Dear Ray and list members:
Another helpful feature that works well with fire places is an outside air
supply which feeds directly in to the fire. Both of my fire places have this
feature which is simply a pipe which connects to the exterior of the house and
comes in to the fire place in the bottom center. This allows the user to keep
a tight house while enjoying a roaring fire . The metal box which sits in the
bottom center of the fire place also has a slide damper to regulate or close
off the outside air supply. With the glass doors closed on my upstairs fire
place, it is amazing how well it will hold a fire.
Yours Truly,
Clifford Wilson
----- Original Message -----
From: Boyce, Ray
To: [email protected]
Sent: Tuesday, April 22, 2008 5:56 PM
Subject: [BlindHandyMan] How Do I Stop a Chimney Backdraft?
A: Chimneys operate on the basic law of physics, which is: Heat rises.
When the inside of the chimney gets hot, the rate of the upward draft
will increase
as well. If the backdraft only happens when the fire is first lit, then
the problem may correct itself as the inside of the chimney gets warmer.
When
lighting
the fire, use newspaper and small kindling to produce a high flame to
raise the chimney temperature faster and jump-start the draft effect.
Also, you may need a combustion air source to help maintain
the draft. Try partially opening a window in the same room as the
fireplace. Also,
make sure no exhaust fans (kitchen or
bath)
are running in the house while you have a fire.
There's also a correlation between the diameter of the flue
opening and the height of the chimney. The larger the flue diameter, the
taller
the chimney should be to ensure a good draft. If the backdraft is still
a problem after the chimney has had time to heat up, then you may need
to add an
extension on the top of the chimney to increase the draft.
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