*Model: MAM-ESP450E1 *Input Power: 220V/50Hz *Airflow (m3/h): 36,000-54,000 *Efficiency: 95% *Resistance* (Pa): <150 *Dimension (LxWxH mm): 2358x560x833 *Flange mouth dimension (AxB mm): 2111x2020 *Rated Power (w): 819