Electric Floor Heating for Flexible Layouts SunTouch® WarmWire Cable is a resistance heating cable system for electric floor heating installations. The loose cable design allows spacing to be adjusted around room layouts and is installed over plywood, backerboard, or concrete slab according to applicable ANSI or TCNA guidelines. Installation in Thinset or Self-Leveling Mortar WarmWire is embedded in a minimum 3/8" layer of self-leveling or polymer-modified thinset mortar. It can be installed over backerboard or suitable setting beds on wood subfloors and concrete slabs, including thin slab and self-leveling concrete installations. Adjustable Cable Spacing and Heat Output The heating cable can be spaced at 2.5", 3", or 3.5" on center to provide different heat outputs. At 3" spacing, WarmWire produces 12 W/sq. ft.; 2.5" spacing provides 14.4 W/sq. ft.; and 3.5" spacing provides 10.3 W/sq. ft. Tile, Stone, Carpet and Hardwood Floors WarmWire can be used beneath tile, stone, carpet, and hardwood flooring when installed according to system requirements. The cable is also approved for installation in shower applications, extending electric floor heating into properly constructed shower areas. 120V and 240V Heating Cable Options WarmWire is available in 120V and 240V configurations with multiple cable lengths and coverage areas. The system supports circuits up to 20 amps, or up to 15 amps when used with a SunStat control, allowing the appropriate cable to be selected for the heated floor area and electrical system.
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