Hi All, I just moved into a "new" home that has one of these beasts with no instructions. I've been burning oil all winter because I don't know how to operate the other options. Can anyone get me up to speed quickly so I can burn some wood or coal? I don't even know which door is for which fuel. I don't see a model number unless it's under the hood. There are three doors, two on the far right, one on top and one below and another door somewhat in the center. There is also a chain connected to a vent flap beneath the lower chamber. I see some grates in the garage that look like they belong with the furnace too. Please help. Thanks.