EXHAUSTO
2. The Flue is Bigger than the Fan Base.
If the flue size exceeds the size of the fan base,
it is necessary to alter the top of the chimney by
installing a support flange, made out of stainless steel,
as shown below.
The support flange must be secured and the hole
in the center must be 12" in diameter.
3. The Flue Pipe is Higher than the Chimney.
In many cases, the chimney is designed so the
liner or the chimney insert sticks several inches up over
the chimney top. If it is a few inches, it’s recommended
to install the chimney fan on the top, provided the pipe
will give enough support for the fan.
If there’s insufficient support, the liner or the flue
must be cut back, so it is flush with the top of the
chimney and the chimney fan can be installed as
described in the previous.
4. Two Flues Servicing One Fireplace
This solution is used by many designers when the
fireplace opening is large, and the total flue opening
must be larger than a standard pipe or liner.
By installing two separate flues the builder has
accomplished a total flue opening big enough for the
fireplace opening.
When sizing a chimney fan for this kind of appli-
cation, there are two ways to go about it:
One of the flues must be shut off or disconnected
and the chimney fan installed on the open flue, or
A chimney fan should be installed on each flue
and operate in tandem.
Note:
Using only one flue can cause problems
with flow noise due to high velocities. Chimney fans
operating in tandem should always be of the same size.
Call EXHAUSTO for sizing recommendation.
Fig. 18
Fig. 19
Dilution bolts
15
Содержание EXHAUSTO RS 12
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