Floor Heating Systems for Indoor Concrete Slab Perfect for basements & garages Heats beneath concrete slab floors Available in Cable or Mat form and in 120v or 240v Indoor Slab Heating Systems are perfect for heating those large, concrete rooms, such as garages and basements, that are almost uninhabitable during the winter months. At 20 watts per sq ft and available in cable and mat form, they offer versatility when planning and glowing radiant heat once installed. Indoor Slab Heating Systems ship with a 10-year warrant