Perfex Series 155 Magic Dial Thermostat
Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.
Dunham Heating System Handbook No. 414
Here's a link to a PDF of the Second Edition of the Dunham Handbook. Special thanks to Colin Rush, who found it and shared the news with us. There's no date on this one but it's most likely late-'30s. Dunham did a superb job of filling their handbooks with useful information.
Categories
Leave a comment
Comments by Vanilla
Related Posts
The American Society of Heating and Ventilating Engineers Guide (1929) - Hot Water Heating Systems and Piping
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...
Jarecki Radiators (1890)
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.