USAF, 220K will EASILY heat 2400 sq ft.....idling. That output level will do up to 5000 sq ft, perhaps more under the right conditions. Please post your location....especially since you say you are a lurker. Step out of the shadows, join the rest of us. This outdoor style unit will appeal to many folks who think coal will get all over their homes, and be a black mess.
Remember, you can install most any boiler remotely anyway, but if you MUST have a separate unit, this is the ticket.
All you need to do is think outside the box, and the light will blind you. An ash auger is a special treat for many folks....kinda like power windows vs no power windows.