Atlantic Blowers' AB-81 Single Phase/Single Stage Regenerative Blower can be used for various pressure or vacuum applications. The AB-81 produces a maximum flow of 25 CFM. The maximum pressure and vacuum is 28 inH2O and 28 inH2O respectively.The AB-81 has a power output of 0.25 HP (0.18 kW) with speeds of either 3000 or 3600 RPM (50/60 Hz dual frequency). The voltage is 110-120Î”/220-240Y with an FLA rating of 2.5Î”/1.1Y. Measuring at a distance of 3 ft. the blower will produce a noise level of 53 dbA. The inlet/outlet connection size is 1.00" female NPT.