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.
This document contains the manufacturer's instructions for the HB Smith Series M450L Mills Water-Tube Boiler for automatic firing with oil or gas (Steam, Vapor, or Water ...
This document contains the jacket assembly instructions for the HB Smith Series 45 Mills Boiler (circa 1979).
This document contains the combustion chamber assembly instructions for the HB Smith Series 45 Mills Water-Tube Boiler for automatic firing with oil or gas (Steam, Vapor,...