We moved into a house a couple years ago with an indoor pool and hot tub area. There is a FanTech updraft fan at the peak of the roof and another spot where a 2nd fan was removed at some point. It is a 12 inch opening and I would like to put in something when we redo our roof in a couple months. The fan that is there seems to be a down draft model, but wouldn't I definitely want an updraft model if I am trying to get heat out of the building mostly in the summer time? It runs on a temperature switch and during the colder months I wouldn't run it at all of course. We live in Iowa.