Air Conditioning, Heating & Refrigeration News, Mar. 3, 2014, by Cherie Preville.
http://www.achrnews.com/articles/126051-constructing-comfort-one-tool-at-a-time

"HVAC contractors aim to make homeowners comfortable in their own houses. To achieve this goal, a growing number of contractors are extending their attention beyond basic HVAC equipment; they’re considering efficiency improvements to the entire residential structure. Once equipped with the right dose of knowledge and the proper tools, contractors are able to offer whole-house “Goldilocks” solutions: Those that fit just right."