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...
SelecTemp Modulating Zone Heating
Turbonics offered this unusual steam system, which Iron Fireman had come up with years before. It was called SelecTemp and offered self-modulating zone heating. Thanks to Gerry Gill for finding and sharing the document on The Wall, and to Frank "Steamhead" Wilsey for bringing it up again years later.
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