Arco's Ventilorad Radiator Booster was an electric heat booster for ordinary radiator. Here is the literature from 1937, along with a letter to wholesale distributors from A. R. Herske, Vice President and General Sales Manager of the American Radiator Company. It essentially turns a radiator into a fan-coil unit.
The Improved Webster Type "R" System of Steam Heating is a service bulletin from Warren Webster and Company (The Pioneers of Vacuum Steam Heating), established in 1888.
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.
Here is the original Installation and Operating Instructions and Parts List for The H.B. Smith Company's Oil Fired Cast Iron Hot Water Boilers (No. OHB-13W). This is esti...