What do radiator numbers mean? They show temperature, not heat level

The numbers on a radiator dial are thermostat settings, not power levels. Each value corresponds to room temperature: "2" means around 16–18°C (bedroom, kitchen), "3" means around 20–21°C (living room), "4" means around 23–24°C (bathroom), "5" means around 26–28°C. The snowflake symbol indicates standby mode (6–8°C) that protects the system from freezing. Energy auditor Dr. Eng. Tomasz Fiszer explains that the valve automatically cuts off hot water flow when the temperature near the radiator reaches the set range.

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