..............not mine but my neighbors 25 PDV . The larger 2000 sq ft model. The recommended factory settings on the bottom 3 touch pads were 6-4-1 but holy moly, he was going thru a lot of pellets and the heat was way too much for this time of year so we made some adjustments. We been running just fine for many days now at 1-4-1 with a nice clean yellow/orange dancing flame and plenty of heat in this not so cold weather . The window mostly stays pretty clean for 12-18 hrs before it starts getting brown on the right hand side and progressinly getting worse but it wipes right off and seems normal to me. Actually we`d like to get it down a bit more and maybe by closing the slide plate in the hopper a bit would help . Just wanted to let other Englander users know that you don`t have to be stuck at 6-4-1 if it`s too much heat. I think those buttons are there for a good reason.