I will be constructing my coup over the next month or two and have decided to include a solar thermal forced air heater that can provide day time heat for my house in the winter. This will go on top of the slant to roof. http://www.coloradowindpower.com/page.php?26 Please read to learn the general concepts. Any additional plan suggestions are welcome The general concept is very simple. 2 holes on a box. Cold air comes in a hole on the bottom and hot air goes out a hole on the top of the box. The sun heats up the air in the box as it passes over black Sheet metal or soda cans inside the box. Black color attracts heat and the metal holds the heat. Some models use a vacume tube to vent the warmed air inside the house. You can use a small solar fan to suck air in the hole on the bottom of the box. The air in the box can heat up to 110 degrees. That free hot air is a big help heating a house on a cold winter day. http://www.motherearthnews.com/library/1977_September_October/Mother_s__Heat_Grabber_ http://blog.hemmings.com/index.php/2007/04/26/almost-free-garage-heat-just-drink-a-lot-of-soda/ http://builditsolar.com/Projects/SpaceHeating/Space_Heating.htm Other features I decided to include are a door backing up to my bedroom window as well so I can just open my window to collect eggs.