I am a chimney sweep with a question i cant find a legal answer to. I am doing a chimney inspection for a customer who has sold there home and i am peeing in the water. On inspection i found a free standing stove in a basement connected to a masonry flue. On the main floor i found a factory built fireplace also conncected to the same flue. it is a empress 722. My questions is an Empress 722 meant to be tied to a masonry flue or is it air cooled also can you have both in one chimney