15
4.14 Top Vent Connection, Through the Roof
Termination*
See figure 16.
Adapter #817VAK, pipe lengths, a vertical vent terminal, and
roof flashing will be required. Various other ceiling or roof
items may be necessary depending on the particular
installation (See venting options section of this manual).
4.15 Top Vent Connection, Offset and Through
the Roof Termination*
See figure 17.
For situations where offset is necessary in an attic to avoid
obstructions or allow useful space.
Adapter #817VAK, two 45° vent elbows, wall straps, a
vertical vent terminal, roof flashing and pipe lengths will be
required. Various other ceiling or roof items may be
necessary depending on the particular installation (See
venting options section of this manual).
*Note
1. The distance from the roof to the lowest terminal
discharge opening depends on the roof pitch and must be
in accordance with the manufacturer’s instructions
supplied with the termination unit.
2. The venting system for these appliances is considered
to be a Special Venting System. The rule in the
Installation Code CAN/CGA–B149 requiring a
minimum vent height of 2ft above any portion of a
building within 10ft does not, therefore, apply. (see
figure 17a)
Figure 16
Figure 17
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