I looked at a TARM years ago, very well made units. That price is a steal too. They are made in Europe and have support in TARM USA which is in New Hampshire or Vermont, I forget which. Their wood boilers are super efficient, a downdraft design as they burn the gases too, almost no creosote from them at all. If it burns both, you are golden. Tarm also has considerable experience with heat storage systems, let us know any details if you contact them.