This is an excerpt from Rolla Carpenter's "Heating & Ventilating Buildings" with a table about Experiments on Different Steam-Heated Surfaces and Different Materials (Wrought-Iron, Cast-Iron, Steel, and Brass Pipes. Corrugated, Ringed, and Plain Surfaces). This includes ratings for radiators from the 1800s including the Clogston, Walworth, Union, Triumph, Peirce Excelsior, Gold's Pin Indirect Radiator, Howard Oxbow Radiator, among others.
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...