The Tradesman 400 Ultra Portable Forced Air Heater offers the best value in economical construction heating, built to professional grade standards in North America. Engineered to deliver high heat output with the ability to move large volumes of air, plus solid state electronic ignition for sure starts, thermostatic controls and built-in safety features. Featuring heavy duty construction, and the exclusive tr-shield finish, the Tradesman 400 is built to handle years of rough and heavy operation and is certified to meet or exceed CSA-Canadian standards. The ultra model uses the service saver technology to allow self-diagnostic trouble shooting to aid if a problem ever occurs. Recognized as a leader in construction heating for more than half a century, L.B. White offers the technical expertise and knowledgeable customer support you can count on for all your construction heating needs.