Underfloor heating can be traced back many thousands of years to present-day North Korea. Known as ‘ondol’ underfloor heating, wood smoke was used to heat the underside of masonry floors.
Earliest record of underfloor heating
Underfloor heating can be traced back many thousands of years to present-day North Korea. Known as ‘ondol’ underfloor heating, wood smoke was used to heat the underside of masonry floors.