Around here at historic houses there are often pit green houses. These are maybe 12 by 12 feet with sashes faced to the south. The one across the street from me is made of brick, with a single large south-facing sash ---maybe 12ft wide by 14 ft tall-- like a huge chicken coop.
This is not exactly what we have locally, but the idea is similar.
http://www.inspirationgreen.co...
