11 degrees last night here in MI. I used the 4 ft left over section of my liner and my stove connector to make a short chimney. I put the bullet heater up to the firebox to warm the liner to get a little better draw. Burned great...took a little to get going. Glad i burned it in outside the paint fumes were pretty noticiable. Had thought bout getting the marshmellows out but a little cold out.