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.
im nm
1 ft. (per
foot length)
1 ft. (per
foot length)
15ft.
I_]f_i _ II_ _ i0_l L=_111_'1_
6" Round
3W" x 10" 3V4" x 10" 24 ft. Wall Cap 21 ft,
Straight 90 ° Flat Elbow with Damper
(_ 6" Round [_ 3V4" x 10"
6" to 3V4" x 10" 7 ft. Wall Cap 27 ft.
90 ° Elbow Transition with Damper
3V4" x 10" _
6" to 6" Round 5 ft. ]_ 6" Round 20 ft.45 ° Elbow 9 ft. Transition Roof Cap
6" Round
to 3V4" x 10" 20 ft,
3W" x 10" Transition 6" Round 24 ft.
90 ° Elbow 16 ft. 90 ° Elbow Roof Vent
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,
i
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