Deltec Homes, Renew Collection, "Ridgeline" (B) 1604sf ~ Passive solar layout, vaulted ceilings & high clerestory windows. Uses 2/3 less energy than typical home, can achieve net-zero energy. Shell price according to South or North energy modeling: Pre-painted Allura fiber cement siding, window & door package, floor system, advanced wall system & energy modeling for your climate. *See completed Ridgeline: http://www.deltechomes.com/an-update-on-the-first-renew-collection-home/
The sun 'travels' different paths throughout the season. The summer sun is high, while the winter sun is low. Passive solar design situates the house and is built with certain materials to help it to be warm in the winter and cool in the summer.
A Trombe wall is a passive solar building technique where a wall is built on the winter sun side of a building with a glass external layer and a high heat capacity internal layer separated by a layer of air. Heat in close to UV spectrum passes through the glass almost unhindered then is absorbed by the wall that then re-radiates in the far infrared spectrum which does not pass back through the glass easily, hence heating the inside of the building.
Good, clear presentation of Seasonal Window Considerations for Passive Solar homes. Windows must be climate sensitive: check to see if they show be double or triple paned, or even covered with a thermal shade in coldest climates.