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The disadvantage is it will reduce battery life as the radiator valve will be running from open to fully closed more often, and it may be confusing to a user as to why the valve shows 4º when this is not part of the heating schedule.
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The Genius Hub can automatically calculate the pre-heat duration for a chosen room, so that the room will reach the set temperature at the start of the ‘heating period’, rather than starting to heat up at that time. Your Genius Hub is adaptive, so it's always learning from the temperature recorded by each temperature sensor. Using the local weather data and the heating history for each room, it will constantly adjust the pre-heat duration as the weather changes. This means that when you look at the automatically calculated time you see a value that is looking at the current measured temperature in the room, the current external temperature and the next heating period target temperature (not the default temperature as this is ignored). When calculating the next pre-heat time it takes into account a number of factors such as the lag time (how long it takes for the heating system to respond after the heating system is started to be heated) and rise rate (which is the speed that the room heats once it has started to rise in temperature). The default setting for pre-heating is disabled.
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