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21
W415-0748 / 12.12.08
3.3 USING RIGID VENT COMPONENTS
The vent system must be supported approximately every 3 feet for both vertical and horizontal runs. Use Wolf
Steel vent spacers W615-0033 every 3 feet and on either side of each elbow to maintain the minimum 1 1/4”
clearance between the outer rigid vent pipes and inner rigid vent pipes. Use Wolf Steel Ltd. support ring
assembly or equivalent noncombustible strapping to maintain the minimum clearance to combustibles for both
vertical and horizontal runs.
All inner exhaust and outer intake vent pipe joints may be sealed using either red high temperature silicone
sealant W573-0002 (not supplied) or black high temperature sealant W573-0007 Mill Pac (not supplied) with
the exception of the fireplace exhaust flue collar which must be sealed using Mill Pac.
25.1
3.3.1 HORIZONTAL AIR TERMINAL INSTALLATION
3.3.2 EXTENDED HORIZONTAL AIR TERMINAL INSTALLATION
A. Follow the instructions for "HORIZONTAL AIR TERMINAL INSTALLATIONS" section.
B.
Continue adding components alternating inner rigid pipe and outer rigid pipe. Ensure
that all inner rigid pipe and elbows have sufficient vent spacers attached and each
component is sealed and securely fastened to the one prior. Attach the inner telescopic
sleeve to the vent run. Repeat using the outer telescopic sleeve. Seal and secure as
before. To facilitate completion, attach inner and outer couplers to the air terminal.
C. Install the air terminal. See “HORIZONTAL AIR TERMINAL INSTALLATION” section.
TELESCOPIC
SLEEVE
VENTING
AIR TERMINAL
20"
COUPLER
55.1
FIGURE 3.3.1
FIGURE 3.3.2
A. Move the fireplace into position. Measure the vent length required between
terminal and fireplace taking into account the additional length needed
for the finished wall surface and any 1¼" overlaps between venting
components.
B. Apply high temperature sealant W573-0007 (not supplied) to the outer
edge of the inner collar of the fireplace. Attach the first inner rigid
pipe component and secure using 3 self tapping screws. Repeat
using the outer rigid pipe.
C.
Insert the vent pipes through the firestop maintaining the required clearance to combustibles. Holding the
air terminal (lettering in an upright, readable position), secure to the exterior wall and make weather tight
by sealing with caulking (not supplied).
The air terminal mounting plate may be recessed into the exterior wall or siding no greater than the
depth of its return flange.
SEALANT
HI-TEMP
OUTER
PIPE
INNER
PIPE
CAULKING
2" OVERLAP
SCREWS
#10 x 2½"
26.2
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