Did you know back in 1977 a mechanical engineer who specialized in energy conservation in buildings, Laurence Spielvogel at that time showed how home builders could cut HVAC energy loss by 20 to 40 %. P Eng. Spielvogel has a Bachelor of Science in Mechanical Engineering, Drexel University, 1962 and he was an Assistant post engineer at the Walter Reed Medical Center, Washington, 1963-1965; an engineer for the Utility Survey Corporation, Chicago, 1965-1966; and an associate, Werden & Association,…