Zephyr AK7848ASX, AK7842ASX, AK7836ASX manual Installation Ducting Calculation Sheet

Duct pieces	Equivalent number				Total
	length x used		=
3-1/ 4” x 10”	1 Ft.	x (	)	=	Ft.
Rect.,
straight
6” Round,	1 Ft.	x (	)	=	Ft.
straight
7”-10” Round,	1 Ft.	x (	)	=	Ft.
straight
3-1/ 4” x 10”	15 Ft.	x (	)	=	Ft.
Rect.900
elbow
3-1/ 4” x 10”	9 Ft.	x (	)	=	Ft.
Rect.450
elbow
3-1/ 4” x 10”	24 Ft.	x (	)	=	Ft.
Rect.900
flat elbow
3-1/ 4” x 10”	30 Ft.	x (	)	=	Ft.
Rect.
wall cap
with damper
3-1/ 4” x 10”	5 Ft.	x (	)	=	Ft.
Rect.to
6” round
transition
3-1/ 4” x 10”	20 Ft.	x (	)	=	Ft.
Rect.to
6” round
transition
900 elbow
6” Round,	15 Ft.	x (	)	=	Ft.
900 elbow
6” Round,	9 Ft.	x (	)	=	Ft.
450 elbow
	Subtotal column 1 =				Ft.

Duct pieces	Equivalent number				Total
	length x used		=
6” Round	30 Ft.	x (	)	=	Ft.
wall cap
with damper
6” Round,	30 Ft.	x (	)	=	Ft.
roof cap
6” round to	1 Ft.	x (	)	=	Ft.
3-1/ 4” x 10”
rect.
transition
6” round to	16 Ft.	x (	)	=	Ft.
3-1/ 4” x 10”
rect.
transition
900 elbow
7” - 10”	15 Ft.	x (	)	=	Ft.
Round,
900 elbow
7” - 10”	9 Ft.	x (	)	=	Ft.
Round,
450 elbow
7” - 10”	30 Ft.	x (	)	=	Ft.
Round
wall cap
with damper
7” - 10”	30 Ft.	x (	)	=	Ft.
Round,
roof cap
7” round to	8 Ft.	x (	)	=	Ft.

31/ 4” x 10” rect. transition

7” round to	23 Ft.	x (	) =	Ft.
3-1/ 4” x 10”
rect.
transition
900 elbow
Subtotal column 2 =				Ft.
Subtotal column 1 =
				Ft.
Total ductwork			=
				Ft.

Installation – Ducting Calculation Sheet

Maximum Duct Length: For satisfactory air movement, the total duct length should not exceed 100 equivalent feet.

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