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 Dunham Victory Line
The Dunham Victory line appeared in 1943 and had to meet Government specifications since we were at war. Note how the Vari-Vac system was then called the Dunham Coordinated Heating "System."
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