Jon If I were to add forced air intake I would duct it in from outside the house additionally I would want to add thermostatic control this would lead to wanting to convert it to chip, cubes or pellet fed with automatic ash disposal Add in auto ignition and a couple of silent 10" muffin fans above the hallway and registers above the doors to the rooms and I would have a complete central heat wood furnace. It already keeps most of the house more comfortable than my heat pump with the emergency element furnace. But who knows where that wild hair may land next year.