New to the forum. I hope someone can help me. I'll lay out my situation with as many details as I can. Small, single story house. Wood/oil combo furnace in basement. Outside chimney on west end of house (wind almost always from west). Chimney only a foot or so from roof. Trees close to house at west end. Basement door and window almost always open to outside air. Unless the fire is raging and the weather is clear, I'm always getting smoke in the house. It comes out the loading door when I load, (usually) and comes out the chimney and crawls around the house, looking for a way in. I even smell smoke coming out of the registers sometimes (I assume it gets in the house and is being recycled by the cold air ducts. I'm going to try a chimney extender but I'm not convinced that is all my problem. I think I must have negative pressure in the house, but my basement is usually open except in the coldest weather. I probably have inadequate cold air return but I don't know if I can fix that. Any advice is appreciated.