The In-Air-Rid Vent is one of the finest steam-heating products ever made. In this patent, L.M. Stadelhofer says of his radiator and air valve, "My invention relates to new and useful improvements in valves for venting air from heating radiators." Thanks to Gerry Gill for all his hard work in coming up with the patent.
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...