Zephyr AKI 124S Use, Care And Installation Manual page 6

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Duct pieces Equivalent number Duct pieces Equivalent number
length x used Total ....
= length x used = Total
3 1/4" x 10" 1Ft x( ) = Ft
_ i Rect,
i straight
i 7" Round, i 1 Ft x ( ) = i Ft
(_ i straight
7" Round, I Ft x( ) = Ft
straight
71/4"x10" 15Ft x( ) = Ft
Rect 90 o
elbow
31/4" x 10" 9Ft x( ) = Ft
71/4" x 10" 24Ft ×( )= Ft
Rect 900
flat elbow
3 1/4" x 10" 30Ft x( ) = Ft
....
wall cap
with damper
_ 31/4"x10" 5Ft x( ) = Ft
Rect to
6" round
transkion
3 1/4" x 10" 15Ft x( ) = Ft
i Rect to
i 6" round
i transition
i 90 o elbow
if/_ i 6"Round, i 15Ft_ ×1 / = i Ft,
[ 900 elbow l
6" Round 30 Ft x ( ) = Ft
_ _wa,, cop
with damper
= Ft
6" Round, 30 Ft x ( )
roof cap
i transkion
i6"roundto i16Ft x( ) = Ft
i31/4"x10"
i rect
i transition
i 90 o elbow
7" Round, 15Ft x( ) = Ftl
90 o elbow
T' Round, 70 Ft x ( ) = Ft
roof cap
7
Subtotal column 1 =
Maximum Duct Length: For satisfactory air movement,
the total duct length of a 3 1/4" x 10" rectangular, 6" or 7"
7" round to 8 Ft x ( ) = Ft
[_ 3 1/4" x 10"
rect
transition
T'roundto i 1SFt x( ) = Ft
3 1/4" x 10"
rect
transition
90 o elbow
i 6" Round, i 9 Ft. x( ) = Ft Subtotal column 2 = Ft
450 elbow
Subtotal column 1 = Ft
Ft Total ductwork = Ft