Rema is the originator of the vertical air vacuum, and has been manufacturing durable, quality equipment since 1947 Rema Dri-Vac’s air vacuums are made to last and last! The jet aircraft-type aluminum turbine assemblies can’t rust. Top and bottom castings are quality turned. Impellers are flush welded and precision balanced – no rivets, nothing to create air drag. The 12 gauge steel condenser tanks are specially treated to resist corrosion.