In some floor heating applications, an electrical system may not be an option. The most common reason for this would be that there is not enough power available to heat the entire room.
In these cases, a radiant system that runs on hot water is the best solution. For these applications, Easy Warm Floor manufactures tha A-Mat.
A boiler located in another part of a house heats a water supply which then runs through tubes which are installed underneath your floor. Much like a hot water radiator, the heat from these tubes warms your floor and radiates throughout the entire room.