Paul,
No rapping on my porch, I'm kind of partial to classic rock/w3tcompact/icons/cool.gif. Sorry, couldn't resist. Actually, only the part on the (left) end of the house is a porch. It's about 10'x18'. The part under the shed roof across the front is a sun room to the left of the front door and the kitchen to the right of the front door. I haven't done the calculations yet, but I hope to get a good bit of solar gain from the sun room in the winter. The overhangs on the front are 2' to keep the sun out in the summer.
Scott