Kind of in the same situation. I have a back porch that I don't want to close in with permanent means, but I want to get some clear plastic/canvas edged siding to put around the porch (kind of like the flying saucer downtown if you've ever been). That way I could put some kind heater in there and there might be a little bit of heat retention and less wind.
Also, anybody have any idea what those would be called so I could search for a place that sells them? lol
(sorry to potentially threadjack)