Freddy wrote:[quote="63roundbadge"]More ash=less coal actually burned and less BTUs produced.
I don't know if that's a fact or not. The deep mined coal I am burning (Superior brand from 2008) I was told (and the price reflected it) was the highest BTU per pound of any anthracite coal mined that year, yet, I make far more ash than my buddy that's burning Kimmel. I jokingly say it's the same size and weight coming out as going in!
That's what I was wondering about too. When I buy coal, I don't think I necessarily care about the amount of ash in it but instead care about the number of BTUs. It seems to me that the only reason I might care about the % ash is that it determines how frequently I have to empty the ash pan. Since my ash pan is large, I generally only have to empty it once a week. It doesn't matter to me if it's 10% or 30% because I still have to empty it once a week.
Am I wrong?[/quote]
Most of the time the ash% are pretty close to each other 7-10 percent. You empty your ash once a week with 10% ash. If it was 30% ash, you would be emptying your pan 3 times as much you would think. The tricky part is sometimes the ash is light and fluffy so the volume of ash is large. Sometimes it has a lot of unburned coal/shale in it so its really heavy by volume. For instance; I burned coal from Hudson several years ago. Burned real nice, a lot of heat. Had to empty the ash pan every day and a half. Burned Harmony several years ago. Burned real nice, a lot of heat. But,,,, I emptied the ash pan every 3-4 days. I burned Jeddo last year. Burned nice., a lot of heat. Emptied the ash pan every 3-4 days. The difference between all three; They all heated extremely well. The Hudson I could take the ash pans out with one hand because they were so light. All the time. The harmony had all ash with no unburned and the pans were solid. The Jeddo burned as well as the other two. Had the same amount of ash by volume as the Harmony but the pans weighed much more than the others. They would be trouble if I was older.