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Scenario #2 - Roof Support Bracket
A roof support bracket type installation is used for cathedral ceilings where a cathedral ceiling support is not
preferred. This type of installation involves Ventis Class-A chimney pipe being visible below the ceiling level.
Note: A roof support bracket can support no more than a total of 30 feet of Ventis Class-A Chimney Pipe, and
no more than 20 feet below the roof support bracket.
Step 1
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Position appliance: locate appliance in accordance with the appliance manufacturer’s instructions and
clearance specifications. Pay particular attention to the outlet flue collar of the appliance and endeavor to
position it between the rafters and joists above.
Step 2
The Roof Opening: Use a plumb bob to locate the center of the roof opening as it corresponds to the
center of the opening below. Mark the location on the underside of the roof sheeting. Drill a hole using a ¼” bit
through the sheeting and shingles in order to have an exterior visible reference. A reciprocating saw is helpful
in cutting the opening a minimum of 4-inches larger than the chimney’s outside diameter. This maintains the
required minimum of 2-inch air space clearance around the chimney.
Note: The roof opening must be sized to
Table 1 on page 8 and framed out with the appropriate sized construction lumber. DO NOT mount Roof Support
Bracket to sheathing only!
Step 3
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Secure roof support bracket: Secure the roof support bracket to the roof using four 6-penny nails or
four #8 x 1 ½” screws per side. Using one section of Ventis Class-A chimney, position it at the proper height
into the living space. Ensure that the chimney extends at least 3 inches below the ceiling level. Tighten the roof
support bracket band to that chimney section by tightening the nut bolt. Using a minimum of four self drilling
screws, screw the band to the chimney section.
Step 4
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Assemble the Chimney: Attach the remaining chimney sections above and below the roof level. Use
a minimum of four self drilling screws to attach per joint.
Step 5
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Trim Collar – Slide trim collar over
Ventis Class-A
chimney and attach to ceiling using screws
provided. Attach universal adapter to the lowest section of
Ventis Class-A
to attach connector pipe below. Use
a minimum of four self drilling screws.
Note: a finishing collar should be installed over the universal adapter
for appearance purposes only.
Ensure the connector pipe maintains the proper clearance to combustibles See
Page 3.
Step 6
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Finish the installation: Please refer to Step 8 on Page 12 to complete the installation
