Turning sunroom into Passive Solar source..
I am working on turning a sunroom that is about 180 square feet into a more effective source of energy. I live in Zionsville Indiana, so there is some sun.
Currently the room mostly faces West, South, and has a sliding door on the North side. There is roof overhang and large desiduous trees to the west, which help shade the room in the summer. The East side has a 9 foot wide opening into the main living area of our home. The exterior walls of the sunroom are all sliding glass doors, there must be 8 of them. There is a ceiling fan, and several electrical outlets, the floor is tiled. There is a return above the interior doorway and three vents on the floor that go to the furnace. We have just been using blinds to open up the room with the fan during the day and the furnace rarely kicks on. It is about 30-45 degrees lately, and we set our thermostat to 70.
I plan to close the room off with frenchdoors and to further insulate the house as the sunroom is almost all glass. I am looking for advice on what to do with the return and vents in the sunroom. We have always just had them closed, I am thinking I might be able to use them. The floor is just ceramic tile and there is a crawl space under the room. Would it make sencse to add a layer of tile/flooring? Could I insulate below the floor in the crawlspace? I am in the process of getting the french doors, should I go with low e-glass? How do I tell if all these glass sliding doors that make up the current walls are worth keeping? They are probably 18 years old and double paned.
So if your still reading, thank you!! Any words of wisdom would be welcome!!