Appliance details

2.9.1 Venting optionsOpen combustion installation (SINGLE PIPE

Installing this water heater as a room sealed (TWIN

SYSTEM)

PIPE SYSTEM) is the recommended method. Contact

Not recommended in cold climate areas, see

BBTNA or dealer for available vent termination kits and

Chapter 2.8.

vent materials for this water heater.

 

i

Exhaust venting shall be done with 3" or

4" stainless steel (AL29-4C) vent pipe.

 

Room sealed installation (TWIN PIPE SYSTEM)

Fig. 12

Combustion air pipe: ≤ 26 ft (8 m)

Exhaust vent pipe: ≤ 26 ft (8 m)

Fig. 13

Combustion air pipe: ≤ 26 ft (8 m)

Exhaust vent pipe: A+B+C ≤ 23½ ft (7.2 m)

Note: reduce 2½ ft for each 90° elbow used after the first one, reduce 1 ¼ ft for each 45° elbow.

A maximum of three 90-degree elbows are permitted in both the exhaust and combustion air vent lengths.

The exhaust vent pipe and combustion air i pipe can be run vertically or horizontally.

Maximum length for each individual pipe is 26 feet (8 m) with one elbow, for each additional 90° elbow after the first elbow you must reduce 2½ feet from the total vent length, or 1 ¼ feet for each 45° elbow.

Fig. 14

Exhaust vent pipe: ≤ 26 ft (8 m)

Fig. 15

Exhaust vent pipe: A+B+C ≤ 23½ ft (7.2 m)

The exhaust vent system must vent directly to the outside of the building and an adequate amount of indoor combustion air must be provided for this installation. See chapter 2.8.

Connecting a one piece 90 degree elbow pipe to the combustion air inlet adaptor is necessary, this will prevent debris or objects from ever falling into the inlet opening.

Note: reduce 2½ ft for each elbow used after the first one, reduce 1 ¼ ft for each 45° elbow.

A maximum of three 90-degree elbows are permitted.

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