27
. Venting
(continued)
4 Pipe Diameters min.
12 in. min.
Above Snow Line
Grade/Snow Line
Bird Screen
Vent & Intake
Vent
Combustion
Air
Figure 6: Horizontal Sidewall Termination
12 in. Min.
Above Snow Line
24 in. Min.
From Intake
6 Pipe Diameters Min.
Bird Screen
Vent & Intake
Vent
Combustion
Air
Figure 7: Slopped Roof Termination
24 in. Min.
Above Intake
12 in. Min.
Above Roof/Snow Line
24 in. Min.
From Parapet
6 Pipe Diameters Min.
Above Parapet
24 in. Min.
From Parapet
Bird Screen
Vent & Intake
Figure 8: Flat Roof Vent Terminations
CAUTION
CAUTION
I
nstalling multiple vent terminations too close together may result in combustion product water vapor conden
-
sation on building surfaces where vent terminations are placed, causing subsequent frost damage. To avoid/
minimize frost damage, extend the distance from building surfaces to vent termination end and increase the
horizontal distance between adjacent vent terminations
.
!
Notes:
1.
All terminations must have bird/rodent screens.
2. If Possible, Install Sidewall venting on a wall away from prevailing wind.
3.
For roof terminations, install vent terminal downstream of prevailing winds relative to intake terminal.
4.
It is recommended to use tee terminations with a vertical run in extra windy areas.
NOTICE
NOTICE
The required spacing between vent
and combustion air terminals is
to prevent flue gas recirculation.
Recirculation of flue gas products
into the combustion air supply can
cause damage to property or the
appliance.
Содержание BFITW 1000
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