Electrothermal film heating costs is electric charge. the power of a square meter is generally about 110W-130W. No matter what temperature you want to set, as long as it is working, the cost is 130W/N hours/square meter. A kilowatt hour, you can calculate on your own. National standard energy-saving is 65%, the heating watt per square meter is 50 to 70 W, 110 to 130W is the standard before 2005.