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The minimum clearance to combustibles is 6” (150 mm) when using single wall venting and 1” (25 mm)
when using “B-vent” venting.
We strongly recommend installing an approved chimney liner in an existing brick chimney. This will
maximize the potential draft of the chimney and lessen the effects of slow chimney start-up.
VENTING OF A FIREPLACE FITTED WITH THE DRAFTHOOD ADAPTOR:
Note:
Please refer to the chimney manufacturer’s installation instructions prior to commencing the
installation.
Figure 46: Unit top venting styles.
4" (10cm)
vent
6" (15cm)
optional
decorative
cover
Check vent draft
at the top row of
opening.
Figure 48: Draft test place.
Figure 47: Unit rear
venting style.
SPILLAGE TEST:
A spillage test must be performed prior to leaving the installed fireplace with the customer. Perform this
test in the following manner:
This unit may be vented to an existing masonry chimney, or where
no masonry chimney is available, an approved “B-vent” chimney,
or any other approved constructed chimney/vent system (see
Figure 46 & 47).
In either case, the fireplace may be connected to the chimney/
vent using a 4” (10 cm) single wall vent connector.
When an existing masonry chimney is utilized for the venting, we
recommend the vent connector be connected to an approved 4”
(10 cm) diameter flue liner running the full height of the chimney.
In many jurisdictions this flue liner may be mandatory.
If 4” (10 cm) single wall vent is used, a minimum of 6” (15 cm) must
be maintained between the vent connector and any combustibles.
If 4” (10 cm) “B-vent” is used a minimum of 1” (25 mm) must be
maintained between the vent connector and any combustibles.
CAUTION:
A minimum vent height of 12’ (3.6 m) from the floor
is required to effectively vent this fireplace.
Initial Installation
1. Close all windows and doors in the room.
2. Start all exhaust fans in the house and the
furnace blower.
3. Light the fireplace and set to maximum
flame adjustment.
4. After a minimum of 10 minutes operation,
test the chimney draft with a smoke match
at the top row of the pattern to confirm
that there is adequate draft or ‘pull’ at the
openings around the body of the Drafthood
Adaptor, as shown in Figure 48.
Summary of Contents for westport-steel
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