Equivalent Duct Lengths For Commonly Used Transitions - Thermador PROFESSIONAL HPCN36NS Installation Manual

Equivalent Duct Lengths for Commonly Used Transitions

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