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Higher is the thermostat, fastest heats up the room
This is a myth that you have to stop believing, because that
way you are just wasting energy and spending more.
It is best to heat only the room where you are, that whole
House
This is another myth that will be best to banish, especially
for heating a single room must use an electric heater, which "eats
electricity". If really you need to reduce heating costs, lower the
thermostat one or two degrees.