Air Supply of The Future, R4P115 Regenair® R4 Regenerative Blower; 1.5 hp, 1-Phase, 115/230V with a rugged construction that's suitable for demanding applications, the R4P offers oil-less operation ensuring that the discharge air remains free of contamination. The R4P can be mounted in any plane, which provides flexibility when mounting or integrating the blower into an OEM system. In addition, these blowers have very few moving parts and no wearing components, which minimize downtime and helps to lessen operating noise levels.