ChubbyCoalBoy, what was your experience with the Jotul 507? How does the heat output, surface temp, and burn rate compare between the chubby and the Jotul? I just got a Jotul 507 and had our first really cold morning this morning. The Jotul is downstairs, floor vents and small fan in vent blowing air up into living area. The Jotul was chugging along at 500 degrees (measuring middle loading door) on damper setting of 2 1/2, but upstairs was only 66 degrees. How hot did you run yours, and on what bottom damper setting? I'm afraid to push it above 500ish, should I let it rip higher? I'm wondering if the Jotul doesn't have the power to heat 1800 sq foot raised ranch, even with the floor vents and fan. I'd love to hear your experience.