26
NOTES:
(1)
If an offset is necessary in the attic to avoid
obstructions, it is important to support the vent
pipe every
3’ (914 mm)
, to avoid excessive stress
on the elbows, and possible separation. Wall straps
are available for this purpose (see Figure 38).
(2)
When ever possible, use 45
°
degree elbows instead
of 90
°
degree elbows. The 45
°
degree elbow offers
less restriction to the flow of flue gases and intake
air.
(3)
For multi story installations; a ceiling firestop is
required at the second floor, and any subsequent
floors (see Figure 39). The opening should be
framed to
10” (254 mm)
x
10” (254 mm)
inside
dimensions, in the same manner as shown in Figure
40.
(4)
Any occupied areas above the first floor, including
closets and storage spaces, which the
vertical vent passes through, must be
enclosed. The enclosure may be framed
and sheet-rocked with standard building
materials. However consult the appliance
manufactures 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 required air spaces with
insulation.
Figure 28: Use of Wall Straps.
Figure 29: Multi-Story Vent Pipe Installation
Initial Installation
QUALIFIED INSTALLERS ONLY
Summary of Contents for Nova Q2
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