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15
CHIMNEY INSTALLATION
53D9041. Rev 1 03/03
3. Enclose the chimney where it passes through the living spaces to prevent contact with and possible damage
to the chimney.
4. Install firestop spacers at each ceiling level.
5. Install the proper chimney cap or chimney housing on the chimney to prevent the entry of rain and debris
into the chimney and to assure the proper venting of smoke.
6. Do not use more than four elbows in the chimney.
NOTE: To select the proper chimney height, refer to Figure 1. The flue outlet must be a minimum of three feet
above the highest point where the chimney penetrates the roof and a minimum of two feet above all portions
of the building within ten feet. (see figure 12) If the chimney is to include elbows to offset the chimney, refer to
the Chimney Offset and Cap Installation section of this manual. There must be at least two inches air space
between all sections of the chimney and combustible materials between floors.
1. Lay out, cut and frame openings through all ceilings and the roof at the point where the chimney will pass
through. Unless the chimney is to be offset, the point where the center line of the chimney will pass
through the ceiling and roof can be determined with a plumb line as shown by Figure 15. The fireplace
should be located in the planned installation position. After the center line is established and a nail is
driven to mark the point, the opening can be cut if you are satisfied with the chimney location relative to
ceiling and roof joists and/or any other obstructions. The roof opening center line should be marked by
driving a nail through the roof from underneath that will penetrate the roof and can be located from the
rooftop. If the chimney is to penetrate a pitched roof, the hole in the roof must be rectangular instead of
square and should be sized according to Table 1.
2. Install the firestop spacer as required from beneath the ceiling unless the space above is attic space. In an
attic, the firestop spacer should be installed at the floor level of the attic. Figure 17. You must have joists
or headers on all four sides of the spacer and use a minimum of four 8-penny nails to secure the spacer.
3. To install the “S” series chimney sections, insert the male end of the flue, the smallest diameter pipe, into
the flue outlet of the fireplace and press down until the snap locks engage. Continue the process, adding
the chimney sections on top of each other until the chimney is at least six inches above the roof opening on
all sides. As the chimney sections are installed, check each joint to make sure it is properly locked to the
previous section. If additional strength of the outer pipe joints is desired, you may use two or three sheet
metal screws placed through the area where the outer pipes overlap one another. To install these screws,
drill a 1/8-inch diameter hole through the chimney sections, taking care not to penetrate the inner flue pipe.
Warning: Be very careful when drilling the holes into the outer pipe. The drill must not penetrate the inner
stainless steel pipe.