I never thought this thing would actually heat up my farm tractor cab, I was just hoping it would keep the rear window from freezing over when I snowed rooms. And it is. My snowblower is rear mounted, so I look back and breathe at the rear window, which doesn't have a de-icer. Of course, this is a recipe for misting and icing glasses. As long as the fan outlet is close enough to the glass, it will keep the window clean. The fan performs decently when the heating element is not on, but airflow…