Hawken Energy Products Outdoor Wood Boiler: GX10 Model. This boiler was manufactured after the new emissions standards, meaning it is more efficient than the older models. We do have a HE-1000 (pre-emissions) in stock as well. The item “NOS Hawken GX10 Outdoor Wood Boiler Stove Michigan” is in sale since Sunday, May 28, 2017. This item is in the category “Home & Garden\Home Improvement\Heating, Cooling & Air\Furnaces & Heating Systems”. The seller is “electricdealsforyou” and is located in Eckerman, Michigan. This item can be shipped to United States.