Atlantic Blowers' ABMS-500 Three Phase/ 2 Stage Centrifugal Blower can be used for various low pressure, high airflow applications. The ABMS-500 produces a maximum flow of 464 CFM. The maximum pressure is 18.1 inH2O. The ABMS-500 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 74 dbA. The inlet size is and the outlet size is 4".