The Harman DVC-500 Direct Vent Coal Stoker is incredibly smart and efficient. It comes standard with a computer on board which makes constant adjustments to the fuel consumed and to the heat driven into the room through the blower. You can’t get a more airtight coal stove than the DVC-500. The exhaust motor returns used air to the outside the same way, ensuring that your home stays clean and safe. In addition, there is a powerful blower dedicated solely for distributing heat through the stove and into your home.