Equitable Building – National Historic Mechanical Engineering Landmark
Near the front entrance – http://en.wikipedia.org/wiki/Commonwealth_Building_%28Portland,_Oregon
National Historic Mechanical Engineering Landmark
Equitable Building – Portland, Oregon
The use of heat pumps for the heating and cooling of the Equitable Building, initiated in 1948, was a pioneering achievement in the western hemisphere. The theoretical conception of the heat pump was described in a neglected book, published in 1824 and written by a young french army officer, Sadi Carnot. Its practical application on a large scale is attributable to designers J. Donald Kroeker and Ray C. Chewning; building engineer, Charles E. Graham, and architect Pietro Bellushi.