My Harmon P68 Was so load it drove my wife crazy. It was running around 63 db. When I had a fuel delivery issue I replaced the Auger motor and it got about 1db quitter. I quickly learned that the combustion fan motor was the source of the majority of the noise. I saw and article about the bearings not being very good and would go bad. I found a new AM fan motor on Amazon Harman 3-21-08639 Combustion Blower Exhaust Fan Motor Upgrade Fits Pellet Stoves P43 P61 P68 XXV Accentra 52I Advance P35I PC45 PF100 PF120 BA100 BH105 Replaces Part 3-21-08415 for $70. It came with a fan for the combustion side but was not as robust as the stock so I cleaned the stock and reused it. When I fired the stove back up I was scared my stove wasn't working right because I could barely hear the combustion fan. The stove came up to temp and has been running now for a few days with no issues. The sound is now at 46db. I am beyond happy and my wife is tickled pink.