Marsh System of Vapor Heating
This document outlines the Marsh System of Vapor Heating from JAS. P. Marsh Corporation of Chicago.
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
McDonnell & Miller 101-A Automatic Feeder Patent
This circa-1940 patent is for McDonnell & Miller's 101-A Automatic Feeder. Thanks to Gerry Gill for finding and sharing this patent.
MEPCO Steam Traps
MEPCO Steam Traps were widely used on the Dunham-Bush Vari-Vac system. Thanks to Brad White for sharing this information with us.
Milwaukee Valve Company Bulletin (1935)
Here is some very good literature on the Milwaukee Valve Company's vapor heating product offering from 1935, including the MILVACO Air Line Valve, the Type "M" Boiler Ret...
Moline System of Heating Booklet and Patents
The Moline System of Heating was a famous vapor heating system, named for the Illinois city. There is no date on this booklet, but it is probably from around 1915. Specia...
Vapor Heating: The Mouat Vapor System
The Mouat Vapor System was one of the classics of vapor heating! Here is an excerpt from The Heating and Ventilating Magazine explaining how this system works. And you'll...
Murray Heating System Patent
Here is the patent for an interesting piping system, offered by the Murrays, father and son. Gerry Gill, who found and shares this with us, comments, "This patent lists b...
Ninety People Attend Luncheon Inside Boiler
This article is from Combustion magazine in January 1930. These boilers heated many a New Yorker.
Noiseless Steam Heating System
Here's a playful article from The Craftsman magazine (May 1914), published during a time when vapor/vacuum heating was just coming into its own. One of the huge advantage...
Norwall Manufacturing Company
The Norwall Manufacturing Company made a variety of products for vacuum steam heating systems. This document about their automatic air valves is from 1906.