Patent ID: 7147039

Claim:
A heating, ventilating or air conditioning system, comprising: a blower for establishing an air flow direction; an air routing housing which extends from the blower in the airflow direction and on which the blower is mounted; an air routing device positioned in the air routing housing; a filter arranged so as to follow the air routing device, downstream in the air flow direction, wherein the air routing housing comprises two orifices located on opposite sides in the outer wall of the air routing housing with respect to one another for receiving the air routing device and for fastening the blower, respectively, wherein the air routing device is a separate element from the air routing housing and comprises a profile portion for providing uniform air distribution to the filter and a mounting portion that is configured for insertion from the outside, through and into either of said orifices to mount the air routing device and to cover the filter by closing the orifice into which the mounting portion is inserted, and wherein the air routing device is selectively mountable on the air routing housing in either of said orifices in the outer wall of the air routing housing.