Take a stroll through HVAC history in our Heating Museum. This section of our website preserves history and answers that so-important question: What the heck is that thing? Whenever you run across anything unusual, chances are you’ll find the old literature about it right here.
William C. Wolfe's circa-1879 patent for a water feeder shows an invention that is remarkable simple and fully automatic. It's probably one of the earliest feeders to app...
Turbonics offered this unusual steam system, which Iron Fireman had come up with years before. It was called SelecTemp and offered self-modulating zone heating. Thanks to...
The McAlear Vacuum Air-line Heating System was one of the early vacuum steam heating systems. See their catalog here.
Thanks to Bob Polizzi for finding not only photos of T.J. Sullivan's vacuum regulator in place, but also its patent, which explains the entire operation of a device that ...
This catalog contains The H.B. Smith Company's complete line of boilers and radiators in 1929.
This is a catalog from the National Radiator Company from 1926 showcasing their boilers and radiators.
Here is a Capitol Boilers and Radiators catalog from the United States Radiator Corporation, printed in 1934. It features the Capitol Red Top Boilers (A Series, B Series,...
The Carton Furnace Company is located in Utica, NY and began making boilers in 1847. This is a catalog of Carton Steam and Hot Water Heaters.
Here is a chapter about air valves for heating systems from Alfred King's, Practical Heating and Ventilation, 1928.
This document about Atmospheric Pressure and Vapor Systems is from Audel's Plumber's and Steamfitter's Guide No. 3, which appeared in 1925.