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Page
-Vent length and No. of Elbows-
The vent system must be sealed airtight. All seams and joints
without gaskets
must be sealed with high
heat resistant silicone sealant or UL listed aluminum adhesive tape having a minimum temperature rating
of 350 °F (177 °C). For best results, a vent system should be as short and straight as possible.
•
This water heater is a Category III appliance and must be vented accordingly with any 4 in. (102
mm) vent approved for use with Category III or Special BH type gas vent.
•
Follow the vent pipe manufacturer’s instructions when installing the vent pipe.
•
Do not common vent this appliance with any other vented appliance.
(Do not terminate vent
into a chimney. If the vent must go through the chimney, the vent must run all the way through
the chimney with Category III approved or Special BH vent pipe.)
•
When the horizontal vent run exceeds 5 ft (1.5 m), support the vent run at 3 ft (0.9 m) intervals
with overhead hangers.
•
The maximum length of exhaust vent piping must not exceed
60 ft (18.3 m)
.* Deduct 5 ft
(1.5 m) for each 90° elbow used in the venting system. Do not use more than
6 elbows
. A 45°
elbow is equivalent to 2.5 ft of vent length.
*If vent termination kit
100187154
is used in the installation, the maximun length of
exhaust
vent pipe
must not exceed
55 ft (16.8 m)
, and the vent run must not exceed 5 elbows. Vent termination kit
100187154 also has specific DIP switch settings. Refer to p. 22.
Vent type
Diameter
Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length
Intake**
3 in. (76 mm)
6**
60 ft (18.3 m )*
Exhaust
4 in. (102 mm)
5
55 ft (16.8 m )*
*For each 90° elbow added, deduct 5 ft (1.5m) from max. vent length.
**For Intake vent, refer to the above table of the installation of 6 elbows and 60 ft.
Vent type
Diameter
Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length
Intake
3 in. (76 mm)
6
60 ft (18.3 m )*
Exhaust
4 in. (102 mm)
6
60 ft (18.3 m )*
*For each 90° elbow added, deduct 5 ft (1.5m) from max. vent length.
No. of Elbows
Max. Vertical or Horizontal
Vent Length
No. of Elbows
Max. Vertical or Horizontal
Vent Length
0
60 ft (18.3m)
4
40 ft (12.2 m)
1
55 ft (16.8 m)
5
35 ft (10.7 m)
2
50 ft (15.2 m)
6
30 ft (9.1 m)
3
45 ft (13.7 m)
Excludes elbow termination, rain caps, or the 4 in. (102 mm) Concentric termination.
No. of Elbows
Max. Vertical or Horizontal
Vent Length
No. of Elbows
Max. Vertical or Horizontal
Vent Length
0
55 ft (16.8 m)
3
40 ft (12.2 m)
1
50 ft (15.2 m)
4
35 ft (10.7 m)
2
45 ft (13.7 m)
5
30 ft (9.1 m)
Excludes sidewall termination.
Installation
Installation Manual
Standard Vent Terminations
(See the next table for vent termination 100187154.)
Installation with vent termination kit 100187154
