Radiator thermostat: numbers and symbols explained

Especially in winter - when the radiator is used more often - the question of the meaning of the numbers and symbols on the thermostat arises. Errors often arise. We therefore explain everything about the radiator thermostat.

Radiator thermostat: meaning of symbols and numbers

On the thermostat, which has been standardized and commercially available for around 30 years, there are a few symbols and the numbers from 1 to 5.

• Contrary to what many think, this regulator is not just an adjusting screw that regulates the water flow in the radiator, but also a thermostat.
• It ensures that this does not have to be readjusted again and again by keeping the temperature at a set, constant level thanks to a built-in mechanism.
• Means: Once set, the temperature remains constant until the heating is turned off again.

Thermostat: that's what the numbers mean

The numbers from 1 to 5 stand for different fixed temperatures. If these numbers are below the arrow, the corresponding temperature has been set. The following temperatures are fixed:

• 1: 12 ° C
• 2: 16 ° C
• 3: 20 ° C
• 4: 24 ° C
• 5: 28 ° C

Thermostat: that's what the symbols mean

Each digit on the thermostat is separated by three small lines.
Each of these lines is assigned a temperature rise of one degree Celsius. On many models there are other symbols in addition to the lines and numbers:

• Snowflake: frost protection setting (6 ° C)
• Crescent: night temperature (14 ° C)
• Sun: basic setting (20 ° C)

Heating faster and saving energy: how it works

Basically, a higher thermostat setting does not heat the room faster. You can only influence the final temperature.

• If you want to keep your room at a constant temperature, you only need to set the thermostat once. Adjustment is not necessary due to the built-in automatic.
• In order for the room to reach the desired temperature quickly and efficiently and to keep it constant, it is important that the heating is not blocked by curtains.
• Energy saving tip: Just lowering the room temperature by 1 ° C reduces your heating costs by up to 6%.
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In the next article you will read how you can reduce your heating costs even further.

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