Exhaust Venting - Takagi 110 Indoor (T-KJr2-IN) Installation Manual And Owner's Manual

For the 110 Indoor (T-KJr2-IN), 310 Indoor (T-K4-IN), and 510 Indoor
This is a Category III appliance and must be vented accordingly. 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.
• When the vent run exceeds 5 ft. (1.5 m), a condensate drain is recommended. It should be
installed as close to the heater as possible.
• The maximum length of exhaust vent piping must not exceed 50 ft. (15.2 m) (deducting 5 ft. (1.5
m) for each elbow used in the venting system). Do not use more than 5 elbows.
Diameter
4 in. (102 mm)
*For each elbow added, deduct 5 ft. (1.5m) from max. vent length.
No. of Elbows
0
1
2
3
4
5
Excludes elbow termination, rain caps, or the 4 in. (102 mm) Concentric termination

-Exhaust venting-

(T-D2-IN) models
Max. No. of Elbows Max. Vertical and Horizontal (Total) Vent Length
5
Max. Vertical or Horizontal Vent Length
14
50 ft. (15.2 m )
50 ft. (15.2 m)
45 ft. (13.7 m)
40 ft. (12.2 m)
35 ft. (10.7 m)
30 ft. (9.1 m)
25 ft. (7.6 m)
Page
Installation Manual
Installation