Contrary to popular belief, a traditional fireplace is not designed to be used as a primary source of heat. In fact, the Environmental Protection Agency says that most traditional open fireplaces lose over 90 percent of their heat through the chimney along with much of the heated air in the room. Certified EPA wood stoves and fireplace inserts, on the other hand, are very different. While older uncertified stoves and fireplaces release 15 grams to 30 grams of smoke per hour, highly efficient EPA-certified units produce only 2 grams to 7 grams of smoke per hour. The Alterra line from Regency adds a measure of Euro cool to this type of eco consciousness. Constructed from high-quality cast iron, the units ensure consistent and comforting heat throughout your living space and do so while meeting the strictest air quality standards. www.regency-fire.com.