Heat Loss Calculation Guide H-21

First Edition, August 1965, Sixth Printing, 1978. 95 Pages long. The Hydronics Institute, Berkeley Heights, NJ.The Hydronics Institute is a non-profit organization established for the purpose of improving and promoting the use of hydronic (steam and hot water) heating and allied cooling systems. The technical material published by the Institute, besides being founded on research, represents the consensus of the outstanding engineers in the industry.