Burnt my first few pieces of shagbark hickory in my King last night,for about an hour the house had a smokehouse smell. Now it wasn't overpowering but I've never detected a wood smell with this unit burning any other wood species.Has anyone experienced this.PS 3 hickory splits are still heating the house 13.5 hours later,be mindful of the fact they weighed at least 10 lbs apiece.