Can someone help or advise me ,a boring subject but nontheless I"m curious.My installer while doing a great job, to me skimped on my chimney cap. It looks too small for this unit. Is there a cap any seasoned BKBURNERS,or BURNERS could recommend it's more on an aesthetic thing at this point than functional.I would like something that looks and functions well if there is such an animal. Is it true that a larger cap draws better,what about air cooled VS non air cooled need direction in this matter you guys steered me right on the stove,the MM,the IR please help me find a cap.