Bingo. We've got 2 Maxxair fans but one of the best things we did is hang a magnetic screen door in the back emergency door and put screens in the windows. It keeps the inside temps right around the temp outside.
Did you make your own screens or find a good off-the-shelf option?
Made our own. The screen for the back door we bought, it's one that has magnets down the middle so that it closes on it's own after you pass though. Kristen hemmed so that it would fit correctly.