing temperature. The

open-window feature is activated

with temperature decrease of approx. 0.5 °C over 3 min.