Norseman 2500 wood or coal burning furnace. Has two 550 cfm fans that are thermostat controlled based on air box temperature. It can be ducted into an existing HVAC system or used standalone. I used it in my 30x60 shop with just two 90s directing the air flow. It is rated at 115,000 BTUs and capable of heating up to 2500 square feet. I do have some stove pipe and other accessories that go with it. It's sitting on a wheeled cart that also goes with it. My only reason for getting rid of it is I switched to natural gas furnace.