Finally a solution to cold tile floors! SunTouch electric floor warming mat kits are made in the USA and make adding comfortable even warmth to any floor easier than ever. SunTouch is the Simple, Safe and Efficient way to warm floors to a comfortable temperature and even warm up your room too. Luxurious warm floors using SunTouch mats for easy installation are a Do It Yourselfer's dream. SunTouch is precision manufactured by Watts Radiant the World Leader in floor heating technology for comfort, safety and long life durability. We include all the items you need except basic hand tools and the electrical box. Mats install in 1 STEP with the thinset mortar, right under the tile. An electrician is recommended for connection to power. Why choose SunTouch over other floor warming systems? SunTouch mats invented the safety of twin wire technology and many patented innovations. Superior wire construction, 25 year warranty backed by Watts for 135 years, and more sizes of TRUE radiant heated floors than anyone. Plus the controls, software, code listings and in house design and expert engineering to make your heating project a success. SunTouch has Safety built in using a UNIQUE shielded 2 wire design for ZERO electromagnetic fields, dual copper insulated wires and a true ground wire for connection to the SunStat Thermostat. Which Size Mat kit? Grab a tape measure, consider all areas you want warm and plan to heat most of the open floor, subtract 4 to 6 inches along walls, subtract built ins, vents, obstructions, etc. Heat within 1 inch of cabinet toe kicks and 6 inches from Toilet drain hole. How do I install? Start near Thermostat, Roll out mat, turn as needed and fasten to the sub floor with 2 sided tape, staples, or hot glue. Place the Thermostat temperature sensor wire between any 2 heating wires, run the sensor wire and mat power lead up to the electrical box. Then spread mortar over mat and install your tile. Finally, have a Pro connect and Mount thermostat to box.