InfloorBoard is a dense composite board covered with aluminum. The boards have precut grooves in which 3/8-inch tubing is placed. Hot water runs through the tube warming the aluminum that spreads the heat evenly and quickly. InfloorBoard is controlled with any thermostat and accepts any type of floor covering. For more information on InfloorBoard or any other Infloor products, please call 800/588-4470 or visit www.infloor.com.