I found a deal on coal through someone I know but it raises some questions. I was told that If I removed the coal from this persons basement I could have it for $100. I jumped at it because a deal is a deal and cheap heat is good. The only information I had was that the coal was loose and that the guy didn't want it and needed it removed. I under estimated things and as it turns out I think I got between 3 and 4 tons of nut coal for $100. I was talking with the guy the other day as I was removing the last of it and I found out that the coal had been in their basement since before 1972 as this is when they moved in and it has been there since. They never used their coal boiler because it didn't work properly and they couldn't find anyone that could make it work. So, of course their loss is my gain. But now it raises a big question. Does anything happen to coal that has been sitting for so long? Is their anything that I should be aware of like it might burn funny from absorbing moisture or anything like that? I don't know if it makes a difference but the boiler I have is a Tarm OT-50 and it runs on natural draft. I only burned coal in it last year for about a month and I was very pleased with it. But, that coal was freshly mined, bagged coal. Does anyone have any useful info that might help?