The combined heat and humidity cycles of being on a roof would be quite damaging to any electro-mechanical machine. Especially one that isn't designed for that

The combined heat and humidity cycles of being on a roof would be quite damaging to any electro-mechanical machine. Especially one that isn't designed for that kind of environment. I'd be surprised if a PC fan made it more than 2 or 3 years in that environment. Probably depends a lot on the specific climate though.