I still have not committed to a final design for my solar space heater. Continuing research leads to ever-changing ideas.
Today I found a document with a list of references as long as my arm, with some information that I havent found in other places. The article is available on ScienceDirect.com. Here is a direct link to the article.
Integrated collector storage solar water heaters
M. Smytha, P.C. Eamesa and B. Nortonb, ,
aCST: Centre for Sustainable Technologies, School of the Built En....

Do It Yourself Solar