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.
Hoffman Heating Equipment Catalog (1929)
This catalog for the Hoffman Specialty Company from 1929 showcases their heating equipment, including Hoffman valves, Hoffman controlled heat, Hoffman-Economy pumps, and Hoffman Moto-Heaters. It is a glimpse of what Hoffman Heating had to offer at the start of the Great Depression. There are products in this catalog that we did not know they made. Great descriptions all around!
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