I HATE FANTASTIC FAN!

I've had several Fantastic Fans in the past with good luck, last motorhome I put in a MaxxAir with variable speed and actually liked it a bit more since the speed was continuously variable, you can dial the speed down to really slow if needed. Recently with my 3rd motorhome acquisition, it had a Fantastic fan in the bedroom but a standard, noisy Ventline with the tiny 6" fan blade in the bath. I purchased a Vortex vent conversion and modified it by adding a 12V motor speed controller (ebay $5) and it works nearly as well as the Fantastic or MaxxAir for about $50. It can now be slowed down like the MaxxAir. Fantastic uses resistors to achieve the 3 speeds which is not as efficient as a variable speed electronic controller.
Adding the 12v speed controller is very straightforward for any fan, here is the one I used: www.ebay.com/itm/231098212128