Outdoor Wood-Burning Furnace. Eliminate your heating bill with an outdoor wood burning furnace, otherwise known as an outdoor wood stove or outdoor wood boiler. An outdoor wood furnace can hook up to almost any existing heating system. You can also heat your domestic hot water with an outside wood furnace. Get yours from Pineview Woodstoves in Almena, Wisconsin. Outdoor Wood Furnaces. Burn Wood, Not Money 💰!