This document is from the sales department at the Hoffman Specialty Co. in 1926. It showcases Hoffman Valves and Controlled Heat Equipment with cutaway diagrams of how the Hoffman No. 2 Vacuum Valve operates. There is also information on how to "vacuum-ize" a one-pipe steam system, the No. 7 Hoffman Adjustable Modulating Valve, Nos. 8 and 9 Hoffman Return Line Valves, the Hoffman Blast Trap, the Hoffman Ther-Kompo Gage, and the Hoffman Differential Loop. And there are diagrams outlining the typical installations of Hoffman "Controlled Heat" Equipment.
This chapter on hot water heating systems and piping was prepared by Professor F.E. Giesecke (Director of Texas Engineering Experiment Station in TX) for the The American...
Here are ratings for the Erie radiator from Jarecki Mfg Co Ltd. They were based in Erie, PA and their radiators appeared in issues of Domestic Engineering in the 1890s.
Brian Roberts & Paul Yunnie compiled this document that contains beautiful vintage advertisements and illustrations of radiators from the mid to late 1800s and early 1900...