I have a large Enviro Maxx stove, 60,000 btu blowing 455 cfm and can take 3x 40Ib bags. This beast has always been noisy and the guy who does the twice yearly cleanings says they are all bad, perhaps the larger ones the worst. It is mainly the auger sound with it's grating on/off cycle. The fan itself is ok, a constant white noise that I can live with. During cleaning, the gearbox is greased and everything that might be contributing to noise nevels is inspected for any ash build up. I would be interested if anyone has a larger stove like this where the noise level is less intrusive--with the auger being the main culprit, are there any alt designs for distrubuting pellets in a less primitive way?