Two inlets 160mm. The filter unit is made of a stable steel sheet construction. The complete powder coating of the housing guarantees a maintenance-free operation even under hard operating conditions.Technical data Fan performance m/h 3.500. Pressure Pa 2.500. Pre-filter M5. Main-filter F9. Motor performance kW 2,2. Power supply V/Hz 400 / 50. Power intake A 5. Type of current 3PhNPE. Noise level dBA ca. 72. Measurements W x D x H mm 665 x 681 x 995. Weight kg approx. 136.