Underfloor heating is a method of heating a building in which the heat is distributed through the floor. Electric underfloor heating systems also exist, which use electric cables or mats placed underneath the flooring. The warmth is radiated upwards, heating the room from the floor up, heating the whole room at a lower and even temperature . Underfloor heating can be used in both new construction and retrofitted into existing buildings. It is popular in bathrooms and kitchens but can be used in any room in the house.