i have had my post 2004 25-pdv installed in my basement now since september. i have only used greene team pellets from lowes because my mom swears by them in her 25-pdvc. i run my stove ranging from 4-8 on the heat range and blower settings depending on the weather. i also do have an oak installed. i tried a couple of bags of fireside ultras that lowes was selling for the same price so i decided to try them. something i though was odd happened... one bag of firesides lasted almost 18 hours and the greene teams i can only seem to get about 12-14 out of the last 6 or so bags i have bought/used. and the outside temp here has been bout the same that last 10 days or so.... i also noticed a ton more clinkers from the greens than the firesides. they burned almost perfectly. my question is, does this stove burn based on internal temp or is it strictly based on external settings? i clean the front of my stove daily and vacuum behind the impingement plate every other. i'm not sure where my lower buttons are set but it sounds to me like after lurking around here for the last few months that i run my stove higher than those shoud matter. any insight would be helpful. thanks.