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.
Warming Buildings By Hot Water (1917)
Warming Buildings By Hot Water is "a practical treatise upon warming industrial and residential buildings, places of worship and horticultural glasshouses, heating drying-rooms, also warming by direct-indirect and indirect methods embracing all low-pressure gravity and accelerated systems and the high-pressure systems." To access this book online, click here.
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