Heating:

Radiant floor heating is a method of heating a home, shop, or other building with the heat concentrated in the floor. It works by embedding special tubing in a concrete foundation or in a thin concrete mixture on top of a wood-framed floor. Heated water (or a food-grade antifreeze mixture) flows through this tubing, warming the thermal mass of the concrete.
Conventional forced-air systems, wood stoves, or other heating methods produce uneven heat, with the highest air temperatures near the ceilings. Hydronic heating puts the heat in the floor under your feet, gently warming a room or a complete structure. This results in similar heating levels with superior comfort without wasting energy and money in monthly fuel bills. The warm water circulated through the tubing in a radiant floor may come from solar collectors, water heaters, demand water heaters, wood stoves, or heat pumps.