I recently bought a house in central VA that has two fireplaces. One in the main level living room and one in the basement. The fireplace located on the main level has doors and I do not intend to use it. The fireplace in the basement has a steel plate covering the front of it with a hole nearly centered. I am considering buying a small wood stove and venting through the existing hole. Finally to my main question/concern. Do I need to run pipe all the way up the existing chimney and out, or just up past the flu?