I'm running my stove on 1 and the room blower on 9 the 3 button on bottom are set at 3,4,1....I know the factory setting is 641....I'm using a bag of pellets in ten hours and it's on the lowest setting. Any ideas to make pellets last longer....my house is 1500 sq ft and it's -3 out and on lowest setting it keeps my house at 73.