I bought a used a Crossfire fireplace insert last year to burn corn instead using my coal burning insert. I burnt corn last year and didn't much heat out of it. This year, I'm using wood pellets, and still don't much heat out of it. I'm burning about 100+ lbs wood pellets a day. Last year used about 120 lbs shelled corn a day. About the same . Don't feel much unless I stand close to it. The fuel furnace runs as much with the pellet stove on as without. I have a big old farmhouse, but have new windows and insulation. The coal insert put out enough heat to heat it, but since I'm farming and have corn, I switched. I don't have dry corn yet, so got a skid of wood pellets to start. I have the exhaust venting in the chimney with 2 feet of 4" pipe extending to flue. Wonder if there is a higher output switch to make it blow more air our of heat exchanger? Or if anyone has suggestions how to get more heat out of it.