The Grohtherm 2000 shower water thermostat from Grohe features an outer surface that never exceeds the temperature of the water. A cooling channel and special couplings where the hot water enters the thermostat creates a barrier between the hot water and chrome surface to prevent scalding. The thermostatic valve senses and controls the water temperature, while a pressure-balance valve senses and controls the ratio of hot water to cold water. 800/444-7643; www.groheamerica.com.