Safety is a major consideration when it comes to burning wood as a heat source. An estimated 73,800 home heating fires in 1994 killed 487 people and injured almost 2,000 people. But Central Boiler outdoor furnaces remove the fire hazard from the home or building being heated -- all burning takes place remotely, up to 500 feet away. There’s no indoor burning, indoor smoke, and no threat of a devastating chimney fire. Also, indoor burning can affect air quality, and even create a dangerous buildup of carbon monoxide. With a Central Boiler outdoor furnace, these problems are eliminated. You get clean, comfortable warmth -- and peace of mind. All Central Boiler outdoor furnace models have been tested and listed to UL and CSA standards.