Environ II Radiant Floor Heating for Carpet and Laminate Voltage: 120, Size: 12 sq. ft. Roll (2' x 6') Installs directly in between the pad and carpet or floating wood floor to heat the floor. Dimensions: 24"W x 72"L Circuit check installation aid available to ensure fault free installation Step-by-step installation guide, instructional DVD and warranty registration included UL Listed.