Its funny, the only stove that quad makes that was quite was the 1200, the other three were noisy, quad touts that there 1200 was the only stove to pass some test in switzerland, along with another swiss stove. Hooopla IMO. But one thing for shure, you cant hear the new stoves start up, you dont here any blowers kick on, i was floored by how silent these stoves run. If these stoves work, maybe i will warm back up to pellet stoves.