For Rittal TS IT racks Requires mounting onto the roof plate Protection rating: IP21 without filter mats, IP55 including filter mats (included) . Air throughput (unimpeded airflow): 500 m³/h Dimensions (W x H x D): 400 x 133 x 400 mm Temperature range: Operation (environment): -30°C to +55 °C Nominal power: 50 W Noise level: 52-56 dB(A)