Fan assembly for cabin filtration

The assembly (10) has a receptacle housing (14) which is arranged with a fan (20) for generating a pressure difference between a suction side (30) and a pressure side (32). A blow-off port (34) is in fluid permeable connection with the fan. The openings (36,38) are provided in the filter elements (40,42). The blower is pivotably arranged in a receiving housing. The filter elements are fluid permeable to the pressure side portion of the fan, when an insert (18) is operated between different reverse positions. Independent claims are included for the following: (1) agricultural motor vehicle; and (2) method for purifying motor vehicle cabin.