Grand Bay 40 Direct Vent Freestanding
Page 27
January 2000
VERTICAL TERMINATIONS (cont.)
USING GS SERIES PIPE (cont.)
Step 7.
Continue to assemble pipe sections until the height of the vent cap (H) (Figure 15) meets
the minimum code requirements described in code requirements as outlined in the current
CAN/CGA-Bl49 Installation Codes (in Canada), the National Fuel Gas Code NFPA 54/
ANSI Z223.1 (in USA), or local codes. Note that for steep roof pitches, the vent height
must be increased. In high wind conditions, nearby trees adjoining rooflines, steep pitched
roofs, and other similar factors can result in poor draft, or down drafting. In these cases
increasing the vent height may solve this problem.
Step 8
. Twist-lock the vent cap and seal.
NOTE:
(1)
For multistory vertical installations, a ceiling firestop (SDV part #963) is required at the
second floor, and any subsequent floors (Figure 16). The opening should be framed to 10
x 10 (254mm x 254mm) inside dimensions, in the same manner as shown in Figure 13.
(2)
Any occupied areas above the first floor, including closets and storage spaces, which the
vertical vent passed through must be enclosed. The enclosure may be framed and
sheetrocked with standard construction materials; however, refer to these installation
instructions for the minimum allowable clearance between the outside of the vent pipe
and the combustible surfaces of the enclosure. Do not fill any of the required air space
with insulation.
FIG. 16
FIG. 15
DuraVent #991
VENTING:
VER
TICAL
TERMINA
TIONS
