I can probably guess the correct answer, but we recently bought a new pellet stove (insert) and 4" flue kit and had it professionally installed. Had all kinds of issues with the pellet stove, so took it back and bought a new wood stove (insert). The wood stove has a 6" exhaust opening... any way I can utilize the 4" pellet flue system by using a reducer to connect the 2? Probably not, but I'm just looking to save some money at this point. Thanks for any guidance.