I live in Michigan in an old farmhouse with somewhat poor insulation. It is about 3500 square feet. I am not interested in an outdoor boiler. I cannot get wood for free. I am looking hard at the PB 105 pellet boiler to use for hydronic coils added to the plenum in my main furnace and in a smaller attic unit. I would like to use for DHW as well. Does this seem feasible and likely my best option. Pros and cons would be appreciated. If there is a better boiler out there I would be interested in researching that as well. Thanks.