Atlantic Blowers' ABAF-18-220S Three Phase Axial Fan can be used for various low pressure, high airflow applications. The ABAF-18-220S produces a maximum flow of 4414 CFM. The maximum pressure is 1.6 inH2O. The ABAF-18-220S 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 220V-275V. Measuring at a distance of 3 ft. the fan will produce a noise level of 70 dbA. The impeller diameter is 18".