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• Minimum total venting run allowed is 20 ft (6.1m), see boxed notes in Figures 2 & 3. If required
venting run is shorter than 20ft (6.1m) the fireplace must be direct vented. See fireplace installation manual
for further information regarding permitted venting and restrictions.
• Maximum total venting run allowed is 110 ft (33.5m) (V
Figures 2 & 3.
• Maximum negative vertical run allowed is 4ft (1.2m) as measured from the elbow where it started
(see V2 in Figures 2 and 3).
Multi-elbow installations are possible with a maximum of six (6) 90° elbows (two (2) 45° elbows is
•
equivalent to one (1) 90° elbow)
NOTE: A 90° elbow in the horizontal plane is equivalent to 3' of vent and a 45°
elbow in the horizontal plane is equivalent to 1 1/2', these equivalencies must be added
to the total vent length.
• IMPORTANT: This power vent kit has been approved for use with only Duravent 3" x 5" CVS Venting.
Specific venting adaptors are required (not included) for both the fireplace and power head to enable
the use of 3" x 5" CVS. Refer to Table 2 below for the required adaptors and part numbers.
Description
4 x 6 5/8" to 3" x 5" CVS
5" x 8" to 4 x 6 5/8" *see below*
5" x 8" to 3" x 5" CVS
3" x 5" CVS to 4 x 6 5/8"
* If 5" x 8" to 4 x 6 5/8" reducer is used, 4 x 6 5/8" to 3" x 5" CVS adaptor must be used as well. 5" x 8"
to 4 x 6 5/8" reducer can also be ordered using Urbana Part #50-2321.
• Venting Clearances: 1" (25 mm) clearance to combustibles must be maintained around any vertical vent
pipe. Around a horizontal vent pipe, the clearance to combustibles should be 2" (51 mm) above and 1" (25
mm) on the sides and bottom. When combustible materials are directly above a 90° elbow, 3" (76 mm) of
clearance is necessary. Additionally all venting clearances, within the chase, must be followed as listed in
the fireplace installation manual.
4 |
Plan out the venting and wiring installation. Important notes to
consider when planning where the venting will be installed:
Table 2: CVS Vent Adaptors
Fireplace End
Duravent Part #
46DVA-X35CVS
58DVA-X46
58DVA-X35CVS
Power Head End
35CVS-X46DVA
Installation - Venting
+ H
+ V
+ H
+ H
+ H
1
1
2
2
3
Model
U30
U50
X
X
X
Model
X
X
+ H
), refer to
4
5
U70
X
X
X
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