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.
The Metal Worker (1891)
The Metal Worker, published in 1891, contains essays on house heating by steam, hot water, and hot air, with introduction and tabular comparisons. To access this book online, click HERE.
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