Quadrafire 7100 and Northstar owners, what kind of burn times and sq ft do you have ?

7100-1800 sq ft-6 to 10 hrs depending on outside temps-only heat-got elec. heat just havent turned it on in 20 years

Quad 7100 I heat 2700 sqft. Burn times are very subjective here is my definition, I damp it down so that I can't see smoke from the chimney and the glass doesn't go black. If I pack it full of hardwood at 11pm I can come down at 7am and have hot red coals and can throw a few splits on and they will take off again. So my definition for real world heat producing burn time is 8-9 hours.