Overnight gas shutoff and nightlight for stairs 1893 (also Freon 12 in 1943)
Tidbit reprinted from old Scientific American:
It was thought best to shut-off gas for lighting overnight at the meter, but then how do you find your bed? Yankee invention.
Comments
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Freon 12 definitely has an odor. Shutting off the town gas was probably to avoid everyone dying of co poisoning in their sleep.
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It's also extremely toxic when burned but we never let facts get in the way of good advertising.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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The refrigerant itself has no order, when in a system you're smelling the oil.
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It isn't in a system when it was in an air duster(freon 12) can or an electrowash(freon 113) can and it has the same odor.
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The same thing could be said of wood or plastic and those are a lot easier to construct conditions where they burn.
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R-12 has no odor. Whatever you smell is something else carried by the R-12. It may or may not be flammable I don't know but phosgene gas it a major problem.
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It has an odor according to wikipedia:
It is not flammable but will decompose if heated sufficiently.
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Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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