For proper operation and efficient fuel consumption of wood and/or coal-fired furnaces, the draft must remain constant. When it is, combustion is more complete, fuels are utilized more efficiently and money is saved. US Stove DR6 Barometric Draft Regulator maintains consistent draft by counteracting the negative forces caused by changes in temperature, barometric pressure, and the effects of wind. US Stove has been bringing warmth to homes across the nation for 140-year. US Stove has a wide range of Automatic Circulators, Plate Steel Heaters, Cast Iron Heaters, Pellet/Multi-Fuel Heaters and Gas Fireplaces from which to choose. The large selection of stoves and accessories will ensure warmth of your home with safe, quality products.