EFM 520 in a rancher

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!!

Yes Yes and Yes You will Pay for the cost of a New EFM stoker in about 3 seasons with the current oil Price The 520 will
be Just fine for your House The Problem Now is you will have to wait on a New Unit all of the stoker co. Have lead Time
for several Months Have you thought about A Refrub EFM you will save 50% to 60% buying a Refurb one If you are interested in one PM me I will give you more info And you would not a DF unit with a oil gun being you already have a oil burner you will save even more money

The recommended flue size is 8 x 8. Be sure it has good draft.