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6 Pipe Diameters Min.
Bird Screen
Vent & Intake
24 in. Min.
Above Intake
12 in. Min.
Above Roof/Snow Line
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.
CAUTION
Installing multiple vent terminations too close
together may result in combustion product water
vapor condensation 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
Thermal Solutions, 1175 Manheim Pike, Lancaster, PA 17601 Website: www.thermalsolutions.com
24 in. Min.
From Parapet
Figure 10: Flat Roof Vent Terminations
CAUTION
.
Phone: 717-239-7642 Fax: 877-501-5212 Email: sales@thermalsolutions.com
24 in. Min.
From Parapet
Above Parapet
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.
F. Multiple Appliance Terminations
1. Vent Piping Terminations
a. Multiple appliance vent terminations are
shown in Figure 11.
b. Each individual appliance must have its
own vent pipe and vent terminal unless a
common venting system is used following the
guidelines of the group IV Venting, Section B.
Venting Design Requirements, sub section
"Engineered Venting Method" section in this
manual.
NOTICE
NOTICE
29
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