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HistoryPhotos@piefed.socialEnglish · 1 year ago

Inventor Charles S. L. Baker and his assistant, posing with friction heater, USA, 1906 AD

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Inventor Charles S. L. Baker and his assistant, posing with friction heater, USA, 1906 AD

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HistoryPhotos@piefed.socialEnglish · 1 year ago

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thedeadwalking4242@lemmy.world
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1 year ago
All heaters are 100% efficient. Everything turns into heat eventually
- GreyEyedGhost@lemmy.ca
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  1 year ago
  Heat pumps are more than 100% efficient (if you consider the frame of reference to be the area whose temperature you want to control).

HistoryPhotos@piefed.social

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HistoryPhotos is for photographs (or, if it can be found, film) of the past, recent or distant! Give us a little snapshot of history!

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No genocide or atrocity denialism.
Photos MUST be at LEAST 10 years old, and ideally over 20. We appreciate that we are living through events which will become history, but this is ultimately not a comm for news or current affairs, but events which have occurred some time in the past.

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