GE ZV830 manual Duct Fittings, Flexible ducting, Do not use flexible plastic ducting

Installation Preparation

DUCT FITTINGS

This Hood Must Use an

8″ Round Duct. It Can

Transition to a

3-1/4″x 12″ Duct.

Use this chart to compute maximum permissible lengths for duct runs to outdoors.

NOTE: Do not exceed maximum permissible equivalent lengths!

Maximum duct length: 100 feet for range hoods.

Flexible ducting:

If flexible metal ducting is used, all the equivalent feet values in the table should be doubled.

The flexible metal duct should be straight and smooth and extended as much as possible.

DO NOT use flexible plastic ducting.

NOTE: Any home ventilation system, such as a ventilation hood, may interrupt the proper flow of combustion air and exhaust required by fireplaces, gas furnaces, gas water heaters and other naturally vented systems. To minimize the chance of interruption of such naturally vented systems, follow the heating equipment manufacturer’s guidelines and safety standards such as those published by NFPA and ASHRAE.

					Total
			Equivalent	Quantity	Equivalent
Duct Piece	Dimensions		Length*	Used	Length
	Round,		1 ft.
	straight		(per foot
			length)
	3-1/4″x 12″		1 ft.
	straight		(per foot
			length)
	90° elbow		17 ft.
	45° elbow		10 ft.
	3-1⁄4″x 12″
	90° elbow		43 ft.
	3-1/4″x 12″
	45° elbow		26 ft.
	3-1/4″x 12″
	90° flat elbow		102 ft.
	8″ round to
	3-1/4″x 12″ transition		2 ft.
	3-1/4″x 12″	to 8″
	round transition		5 ft.
	8″ round
	to 3-1/4″x 12″
	transition 90° elbow		6 ft.
	3-1/4″x 12″	to 8″
	round transition 90° elbow		13 ft.
	Round
	wall cap
	with damper		32 ft.
	3-1/4″x 12″	wall cap
	with damper		75 ft.
	Round
	roof cap		44 ft.

*Actual length of straight duct plus duct fitting

equivalent. Equivalent length of duct pieces are

based on actual tests conducted by GE Evaluation Total Duct Run Engineering and reflect requirements for good

venting performance with any ventilation hood.

5