I installed a pellet insert this summer and have been using it some in the cooler weather . Seems to work good , This unit holds 50 lbs of pellets . Im wondering what the btu's are per bag pellets . I bought 2 - 2 ton skids , ( 50 -40 lb bags ) So I was tring to figure our if a 40 lb bag last 8 hours what would the btu's per bag ? I paid 225 a skid . Thats about 6 dollars a bag . Seems like alittle over a dollar an hour burn rate . I know free wood is the best value but comparing this to natural gas how does this rate ? Thanks