I have a large traditional fireplace in a 15x12x8ft. room with two open 36" doorways. House is 3200sq. Ft. Contractor recommends Osburn 3500. Seems fine, but overkill for the size room it will be in. I told the contractor that I am afraid that such a big insert (110,000 BTU) would overheat the room. Even with the central furnace circulating fan on I doubt I can distribute that amount of heat in a reasonable manner. Salesman response: build smaller fires. I thought maybe a Matrix 2400 or Inspire 2000 would be more suitable in the Osburn line. Your thoughts would be appreciated.