Atlantic Blowers' ABMS-400 Three Phase/ 5 Stage Centrifugal Blower can be used for various low pressure, high airflow applications. The ABMS-400 produces a maximum flow of 304 CFM. The maximum pressure is 24.1 inH2O. The ABMS-400 has a power output of 1 HP (0.75 kW) with speeds of either 3000 or 3600 RPM (50/60 Hz dual frequency). The voltage is 220-275/380-480 with an FLA rating of 3.3âˆ†/1.7Y. Measuring at a distance of 3 ft. the blower will produce a noise level of 70 dbA. The inlet size is and the outlet size is 3".