Example 1
6" Wall Cap
Duct Fitting
Equivalent
Length
5" to 6"
Transition
1
6" Straight
1
6" Elbow
5
6" Wall Cap
28
Installation Instructions
5" to 6" Transition
2 ft. of 6" Round
6" Elbow
4 ft. of 6" Round
6" Elbow
6 ft. of 6" Round
Number
Total
of Fittings
Equivalent
Length of
Fittings
1
1
2+4+6=12
12
2
10
1
28
Total
51
Example 2
" x 10" Transition
6" to 3
1
⁄
4
" x 10" Straight
10 ft. of 3
1
⁄
4
Duct Fitting
Equivalent
Length
5" to 6"
Transition
6" Straight
6" Elbow
6" to
" x 10"
3
1
⁄
4
Transition
" x 10"
3
1
⁄
4
Straight
" x 10"
3
1
⁄
4
Wall Cap
24
5" to 6" Transition
2 ft. of 6" Round
6" Elbow
4 ft. of 6" Round
6" Elbow
6 ft. of 6" Round
6" Elbow
4 ft. of 6" Round
" x 10" Wall Cap
3
1
⁄
4
Number
of Fittings
1
1
1
2+4+6+4=16
5
3
1
1
1
10
20
1
Total
Total
Equivalent
Length of
Fittings
1
16
15
1
10
20
63