Abstract: The conditioned seat, has at least one seat contact surface (31), the outer side of which faces towards part of a passenger in the seat. An air-conditioning device (18) supplies conditioned air to the region of the inner side of the seat contact surface (31). An electrical heating element (24) is arranged in the region of the inner side of the seat contact surface (31) for warming the seat contact surface (31). A temperature sensor (28) detects the temperature in the region of the seat contact surface (31). For achieving a fast adjustment of the seat temperature to a preset desired temperature independent from the ambient temperature a controlling system (20) is provide which is in connection both with the air-conditioning device (18) and with the electrical heating element (24) and controls these corresponding to a pre-set desired temperature value in dependence on the temperature measured by the temperature sensor (28).