PLANAR HEATING DEVICE AND SEAT WITH SAME

A planar heating device and a seat equipped with the device include: first and second warming heaters (1, 2) connected in parallel with electric power source (4); thermistor (5); thermostat (6) connected in series with second warming heater (2); a heating part, i.e. first warming heater (1), that heats thermistor (5) and thermostat (6); and controller (3) to control temperatures of first and second warming heaters (1, 2) in accordance with temperature information from thermistor (5). For a period until thermostat (6) turns off, quick-heating property is improved by energizing first and second warming heaters (1, 2).