ive had the stove for a year now with no problems, so far this year ive used the stove 10 times, my house is 1500 sq ft, and the stove is in a finished basement, i usually burn the stove at 1 and fan at 4 the down stairs heats up to 88-90 degrees the middle floor around 70 and the upstairs is usually 74. My question is i fill the hopper around 10pm and by 630 am there is very little left in the hopper that seems to be burning very quickly is it not? and suggestions first off?....my second question is i am starting to hear like a ping every once in awhile and it seems that the pellets for a short amount of time stop falling into the burn pot and the flame seems to go out then magically more pellets begin to fall and the flame continues, any ideas?...Thanks for the help in advance