Filter assembly for protecting motor vehicle occupants from pollution

Abstract From the Canadian patent

This invention is a filter assembly to be installed in passenger motor vehicles for the protection of the occupants from pollution originating from either exterior the vehicle and/or interior the vehicle. The assembly is preferably installed in the plenum of the vent which is connected to the cowl plenum chamber of the vehicle's heating-cooling system. The assembly is also preferably equipped with a sensor switch that notifies the driver whenever the filter becomes dirty and must be replaced. The assembly includes a hot fluid heater such as a hot water heater, which protects the filter from freezing and keeps the filter dry. The assembly prevents pollutants, which are emitted from the …