Atlantic Blowers' AB-900 Three Phase/Single Stage Regenerative Blower can be used for various pressure or vacuum applications. The AB-900 produces a maximum flow of 399 CFM. The maximum pressure and vacuum is 177 inH2O and 141 inH2O respectively.The AB-900 has a power output of 11.5 HP (8.6 kW) with speeds of either 3000 or 3600 RPM (50/60 Hz dual frequency). The voltage is 220-275Δ/380-480Y with an FLA rating of 29.0Δ/14.3Y. Measuring at a distance of 3 ft. the blower will produce a noise level of 80 dbA. The inlet/outlet connection size is 2.50" female NPT.