Abstract: For the filtering of supply air, especially in the case of motor vehicles, a filter that is divided into two parts is arranged inside a housing. The two parts of the filter can be swivelled apart around swivel shafts arranged in their end areas so that, when required, an air passage means can be exposed for the passage of unfiltered air.

Abstract: Disclosed is a heater for installation on the floor or in the side walls of a motor vehicle. The heater installation comprises a first rigid plate and a second rigid plate which is firmly joined to the first rigid plate. One plate comprises a plastic material. In addition, a channel for a liquid medium is disposed between the plates and has at least one indentation therein. The heater also has an inflow pipe and an outflow pipe, wherein the channel extends from the inflow pipe to the outflow pipe.

Abstract: A housing for a heating or air conditioning unit for a motor vehicle is provided, which housing is disposed under the windshield at the middle of the vehicle and includes portions extending adjacent the lower or passenger foot region. This housing is provided with air outlet nozzles for directing warm (or cooled) air into the passenger foot region. The housing includes two upper housing parts separated by a separation plane extending perpendicular to the vehicle travel direction and a lower foot level housing part for the air outlets at the foot level. These three separate housing parts are form fittingly assembled together by slidably interengageable housing parts. With this arrangement, the foot level housing part can be assembled with the other housing parts without the need of additional work tools and is so integrated into the complete housing assembly that, with the slidable connection of the housing parts together, the foot level housing part is also securely and rigidly assembled.