Electric radiant heating systems are very cost-effective solutions for smaller spaces (1-5 rooms) because they are easy to install and have a very low start-up cost. An electric thermostat is all that is required and costs only about $100-$200. Another advantage of electric radiant floor heating over a warm-water system is the floor build up or height. Floor build up can be from as little as 2mm. The electric cables are usually installed onto an insulation board or directly onto the subfloor or padding (under carpet or laminate), then the floor covering is placed directly over the heating system or thinset.