I know there has been a lot posted regarding outside air kits and it seems to me that it makes perfect sense to use non heated air for combustion BUT the guys that installed and service the stove said they don't recommend them. They said they really don't make that much difference. I've got a Mount Vernon AE heating a 3000 sqft house with 12 - 14' ceilings. The stove runs flat out night and day. I burn Hamers exclusively (5+ tons). 5 tons in the garage since late August. Any thoughts? Thank you.