First off I just purchased the Englander 25pdvc from Home Depot. 1. How long should a hopper of pellets last? I have the unit set burn rate 1 and blower at 5. It seems like I'm lucky if I get 12 hours out of 40# of pellets. 2. Is there a optimal setting or is it just individual preference's? IE, you get better heat with a setting of 2 and 6, or something along those lines. 3. Is it harmful to run a mix of corn and pellets in the 25pdvc? I did some searching here last night and found that Mike doesn't recommend it, and the book says it will void the warranty. But I cant find anything that says it will damage it. 4. On the same note of warranty, if I were to run a mixture of corn and something happens is the entire warranty void or just parts of it. I found a post on here where someone said, I believe it was a Harmon stove that they would only void the warranty on the burn pot. I think thats it for now. Thank you for your help. I wish I would have found this site sooner. Other than it seems like it is burning a lot of pellets I really like the stove and if it saves me a bit of gas this winter then its all worth it. Mike From Northern Michigan.