I have a New Yorker Residential furnance that is hot water circulated through radiators. I would like to addon a wood/coal combination to this existing system. Here are some specifics: Boiler model AP-590 DOE heat capacity 107,000BTU Net output 93,000BTU The unit also has a domestic hot water jacket. Any help you could provide would be greatly appreciated. The unit is now set up to burn fuel oil. Thank you.