Appliance details

The maximum flue gas exhaust temperature on the 2400 E is 437°F (225°C)

Venting

Exhaust

* Exhaust

* Exhaust

Combustion

Combustion

Vent pipe

Vent pipe

Options

vent

vent

vent

air pipe

air pipe

clearances

clearances

 

diameter

maximum

minimum

diameter

maximum

within an

within an

 

and

length

length

and material

length

unenclosed

enclosed

 

material

 

 

 

 

space

space

 

 

 

 

 

 

 

 

Room

3 or 4+

26 feet (8

3 feet

3 inch PVC,

26 feet (8

** See vent

** See vent

sealed

inch

m) with one

 

aluminum or

m) with one

manufacturer's

manufacturer's

(twin pipe)

stainless

elbow. Less

 

galvanized

elbow. Less

specifications

specifications

 

steel

2½ feet for

 

pipe

2½ feet for

 

 

 

(AL29-4C)

each

 

 

each

 

 

 

sealed vent

additional

 

 

additional

 

 

 

pipe

90° elbow

 

 

90° elbow

 

 

Open

3 or 4+

26 feet (8

3 feet

See

See

** See vent

** See vent

combustion

inch

m) with one

 

chapter 2.8

chapter 2.8

manufacturer's

manufacturer's

(single

stainless

elbow. Less

 

 

 

specifications

specifications

pipe)

steel

2½ feet for

 

 

 

 

 

 

(AL29-4C)

each

 

 

 

 

 

 

sealed vent

additional

 

 

 

 

 

 

pipe

90° elbow

 

 

 

 

 

 

 

 

 

 

 

 

 

Exhaust vent is always fan assisted. Installation of exhaust vent and combustion air piping may be run vertically or horizontally and in separate directions if required.

+The exhaust collar on the water heater is 3" diameter and its collar must always be used, a 3" to 4" increaser will be required to be first connected to the exhaust collar when 4" venting is used.

* A maximum of three 90 degree elbows are permitted in both the exhaust and combustion air vent lengths. The total vent length must be reduced by 1 ¼ feet for every 45° elbow used in the vent system.

** Stainless steel (AL29-4C) vent pipe is manufacturerd by Z-Flex, Protech and Heat Fab. NOTE: clearance distances are variable depending if the vent pipe is installed in an enclosed or unenclosed space, the exhaust flue gas temperature and the orientation of the vent pipe.

Table 3

The appliance should be located as close to the point of termination as possible. The maximum vent length is 26 feet (8 m) with one 90 degree elbow. Subtract 2½ feet from the total vent length for each additional 90° elbow used (a maximum of three 90° elbows are permitted in the total vent length), or subtract 1 ¼ feet for every 45° elbow used. Horizontal sections of vent must pitch ¼" for every foot of horizontal length, to prevent the pooling of condensate, and be supported at 4 foot intervals with overhead hangers.

Note: Listed thimbles or collars are necessary to pass through wall and ceiling partitions. If the vent system passes through combustible areas where the vent clearance requirements cannot be maintained, it is permissible to chase straight sections of sealed 3 inch single wall vent through 4 inch (or greater) Type-B vent. The distance to combustibles using this chase technique is 1 inch. Note: Type-B vent should never be used as the actual exhaust vent system for the appliance, as it is not gas tight.

Minimum exhaust vent size and length

The minimum exhaust vent length is 3 feet.

The use of a 90 degree elbow is equivalent to 2 ½ ft in vent length. The use of 45 degree elbow is equivalent to 1 ¼ ft in vent length.

Fig. 7

Maximum exhaust vent and combustion air inlet lengths

Fig. 8

10

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