My 20 plus years old VC Dutchwest XL needs 700 dollar’s worth of parts and rebuilt. Sat in a open lofted 2200 square foot house with basement. 18 ft of 8 inch black pipe to ceiling box and6 feet of stainless on roof seems to be in good shape. With tax incentives out there probably should replace .What are the thoughts out there on what would be good options. Thought about BK King or Green mtn 80 if my chimney was still good since they have 8 inch flues.