Hey Iowa, If you can stand another recommendation we manufacture the Caddy EPA line of wood furnace.
3,000 Sq Ft is quite a large house. Make sure any furnace you buy has the blower able to handle it and your duct system is balanced properly. As you know wood does not burn like oil or gas at peak BTU all the time.
The Max Caddy
http://www.psg-distribution.com/product.aspx?CategoId=26&Id=563&Page=description can handle 3,000 sq ft and like the Kuuma does not have any smoke or creosote issues since it re-burns the smoke.
Some of the benefits are about 140,000 Max output BTU (on high Fire) or a better way to figure it out about 90,000 average BTU over the life of the fire. Customers have claimed fires up to 18 hours but typically you are looking into the 8Hrs to 12Hrs range depending on your house BTU load. BTW, what do you heat with now and what is the BTU rating of your current furnace?
The blower is a multi speed self adjusting blower that tries to keep the temperature in the plenum constant. That's why we can claim efficiencies of 82% for such a large furnace. The self adjusting blower ensures the fire box doesn't cool too fast on start-up and end-of-fire thus ensuring no smoke condensation (creosote) will occur.
As options, you can add an oil burner, electric elements or both! You can also bring your cold air return on the right, left or top. Good if you're in a tight installation. There is also an optional hot water loop to pre-heat your domestic water. It is also AC ready and has an entire electronic board to control all those features.
This is a favorite with the Amish folks in the Mid-West.
If you want a rough estimate of cost PM me and i'll find a good dealer in your area.