HeatTech 95-190 sqft Electric Radiant In-Floor Heating Cable System, 240V Area Coverage: 95 sqft @ 2" spacing; 140 sqft @ 3" spacing (recommended), 190 sqft @ 4" spacing. Heating Cable Length: 560ft + cold lead (10ft) Voltage: 240V; Output: 1680W (3W/ft.); Amperage: 7 Amps Heating cable is only ~1/8" thick and will not raise the floors significantly. UL listed for USA and comes with a 25-year Manufacturer Warranty