Some Roman villas used a hypocaust system to provide central this
[DOC] [TLE] A hypocaust was an ancient Roman system of underfloor ... - Pinterest [PAR] A hypocaust was an ancient Roman system of underfloor heating, used to heat 
houses ... Roman Mosaic Artwork -- Excavated at the Chedworth Roman Villa ..... 
system, but became a vital part in the Ancient Roman's method of central heating.