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Idiomas disponibles
Idiomas disponibles
Calculating Duct Length Table
For maximum efficiency, use the shortest and straightest duct possible. Use as few fittings
as
possible. For best performance,
the duct run should not exceed 100 feet of equivalent length.
Calculations
are approximate
and based on HVAC industry
standards.
DUCT
PIECES
EQUIVALENT
NUMBER
EQUIVALENT
LENGTH
X
USED
--
LENGTH
6" (15.2cm) Round
Straight
_
1 Ft. (0.3m)
Ft. or m
6" (15.2cm) Round Metal
Flex
No Bends _
1.5 Ft. (0.45m)
Ft. or m
(_
6" (15.2cm)
10 Ft. (3m)
Ft.
or
m
90 ° Elbow
Q_
6" (15.2cm)
45 ° Elbow
5 Ft. (1.5m)
Ft. or m
[__
31/4" x 10" (8.2cm x 25.4cm)
Straight
_
1 Ft. (0.3m)
Ft. or m
31/4" x 10" (8.2cm x 25.4cm)
10 Ft. (3m)
Ft. or m
90 ° Elbow
31/4'' x 10" (8.2cm x 25.4cm)
45 ° Elbow
5 Ft. (1.5m)
Ft. or m
31/4"
x
10"
10 Ft. (3m)
Ft. or m
(8.2cm
X
25.4cm)
90 ° Flat Elbow
31/46:, X 10" (8.2cm x 25.4cm)
to
(15.2cm) Round Transition
30 Ft. (9m)
Ft. or m
90 ° Elbow
6" (15.2cm) Round to 31/4" x 10"
(8.2cm x 25.4cm)
Transition
30 Ft. (9m)
Ft. or m
90 ° Elbow
31/4" x 10" (8.2cm x 25.4cm)
to
5 Ft. (1.5m)
Ft. or m
6" (15.2cm) Round Transition
6" (15.2cm) Round to
31,/4 '' X 10"
(8.2cm x 25.4cm)
Transition
5 Ft. (1.5m)
Ft. or m
6" (15.2cm) Round Wall
Cap
with Damper
30 Ft. (9m)
Ft. or m
[_
31/4" x 10" (8.2cm x 25.4cm)
Wall
Cap with Damper
30 Ft. (9m)
Ft. or m
(15.2cm) Round Roof Cap
30 Ft. (9m)
Ft. or m
6"
TOTAL DUCTWORK
Ft. or m
_
For Straight Round / Rectangular
Duct, measure actual linear
feet used and then multiply by Equivalent
Length shown.
14
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