Mel I built on this solar room for heat in the winter but it became my cactus room, then filled with indian artifacts as well. It was originally a poarch, I ordered the windows custom and enclosed it...ceiling is not completed. The grate you see under the pots is 3 foot deep, filled with rocks beneath it, which capture heat all day and give it off at night. The inside finished wood is just some pine boards but I picked out the prettiest ones! It cranks out the heat as it faces South all winter sun. Had to purchase shades for certain seasons. I have never grow pot in this room but I will this winter..hope you like it..DD