Electrical heating element for ventilating, heating and/or air conditioning unit

The unit has an electrical conductor (102) whose plane (P1) has positive temperature coefficient. The conductor is coupled to a power and/or control black box (104) provided with electrical connection terminals (106) and the box is integrated with an electronic card. The card and the box extend in a same plane (P2). The plane (P1) of the conductor and the plane (P2) of the card are substantially parallel. An independent claim is also included for an apparatus for heating, ventilation and/or air-conditioning for cab interior of the motor vehicle.