We just purchased a used Napoleon free standing pellet stove ( 3months old) and no matter what we do we just don't seem to be able to get it to burn hot. We have installed outside air, changed pellet brands, played with the air intake etc....... The air coming out of the stove is lukewarm most of the time. If we turn the pellets all the way up we get build -up in the burn chamber. Even if the stove is running well when we go to bed, we wake up to a lazy flame and unburned pellets in the pot, this is with premium pellets. The unit has a rod on the side for controlling air intake and we have tried every setting there is. We have many friends with pellets and all of theirs run hotter than our. We are also having to clean the inside of the stove every 2 days due to build up of ash. Does anyone have any ideas? We contacted Napoleon and they were no help.