Minimum and Maximum Vent Lengths

Charts are for installation from 0 - 2000 ft. elevation ONLY. (Please see supplement sheet for installations above 2000 feet.)

NOTICE: Be sure to mount inlet vent terminal 6 inches higher than the outlet vent terminal. Vent terminals need to be a minimum of 7 inches (center to center) horizontally apart and a maximum of 24 inches apart.

GP100-150 & GP100-200

Venting Information for 3” Vents

Number of 90º Elbows with

Number of

Minimum Pipe

Maximum

Vent Terminal

Length equired

Pipe Length

45º Elbows

Inlet Vent

Outlet Vent

(Ft)

(Ft)

 

 

 

 

 

 

 

 

 

One (1)

One (1)

None

5.0

40.0

 

 

 

 

 

One (1)

One (1)

One (1)

2.5

37.5

 

 

 

 

 

Two (2)

Two (2)

None

5.0

35.0

 

 

 

 

 

Two (2)

Two (2)

One (1)

2.5

32.5

 

 

 

 

 

Three (3)

Three (3)

None

5.0

30.0

 

 

 

 

 

Three (3)

Three (3)

One (1)

2.5

27.5

 

 

 

 

 

Four (4)

Four (4)

None

5.0

25.0

 

 

 

 

 

Four (4)

Four (4)

One (1)

2.5

22.5

 

 

 

 

 

Vent lengths for the inlet and the outlet pipes should not have a dif- ference of more than five (5) equivalent feet.

Venting Information for 4” Vents

Number of 90º Elbows with

Number of

Minimum Pipe

Maximum

Vent Terminal

Length Required

Pipe Length

45º Elbows

Inlet Vent

Outlet Vent

(Ft)

(Ft)

 

One (1)

One (1)

None

10.0

50.0

 

 

 

 

 

One (1)

One (1)

One (1)

9.5

47.5

 

 

 

 

 

Two (2)

Two (2)

None

5.0

45.0

 

 

 

 

 

Two (2)

Two (2)

One (1)

2.5

42.5

 

 

 

 

 

Three (3)

Three (3)

None

5.0

40.0

 

 

 

 

 

Three (3)

Three (3)

One (1)

2.5

37.5

 

 

 

 

 

Four (4)

Four (4)

None

5.0

35.0

 

 

 

 

 

Four (4)

Four (4)

One (1)

2.5

32.5

 

 

 

 

 

GP100-250

Venting Information for 4” Vents

Number of 90º Elbows with

Number of

Minimum Pipe

Maximum

Vent Terminal

Length Required

Pipe Length

45º Elbows

Inlet Vent

Outlet Vent

(Ft)

(Ft)

 

One (1)

One (1)

None

10.0

45.0

 

 

 

 

 

One (1)

One (1)

One (1)

7.5

42.5

 

 

 

 

 

Two (2)

Two (2)

None

5.0

40.0

 

 

 

 

 

Two (2)

Two (2)

One (1)

2.5

37.5

 

 

 

 

 

Three (3)

Three (3)

None

5.0

35.0

 

 

 

 

 

Three (3)

Three (3)

One (1)

2.5

32.5

 

 

 

 

 

Four (4)

Four (4)

None

5.0

30.0

 

 

 

 

 

Four (4)

Four (4)

One (1)

2.5

27.5

 

 

 

 

 

Vent lengths for the inlet and the outlet pipes should not have a difference of more than five (5) equivalent feet.

GP100-250 can only be vented with four (4) inch PVC pipe and fit- tings. Use only the vent terminals supplied withthe water heater

HORIZONTAL VENT TERMINAL LOCATION - The location of the vent terminal depends on the minimum clearances and consider- ations shown in the charts on pages 11 and 12..

Vent lengths for the inlet and the outlet pipes should not have a differ- ence of more than five (5) equivalent feet.

NOTICE: 3” and 4” vent pipe should not be mixed, other than to reduce the 4” vent for the 3” PVC Vent Terminal. This unit is supplied with two (2) 3-inch Schedule 40 PVC 45º vent terminals.

The 4” vent pipe can use up to 16 inches of 3” PVC, preceding the vent terminal. This unit uses the same vent terminals (sup- plied with the unit) for both 3” and 4” pipe. A 4” to 3” reducer will be required to go from 4” to 3” pipe.



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Rheem Commercial Power Direct Vent Water heater installation instructions Minimum and Maximum Vent Lengths

Commercial Power Direct Vent Water heater specifications

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