Debbie, here is a link to your boiler http://marathonheaterco.com
Their main office is in Richford, NY. The unit you are looking at is probably the"ABO24C . It is a combination wood/coal boiler, which ain't a bad thing. Trust me the day will come when the wood is gonna win!!! I have a similar type unit Harman which also is capable of burning both; although I primarily use coal. In upper right of main page go to google there are posts about this unit there Good luck. Jim
Edit: just checked their website and they do offer a wood only boiler. However still nice to have options.