Installation Instructions

DUCTWORK LENGTH AND DUCT FITTINGS

NOTE: Do not exceed 150 foot maximum permissible equivalent lengths!

Flexible ducting: If flexible metal ducting is used, all equivalent feet values in the table should be doubled. The flexible metal duct should be straight and smooth and extended as much as possible.

DO NOT use flexible plastic ducting.

Add equivalent lengths for all duct pieces and transitions used to ensure that the duct run does not exceed the maximum 150 feet.

Duct

Equivalent

Duct

Equivalent

Duct

Equivalent

Pieces

Length*

Pieces

Length*

Pieces

Length*

 

 

 

 

314x 10

 

6Round

 

314x 10

 

to 6Round

4 ft.

1 ft. (per

8 ft.

Transition

 

Straight

foot length)

45° Elbow

90° Elbow

 

 

 

314x 10

 

314x 10

 

6Round

 

1 ft. (per

33 ft.

Wall Cap

24 ft.

Straight

foot length)

90° Flat Elbow

with Damper

 

 

 

 

 

6Round

 

314x 10

 

6

12 ft.

to 314x 10

2 ft.

Wall Cap

24 ft.

90° Elbow

 

Transition

 

with Damper

 

 

 

314x 10

 

 

 

6

7 ft.

to 6Round

2 ft.

6Round

33 ft.

45° Elbow

Transition

 

Roof Cap

 

 

 

 

 

6Round

 

 

 

314x 10

 

to 314x 10

4 ft.

 

 

14 ft.

Transition

 

 

 

 

 

90° Elbow

90° Elbow

 

 

 

 

 

 

 

SHOULD NOT EXCEED 150 EQUIVALENT FEET

*Equivalent lengths of duct pieces are based on actual tests conducted by GE Evaluation Engineering and reflect requirements for good venting performance. See chart for CFM Duct Length.

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GE JVB37, JVB67, JVB98, JVB94 owner manual Ductwork Length and Duct Fittings, Should not Exceed 150 Equivalent Feet

JVB94, JVB98, JVB37, JVB67 specifications

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