GE ZVC36, ZVC42, ZVC48 Duct Fittings, This Hood Must Use an 8″ Round Duct. It Can Transition to a

Advance Planning

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 foot 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.

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