Ancient Rome baths and public buildings were heated using a Hypocaust.
Hypocaust: a centralized heating system that produces hot air under flooring through wall spaces using a series of pipes.
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Hey. I am thinking of doing this to heat my house. What an idea! (Live in a house built by idiots).
They declined to mention that slaves powered the furnaces for the heating system, enraging the visiting visigoths, among others.
Don’t think I will find any slaves. Hard enough to find paid help.
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