5.1A Floor Warming Cable Kit 5.1A. Warm Tiles electric floor warming cables deliver affordable comfort and luxury. Easily installed on subfloor or concrete slab, in thin-set or self-leveling compound materials. Use under ceramic, slate, stone, engineered wood, or laminate floor coverings. Designed to supply at least 12W watt per sq ft square foot when installed properly. 120V volt . UL listed Underwriters' Laboratories to USA and Canadian Safety Standards. This kit covers up to 54 sq ft for a floor above a heated space or basement. Above an unheated space or on slab construction, the kit covers up to 39 sq ft. Non-programmable thermostat and programmable thermostat stocked/sold separately. Square Feet 39 sq ft, Pkg Qty 1, Package Type Box