Wiley Water Seal Radiator Trap Patent
This patent contains the very best description of a water seal trap's role in vapor heating. This is courtesy of Steve Pajek.
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
A Study of Radiant Baseboard Heating in the I=B=R Research Home
These tests were made during the winters of 1943-44 and 1944-45. The goal was to find a hydronic system that would work well in homes without basements, which were antici...
Bell & Gossett's Air Control Booster Package
Bell & Gossett's Air Control Booster Package was a product that never really took off. The circulator removed the air from the system. This brochure is from 1966.
Bring Comfort and Convenience to Your Home with a Utica Heating System at Reasonable Prices
Here is an informational brochure about the Utica Heating system from The Royal Heating Company that appeared in 1938. Thanks to John Mills for scanning it and sharing it...
Clow & Sons Version of the Heat Generator
Thanks to Steve Pajek for finding this patent issued in 1915. Honeywell was not the only company with a heat generator!
D & T "All-in-One" Water Heating System
This device from the D & T Manufacturing Co. is a strainer, pressure-reducing valve, bypass valve, and relief valve, all combined in one unit. Hot stuff for the time!
Design of Radiator/Convector Configurations in One- and Two-Pipe Water Installations
A big thanks to Mike Thies for scanning this rare article from Danfoss. There's a heavy emphasis on one-pipe water systems in this one. Great stuff.
Designing Simplified for Taco Venturi Systems
This Designing Simplified for Taco Venturi Systems Using Radiators, Convectors, and Baseboard document contains very easy-to-follow instructions on how to size Taco Ventu...
Eggleston Relief Device for Hot Water System Patent
This device, patented in 1905, is similar to the Honeywell Heat Generator. Thanks to Gerry Gill for finding and sharing it. Gerry points out that Lewis Eeggleston went on...
Eureka Fitting Patent
Here is the patent for the Eureka fitting, which is an early diverter tee. Thanks to Gerry Gill for finding and sharing the patent.