The RTD Models are European set up for 50 cycles of A/C electricity. The USA uses 60 cycles. Using the 50 cycle unit will work, and you will actually get a few more RPS/Output, but the lifespan will be much shorter and make sure it is in a fireproof enclosure because it'll get damned hot!

Some of the best Gast Units are the 71R, 72R, and 75R twin cylinder models, in ascending CFM maximum order. The 75R models are awesome!

Last edited by Rainman; 04/10/15 05:00 PM.