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.
Herman Nelson Invisible Radiators
This circa-1930 book shows the ratings for Herman Nelson Invisible Radiators, which were radiators that are inside the walls. This document was scanned and shared by our good friend, Frank "Steamhead" Wilsey.
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