In the august family handyman magazine there was an article on heating or cooling problem areas. We have a remodeled attic space that gets much hotter than the downstairs. To get it cool enough to sleep, you must set the downstairs uncomfortably low. I am wondering if a level to level ventilator that pulls air from downstairs and pushes it up to the upstairs would work or is too simple. Has anyone used these? The only one I can locate so far on line is "aireshare model ASLL"