O-E Vapor System Manual
This manual was created by O-E Specialty Manufacturing Co. and outlines how to install the "O-E" Perfect System, which is a Vapor Vacuum heating system.
Heating Ventilating Air Conditioning Guide Vol. 16 (1938)
Heating Ventilating Air Conditioning Guide Vol. 16 was published by the American Society of Heating and Ventilating Engineers in 1938. To access this book online, click here.
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