I also bought the 17 inch brush- see review. I wasn't sure that it would be long enough, so I bought the 27 inch one. I now realize that the 27 will probably help clean the transverse exhaust passage behind the firepot, with the exhaust blower removed for access, but I haven't tried that yet. It is hard to clean from above using a micro cleaning adapter on the vacuum cleaner, as recommended by the pellet stove manufacturer (Quadra-fire).
Reviewer: John Grode
Excellent tool for cleaning Corn/Pellet stove, gets into those hard to reach places. A must have for anyone with a Cornstove!!
Reviewer: David Tarantino
Does the job it is intended for. I have two 90 degree elbows from my insert to my stainless liner, and this brush lets me finish the cleaning job with relative ease.