Patent ID: 7900688

Claim:
An air heater for heating passenger compartments of motor vehicles heated by a conventional heater and for defrosting windscreens of vehicles, comprising a bell housing attached to an exhaust fume output manifold of vehicle engine for collecting hot air, linked by an air hose to a turbine or an extractor which, by way of at least one pipe, forces hot air into the vehicle's compartment, to front and rear screens or exterior rear view mirrors a thermostat for shutting off the vehicle's air heater and switching over to the vehicle's conventional heater by means of a manual or electrically-operated butterfly valve, and stopping the turbine a CO 2 detector that shuts off the turbine or extractor which operates an air flow shut-off valve and activates a warning light and/or buzzer in the compartment, and includes a central electronic unit for controlling operation.