The performance of this unit & the reports that have come out this winter have really grabbed my attention. The topic of operating this unit in cold weather without the use of the blower has especially interested me. Speaking of the blower, where is the blower located on this unit. Another question while I'm thinking about the maintenance at season end, while cleaning the chimney does all of the debris fall into the fire box if the bypass is open. If not what surprises await the user in clean-up afterward.