An ancient Roman underfloor heating system called hypocaust was utilized to provide hot air to buildings. In his writings from the end of the first century BC, the Roman architect Vitruvius credits Sergius Orata with their invention. There are several Roman hypocaust remnants that can be found in northern Africa, western Asia, and Europe. The hypocaust was a precursor to contemporary central heating and an invention that enhanced public health and living circumstances. Hot baths, or thermae, as ... (Read More)