Modern engineers have rediscovered ideas that were proposed and even used as long as 150 years ago. Exposes some of the innovations of yesterday that are being used today. Examples include baseboard radiation for space heating, counterflow heat exchangers for refrigeration, and air-to-air heat exchangers for energy savings.

KEYWORDS: year 1995, history, skirting heating, counterflow heat exchangers, air air heat exchangers, heat exchangers, engineers.