I think a blower like Grainger's Dayton 2C647 at $76.80 would be better. It has a 134 CFM at 0" SP (restriction) which when the air inlet /outlet are full open is what you'd get. Then put a damper on the inlet to adjust air flow, not the outlet. It will work either way but is easier to make a adjustable flap to open or close as needed and it seems to stay in place better. A flapper damper in the duct leading from the outlet to the arch tends to adjust itself more than one on the inlet side. Google a Dayton 2C647 for full performance info, and this one is USA made.
Dave Klish, I recently bought a 2x6 wood fired evaporator from A&A Sheet Metal which I will be converting to oil fired
Now have solar, 2x6 finish pan, 5 bank 7x7 filter press, large water jacketed bottler, and tankless water heater.
Recently bought another Gingerich RO, this one was a 125, but a second membrane was added thus is a 250, like I had.
After running a 2x3, a 2x6, 3x8 tapping from 79 taps up to 1320 all woodfired, now I'm going to a 2x6 oil fired and a 200-425 taps.
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