Wow. Just wow. Is the installation of a pellet stove that much different? Fire, air intake needed, smoke has to go somewhere, and heat. I don't know if the requirements are different, so maybe someone can chime in here?
Pellet stove does not require a chimney or much in the way of insulation. I have one and it has a straight exhaust pipe that goes through the wall to the outside only a few feet above ground level.