Dacor DHI482 ユーザーズマニュアル

To reduce the risk of fire and to properly exhaust

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air, be sure to duct air outside the house or building.

Do not vent exhaust air into spaces within walls or

ceilings or into attics, crawl spaces or garages.
Tape all duct joints securely

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to prevent combustion

by-products, smoke or odors from entering the home.

Doing so will also improve system efficiency.
Do not exhaust more than one

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vent into a single duct.

Use only

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duct work constructed of materials deemed

acceptable by state, municipal and local codes.
Range hoods may interrupt the proper flow of

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smoke and combustion gases from furnaces, gas

water heaters and fireplaces. To avoid drawing

lethal gases into the home, follow the manufactures

recommendation for these devices and consult NFPA

and ASHRAE recommendations.
DO NOT

install an additional in-line or external

blower to increase the length of the duct run. Even

small differences between blower air flow rates can

greatly reduce the air draw by the hood.

All duct work materials (including screws and duct tape)

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must be purchased separately by the customer. When

planning new duct work, always look for the shortest,

most direct route to the outside.
The hood exhaust connects to an 8-inch round duct.

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You can increase the duct size over the duct run if

desired. To prevent a back draft, never decrease the

duct size over the run.
Do not rely on duct tape alone to seal duct joints.

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Fasten all connections with sheet metal screws and

tape all joints with duct tape. Use sheet metal screws

as require to support the duct weight.
To prevent back-drafts, a damper at the duct outlet may

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also be required.
Make sure duct work does not interfere with floor joists

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or wall studs.

The maximum straight duct length for the hood is 100

feet. For each elbow and transition added to the duct

work, a certain number of feet must be subtracted from

the maximum straight length to compensate for wind

resistance. To determine the length the duct work cannot

exceed, subtract all of the equivalent lengths of the elbows

and transitions listed below from 100 feet.

90° elbow (8” Dia.)

7 feet

45° elbow (8” Dia.)

3 feet

3 1/4” x 10” to 8” round

4 foot

Wall cap with damper

30 feet

Roof cap

30 feet

Wherever possible, reduce the number of transitions

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and turns to as few sharp angles as possible. Two

staggered 45° angles are better than one 90°.
Keep turns as far away from the hood exhaust as

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possible, with as much space between each bend as

possible.
For best performance, use round duct instead of

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rectangular, especially when elbows are required.
If multiple elbows are used, try to keep a minimum of

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24” (61 cm) of straight duct between them.
Avoid “S” or “back to back” configurations of adjacent

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elbows.
In regions where the weather gets extremely cold,

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thermal breaks, such as a short section of non-metallic

duct, should be used to avoid indoor heat loss. The

break should be located as close to the pass through

point to the outside as possible.
Do not use flexible metal duct.

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Do not

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use duct work that is smaller in cross-sectional

area than the recommended size duct (8” round).

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