"I built a new home in the early 80's that that was designed with passive as well as active elements, including a subfloor plenum for thermal storage. My recent research is turning up lots of data from the 70's when this movement began, but…"
"I agree on the role of architects guiding the design for energy efficiency. They have the most influence at an early stage of design. Being careful that the structural engineer doesn't undo efficiency with thermal bridging is important too. So…"