The story goes like this. A friend of my father built a large home for his family with a large open fireplace. The only problem was that it smoked up the house because it had very little draft to draw the smoke up the chimney.
A man who was a master builder and who specialized in building chimneys was called upon for help. He saw the problem clearly, and he said, "I can fix this problem." So, he began to tear it apart and rebuilt it.
The logs were placed on the fire logs and the fire was ignited with pine kindling. The logs were soon ablaze, and the smoke went upward into the tall chimney.
"The draft was so strong," said my dad, "that it caused the key hole in the door of the room to whistle two-part harmony."