For sale, brand new unopened ThermaWire Thin Floor Warming Mat 240V 1470W. Retails for $980. These floor heating mats are made from 4mm or 3/16 inch diameter twin conductor heating cable. 12 W/SF. 18 inches wide x 81.0 feet long, coverage 121.5 SF, heater area 135.0 SF. This is the last one that I have left.