Thermador VCIN36JP Installation Instructions - Page 10

Equivalent Duct Lengths For Commonly Used Transitions

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EQUIVALENT DUCT LENGTHS FOR COMMONLY USED TRANSITIONS Duct Piece Smooth Straight 3¼" x 10" Straight Size of Duct Equivalent Piece (in) Length (ft) 6 1.2 7 0.95 8 0.7 10 0.6 N/A 1 Duct Piece 3¼" x 10" to Round 90° Elbow 3¼" x 10" Center Reverse Elbow Left 3¼" x 10" Center Reverse Elbow Right Size of Duct Equivalent Piece (in) Length (ft) 6 10 7 5 N/A 15 N/A 25 3¼" x 14" Straight 90° Elbow Round 45° Elbow Round 3¼" x 10" 90° Elbow Round 3¼" x 10" 45° Elbow Round 3¼" x 10" Flat Elbow Round to 3¼" x 10" 3¼" x 10" to Round Round to 3¼" x 10" 90° Elbow N/A 0.7 6 12 7 8 8 6 6 5 7 4 8 3 N/A 5 N/A 15 N/A 20 6 1 7 1 6 5 7 3 6 10 7 8 3¼" x 10" Left Reverse Elbow N/A 15 3¼" x 10" Right Reverse N/A 25 Elbow 6 2 Round Wall Cap 7 2 8 2 10 2 Round Roof Cap 2' Long 3¼" x 10" Flex 6 2 7 2 8 2 N/A 20 3¼" x 10" to Round 10 1 7" Inline Backdraft 7 Damper 3¼" x 10" Roof Jack N/A and Shutter NOTE: These commonly used installation parts can be purchased at a local hardware store. THERMADOR® does not manufacture all these parts. Table 4: Duct Lengths English 8

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English 8
Smooth
Straight
6
1.2
7
0.95
8
0.7
10
0.6
3¼" x 10"
Straight
N/A
1
3¼" x 14"
Straight
N/A
0.7
90° Elbow
Round
6
12
7
8
8
6
45° Elbow
Round
6
5
7
4
8
3
3¼
"
x 10"
90° Elbow
Round
N/A
5
3¼” x 10"
45° Elbow
Round
N/A
15
3¼
"
x 10"
Flat Elbow
N/A
20
Round to
3¼
"
x 10"
6
1
7
1
3¼
"
x 10"
to Round
6
5
7
3
Round to
3¼
"
x 10"
90° Elbow
6
10
7
8
3¼
"
x 10"
to Round
90° Elbow
6
10
7
5
3¼
"
x 10"
Center Reverse
Elbow Left
N/A
15
3¼
"
x 10"
Center Reverse
Elbow Right
N/A
25
3¼
"
x 10" Left
Reverse Elbow
N/A
15
3¼
"
x 10"
Right Reverse
Elbow
N/A
25
Round
Wall Cap
6
2
7
2
8
2
10
2
Round
Roof Cap
6
2
7
2
8
2
2' Long
3¼
"
x 10"
Flex
N/A
20
3¼
"
x 10"
to Round
10
1
7" Inline
Backdraft
Damper
7
3¼
"
x 10"
Roof Jack
and Shutter
N/A
NOTE:
These commonly used installation parts can be purchased
at a local hardware store. THERMADOR® does not manufacture all
these parts.
Duct Piece
Size of Duct
Piece (in)
Duct Piece
Size of Duct
Piece (in)
Equivalent
Length (ft)
Equivalent
Length (ft)
EQUIVALENT DUCT LENGTHS FOR COMMONLY USED TRANSITIONS
Table 4: Duct Lengths