I had 6 tons of pellets to start the heating season. I am heating about 95% with pellets. (Our house is 2000+ sq ft. with 10 ft ceilings in every room) I will complete burning my 4th ton on or about Feb 1st. At this rate I should run out around March 10th. Pretty Good, I think.... So far this winter I have used about 125 gallons of HHO...... All together (not counting buying the Thelin) it will cost just under $2,000.00 to heat my entire home (including hot water). Very Happy as last year heating costs were over $4,000.00...... Next year I think I will get 7 tons (actually this spring / summer). I Came, I Saw, I Pellet Pigged!