Steam Heating Prepared Especially for Home Study
Here is a turn-of-the-century home-study course about steam heating from the famous International Correspondence Schools of Scranton, PA.
Heating Museum Help Topics
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.
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Recent Articles in Heating Museum
Steam-Quality Measurement
This article about steam heating is from an 1871 edition of Van Nostrand's Engineering Magazine. Note the highly critical comments regarding those who tended the boilers.
Steam Traps (1905)
Thanks to historian, Bernard Nagengast, for sharing this circa-1905 article from American Electrician magazine, which does a great job of explaining the steam traps, and ...
The Big Fault in One-Pipe Heating
In 1935, John W. Schulz, writing in Fuel Oil Journal, makes a brilliant case for looking more closely at steam systems designed with coal in mind when the time comes to s...
The Dunham Air-Line Service Valve and Its Application
This circa-1916 bulletin from C.A. Dunham Co. describes Dunham's heating product offering for a system to compete with Andrew Paul's heating system.
The Dunham Blast Trap and Its Application
This bulletin from C.A. Dunham Co. is from 1916 and features the Dunham Blast Trap and Its Application.
The Dunham Packless Inlet Valve
Packless radiator supply valves kept air from working its way into a vacuum system. This bulletin from C.A. Dunham Co.
The Dunham Reducing Pressure Valve and Vacuum Pump Governor
This bulletin from C.A. Dunham Co. is from 1916 and features the Dunham Reducing Pressure Valve and Vacuum Pump Governor.
The Dunham Vapor System
This circa-1916 bulletin contains helpful information about the Dunham Vapor Heating System. Thanks to David Cordes for sharing.
The Dunham Victory Line
The Dunham Victory line appeared in 1943 and had to meet Government specifications since we were at war. Note how the Vari-Vac system was then called the Dunham Coordinat...