This excerpt is from The Ideal Fitter (1922). You'll find indirect radiators (both steam and hot water) within basement ductwork. Often, there is a connection to outside air, and warm-air discharge to floor- or wall grates in the rooms.
This booklet from 1905 showcases how American Radiator Company's radiators could become decorative pieces in a home. It highlights the "beauty in modern radiators" of tha...
American Radiator Company manufactured their Colonial Wall Radiators around 1905. The document attached below is an excerpt from The Ideal Fitter (1905) that states "The ...
Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.