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Can an electric heater give you an electric shock?

Electric heaters are safe to use when installed correctly.
The Safety Technology Authority (Turvatekniikan keskus) monitors the electrical safety standards of heaters and gives manufacturers and heaters a certificate of safety. In Finland approved heaters are marked FI. Heaters may carry certificate labels from other countries. Heaters are connected to the mains supply in such a way that their touching metallic parts are earthed. Live components are prevented from coming into contact with one another as part of the design.