McGiever wrote:Yes, some are higher, some are not. There are a lot of variables depending on the source of any coal.
Lightning wrote:It would depend on what form its in size wise. Nut rice or stove size. I would think the ant coal has a higher density.
Paulie wrote:Studying for my engineers license, and was surprised to learn that soft coal actually had a higher btu value than hard? Who knew?
Lightning wrote:I would think they would be so close in volume that if you are sizing a bin to build, it wouldn't matter. Coal size would be a more important factor since a ton of rice would take up less volume than a ton of stove size.