Central Heating Underfloor Systems (Hydronic systems) can use a single source or combination of energy sources to help manage energy costs.
Underfloor Heating System use water or a mix of water and anti-freeze  as the heat transfer fluid in a "closed loop" that is recirculated between the floor and the boiler. Various types of pipes are available specifically for underfloor heating and are generally made from polyethylene including PEX, PEX-Al-PEX and PERT. Underfloor Heating systems require skilled designers and tradespeople familiar with boilers, circulators, controls, fluid pressures and temperature.