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For Horizontal Vent Termination - PVC/CPVC Material Only
• Use a condensation drain if necessary.
• In the Commonwealth of Massachusetts a carbon monoxide detector is required for all side wall horizontally
vented gas fuel equipment. Refere to the page 4 for more detail information.
Possible Orientations
≥ 3ft Min.
3 in. (75 mm) pipe and 2 in. × 3 in.
Increaser couplings required
when using plastic horizontal
hood terminations.
Increaser couplings must be
installed just above the units vent
flue connections.
Slope the horizontal exhaust vent
1/4 in. upwards for every 12 in.
(305 mm) toward the termination.
12 in. (305 mm) above
grade or over
maximum snow level
12 in. (305 mm) above
grade or over
maximum snow level
Ceiling
Interior Wall
(e.g. Horizontal Hood Termination installation)
(e.g. Horizontal Hood Termination installation)
(e.g. Low Profile Termination )
Exhaust
3 in. (75 mm) or
2 in. (50 mm)
Intake
3 in. (75 mm) or
2 in. (50 mm)
Intake*
Intake
Overhang
Exhaust*
Exhaust
2 in. or 3 in.
Low Profile
Termination
Exterior Wall
If 3 ft (0.9 m) distance between Intake and Exhaust cannot be
ensured, the installation can be carried out only in the installation
method shown in “Alternate Horizontal Vent Termination”.
The PVC/CPVC elbow may be used in place of Hood
Termination as the horizontal vent termination.
Hood Termination
3 in. (75 mm)
* When choosing intake and exhaust terminations, you
must use the same type of elbow (i.e. both 90° elbows).
This will help with proper combustion by putting both
terminations in the same pressure zone.
Hanger Straps
≥ 12 in. (305 mm) Min.
6.4.2 Horizontal Vent Termination
Venting the Combi Boiler
Содержание GHQ-C3201WX-FF PB US
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