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.
This book from The Institute of Boiler and Radiator Manufacturers called I=B=R Installation Guide (Number 2): One Pipe Steam Heating Systems was published in March, 1946....
This is an excerpt from The Heating and Ventilating Magazine, published around 1910. It covers The Ideal System of Vapor Heating from the Ideal Heating Equipment Company ...
This document is from the Illinois Engineering Co. and provides information about Illinois Heating Systems, packless radiator valves, thermostatic traps, the standard vac...
The Imico System was a rare vapor heating system. "There is no air valve at the radiators in this system and no trap on the return end of the individual radiator. Vacuum ...
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 n...
Here is a very clear explanation of how bucket traps work, what goes wrong, and how to avoid problems. Austin Roche, Hoffman Specialty's Chief Engineer, wrote this in Mar...
Unfortunately we don't have a source for this article called "It's All in the Venting" by John Schulz, but it's probably one of the best articles we've ever read on air v...
This book is from the Johnson Vapor Heating Company in Boston, MA. It is not dated, but is most likely from the very early 20th Century. Thanks to Brian Reynolds for shar...
Johnson Vapor Heating Systems was of the more obscure systems from the Turn of the Century. This bulletin from Johnson Vapor Heating Co. outlines how the system works.
Here are circa-1909 patents for H.K & I.Z. Kriebel's air and vacuum controlling device, as well as their system of steam heating and air and vacuum controlling device, au...