The Norseman™ XTB Explosion-Proof Thermostat is designed for remote sensing and control applications in hazardous locations where explosive substances may be present, such as air, ducts, pipes or tanks. The XTB-04 model for space heating applications has a temperature range of -18°C to 40°C (0°F to 100°F). All thermostats in the XT series use the patented x-Max® terminal housing with the unique track and trolley wiring to provide maximum durability, safety, convenience and ease of use.