Anyone have an experience or heard info on the Aqua therms? I am finally ready to buy an OWB and there seems to be a lot of Aqua therms in my area. Live in Central NH. Have a standard forced hot water (oil) furnace in basement so the closed loop, pressurized Aqua therms seems to make sense. They do have the new Eco-one units that are supposed to have the secondary burn chamber. Any idea if it really works & will cut the wood demand down (possibly in half?) like many of the threads I have read here. The Eco-One is listed at $9K vs. the standard model at $8K for the mid sized units. Thanks.