The open end of the tent points toward the window, but will never have direct sunlight. I'm going to switch to a shorter extension and put on a timer (I already have both). Should I place a piece of clear plastic over the top, and drape it a little over the opening to create a trap for the warm air to stay in the tent? I'm also going to wrap a little insulation around the outlet. The hose comes from a frost-proof hydrant and travels only about 12 feet. I think I could increase the flow during the coldest part of the winter to preclude freezing. Also, if the hose did freeze I think that would be one problem that wouldn't have fatal consquences since the aerator would continue to run. Thanks for all the great responses so far!
Bruce
