The Dimplex DUCH Under Cabinet Heater requires the use of a thermostat. The thermostat is a single pole unit and can control the heat anywhere between 40ºF to 85ºF (4ºC to 29ºC). This DUCHT thermostat is capable of connecting to either 120V or 240V wiring. The thermostat comes with white or black control knobs to match your grille cover.