I know there are alot of formulas out they tell you via BTU how many tons I need. But I would like to get some input from you guys who are experinced with the use of pellet stoves. I am having my MT Vernon AE installed at the beginning of september. I have 4 tons of pellets (2 here + 2 being delivered with installation). I was originally going to get 3 tons but went with 4 just to be safe. I am going to heat 2500 sqft with the stove. I'm hoping to keep the temp @ 72 degrees in the room the stove is in and 68 degrees upstairs. I will drop the tempurature on the stove 10 hours a day to 60 degrees. Do you think I have enough? Thanks in advance for all your help. Sorry I should have been alittle more thorough with the backgroud of my house. It is approximately 5 years old. I usually use 800 gallons to heat 3 zones of heat (3300 sqft including 800sqft finished basement). I will only be heating 2500 sqft with the pellet stove and using space heaters anytime anyone is down stairs (hopefully the solar panels I’m having installed will pay for the electric use). The house is pretty tight and is not draftly at all.