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.
Radiant Heating - Floor, Walls or Ceiling?
This is an interesting article by F. W. Hutchinson, from Heating, Piping and Air Conditioning magazine, March 1946. He tells how to choose proper location for panel heating. Special thanks to Jim Walls for finding and scanning this one.
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