This paper comes from James Dontie of Gustavus Adolphus College. It reports on an analysis of a solar thermal combination domestic hot water and space heating system which was retrofitted into a residence in Minnesota.
The analysis attempts to distinguish between improvements to the residence’s heating system that came through using a solar thermal system instead of a conventional system, as compared to efficiencies that were the result of simply installing new equipment.
The paper finds that the system cut down on natural gas consumption by about 34% compared to the average of the previous four years, and that that number can largely be attributed to the system’s temperature control system.
Author: James H. Dontje
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