When I started wanting to changeover to a larger fan for my casita
, the first place I looked was fantastic fan. After I bought it, 3 speed, forward and reverse, and thermostat, I realized I would hit my head on it so started looking for a solution.
Found it under- installing a fantastic fan- page3 a riser from fiberglass tubing.perfect bought from mcmaster and away we go.
While waiting and reading found the resister and switch mod on a different site. WANDERTHEWEST.com has it under. fan-tastic vent mod from 3 to 6 speeds. In this same post is information on resisters also. This is what I used for my setup. What anyone else uses is their choice.