Northern Maine wrote:
Wondering if the unit you mentioned can be power vented like my current oil boiler?
Most people will use a power vent for the oil burner as a backup heat source and run their coal appliance directly into the chimney.
Now since you call yourself Northern Maine, how stable is your electric service up where you are ??
Any "stoker Boiler" will need constant electricity to power the under grate fan to keep the coal burning. In a power failure, most stokers go out within 15 minutes. However the larger coal boilers usually have a larger bed of coal burning and at idle use the natural draft of a chimney to keep the coal burning. Our AA 260 will go at least 24 hours without electric before starting to die down. Of course without electric, you will not be running circulator pumps either.
As was mentioned, you really need to do that heat loss calculation.....................