Here are photos of a circa-1944 Perfex Series 155 Magic Dial Thermostat, as well as the instruction manual.
Beacon Boiler Reference Book, Boilers Made Between 1959 and 1972, Part 3
This is an excerpt from the Beacon Boiler Reference Book and includes ratings for boilers made between 1959 and 1972. This section contains pages A44 through A62 and includes ratings for these manufacturers: Marietta Metal Products Co., Mueller Climatrol, National U.S., New Yorker Steel Boiler, Paragon Oil Co., and Peerless Heater Co.
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Perfex Series 155 Magic Dial Thermostat
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)
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