[arcticdude]

It's really a very simple system.  There is a cosmetic grill that shows on the inside ceiling of the slide and a 4" computer fan mounted on the outer ceiling of the slide.  This is the cosmetic roof, not the actual metal structural roof.  You could easily do this with hidden switches with just a power feed. These are controlled by a wall switch in the Intellitec system, but a simple toggle mounted up next to one of the fans would work just as well. There are 3 fans on the dinette/living room slide side and just 2 fans on the living room/kitchen slide side.