MARCH JLC 1997 Products by David Frane Low-Profile Radiant Heat Radiant floor heat is rapidly gaining popularity. Unfortunately, most installations significantly increase the thickness of the floor finish or require access to the joist bays below. Warm Touch TF2000S low-temperature electric heating mats are 1/8 inch thick and fit in the thinset mortar bed holding tile to the floor. The system adds between 1/4 inch and 1/2 inch to the floor thickness. While Warm Touch is capable of providing all the heat in small, well-insulated rooms, it's more often used to supplement existing heat systems by warming particular sections of floor. The manufacturer says 30 square feet of mat (enough for the average bathroom) running for two to three