What do the numbers on the radiator thermostat mean?

If you turn it up, it will (hopefully) get warmer—so far, so good. But what temperature do the numbers on the thermostat stand for? Here is a brief overview:Asterisk: around 5 degrees, protects the heating from frostLevel 1: around 12 degreesLevel 2: around 16 degreesLevel 3: around 20 degreesLevel 4: around 24 degreesLevel 5: around 28 degreesSun: It stands for a basic setting at 20 degreesHalf moon: It stands for a night setback at 14 degreesIn an average household in Austria, around half of the energy consumed is used for…

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