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Flue extending beyond crown on a chimney
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DerbyDad03[_2_]
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Flue extending beyond crown on a chimney
wrote:
On Sep 13, 1:07 pm, DerbyDad03 wrote:
Sheldon wrote:
Why are so many chimneys built with the flue(so) that extend above the
crown?
For Looks?
To improve the chimney draw? I would think the small increase in height
would make little or no difference
To allow the chimney to meet code? I would think the chimney could just
have been built at the correct height in the first place.
Sheldon
AFAIK
, the code requirement in most areas is that the flue must extend
at least 2" above the crown. YMMV
Picture wind gliding across a sloped crown with no flue extension. You
can almost imagine the wind sort of sealing the flue opening.
Now picture wind gliding across a sloped crown and hitting the wall of a
2" extension. The wind is forced upward instead of flowing across the
opening.- Hide quoted text -
- Show quoted text -
extension helps screw chimney cap on......... try to do it with "
flush flue"
But is that why it's code?
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