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Here is an excerpt from the 1925 edition of The Ideal Fitter (from the American Radiator Company) featuring Peerless curved, corner, 45-degree angle, pantry, and circular...

This chart is from the U.S. Department of Commerce’s National Bureau of Standards, published on July 19, 1935. For a number of years this subject has received considerabl...

This circa-1901 booklet from The Dominion Radiator Company out of Toronto, Canada is a joy to read and is beautifully illustrated. It's early-20th-Century marketing at it...

Here is the Exeter Radiator and the Matthews' Radiator Foot Rests from the Walworth Manufacturing Company (1842-1892). Thanks to Frank "Steamhead" Wilsey for finding and ...

Thanks to Gerry Gill for sharing this Mouat Vapor Heating System proposal from the early days of steam heating. Note the nine-ounce setting on the relief valve. You don't...

A Rudimentary Treatise On Warming and Ventilation was written by Charles Tomlinson in 1858 about heating systems of the time in domestic and public buildings and more. To...

A Practical Treatise Upon Warming Buildings By Hot Water was written by Charles Hood in 1894 and was an enquiry respecting ventilation, the cause and action of draughts i...

The American Society Of Heating And Ventilating Engineers Guide (Volume 13) from 1935 contains reference data on the design and specification of heating and ventilating s...

Here some terrific cutaway views of radiator supply valves, including the Gorton Quarter Turn Packing Lock Radiator Valve, from Gorton & Lidgerwood Co. of New York. Thank...

This circa-1927 book from the Gurney Foundry Company contains information about Gurney boilers, radiators, and water heaters. Thanks to Bob Moore for scanning and sharing...