Atlantic Blowers' AB-402 Three Phase/Double Stage Regenerative Blower can be used for various pressure or vacuum applications. The AB-402 produces a maximum flow of 113 CFM. The maximum pressure and vacuum is 158 inH2O and 129 inH2O respectively.The AB-402 has a power output of 3.5 HP (2.55 kW) with speeds of either 3000 or 3600 RPM (50/60 Hz dual frequency). The voltage is 220-275Î”/380-480Y with an FLA rating of 9.5Î”/5.5Y. Measuring at a distance of 3 ft. the blower will produce a noise level of 69 dbA. The inlet/outlet connection size is 1.50" female NPT.