Systems Help Center

Here is a chapter about air valves for heating systems from Alfred King's, Practical Heating and Ventilation, 1928.

This document about Atmospheric Pressure and Vapor Systems is from Audel's Plumber's and Steamfitter's Guide No. 3, which appeared in 1925.

Walter S. Finken sold KEK, a boiler cleaner. In this treatise, he explains how dirty water leads to wet steam and plenty of system problems. Thanks to Alex Marx for scann...

This document from the Bishop & Babcock Manufacturing Company showcases their vacuum vapor system of steam circulation. Thanks to Patrick Linhardt for scanning and sharin...

This document from October 6, 1924, outlines specifications for the Broomell System of heating. Thanks to Brian Reynolds who bought this rare document on eBay from the gr...

Thanks to Robert O'Connor of New Jersey for sharing these photos of a Broomell heating system.

Here are some notes about the Broomell System of Vapor Heating. Thanks to Patrick Linhardt for scanning and sharing this.

Here are patents from the early 1900s for the Broomell heating system. Thanks to Gerry Gill for finding and sharing these patents. It's a wonderful walk through heating h...

Here is a patent for a trap bushing for radiators from F.J. Vaux in January 3, 1922. This one could easily stump you if you didn't know it was in there.

William J. Baldwin answers the question about steam pipes and fire once and for all in his classic 1897 text, Baldwin on Heating.