Question: how much electricity does radiant floor heat use?
Answer: Electric Radiant Floor Heating Cost to Operate A typical electric floor heating element produces 15 watts per square foot. When installed in a small 35 square foot bathroom running a total of 8 hours a day, the system would only use 4.2 kWh per day or 128.1 kWh per month. The national average kWh rate is $0.12.