As a new member of this fourum I am asking for assistance in determining if an EFM 520 boiler would be a good investment for us to make to heat our 2250 square foot rancher. Some info - chimney height - 20 feet, flue size 7" x 7", coal bin size - four tons. (In the 1980's we heated our home and hot water with a New Yorker Wood/Coal Boiler. We reverted to using our Dynatherm when the price of oil dropped and sold the boiler to a friend.) Having grown up in a a home heated with coal (anthratube) and heated our home with coal in the 1980's we would like to return to coal heat but in a more automated manner. We would appreciate any advice and recommendations efm owners using them in ranchers might have for us as well as advice from any other forum members. Thanks!!