PROFI 38.1 is equipped with a longlife, two-stage, by-pass motor by Domel. The machine is designed to filter the air on two levels. The first is a cyclone separator, which uses centrifugal force to accumulate dirt on the bottom of the tank. The second level of filtration is a self-cleaning, PTFE-coated, fabric filter. PROFI 38.1 might also be used with a synthetic bag as another filter, a solution that makes emptying the tank easy and hygenic. The maximum piping length for this machine is 65m with no more than 10 suction sockets. The vacuum cleaner is fitted with a universal piping connection and exhaust systems (on either side of the machine).