TECH ref for Part B

http://www.builditsolar.com/Projects/SpaceHeating/SolarWall/SolarWall.htm
https://www.google.co.uk/search?q=WINDOW+GAZING+WALL&safe=off&espv=2&biw=1920&bih=946&source=lnms&tbm=isch&sa=X&ei=MJvgVN2SEcX2UL2UgugK&ved=0CAYQ_AUoAQ#safe=off&tbm=isch&q=WINDOW+GLAZING+WALL+SECTION&imgdii=_&imgrc=IRMYAaAtPyGnHM%253A%3BEd1sVVPhq8uEoM%3Bhttp%253A%252F%252Fwww.builditsolar.com%252FProjects%252FSpaceHeating%252FSolarWall%252FSolarWall02.png%3Bhttp%253A%252F%252Fwww.builditsolar.com%252FProjects%252FSpaceHeating%252FSolarWall%252FSolarWall.htm%3B794%3B875