The Heat & Glo Energy Pro Gas Fireplace achieves 92.6% efficiency and can be used as a central furnace. Its dual-walled 4” coaxial vent pipe allows the furnace to distribute heat to more places in the home, and can achieve up to a 60’ horizontal run while connecting directly to existing HVAC systems. The fireplace is available with three front options and a variety of mantle designs and stone surrounds. heatnglo.com