Calculating Vent System Length

Calculating Vent System Length

To calculate the length of the system you need, add the equivalent feet (meters) for each vent piece used in the system.

Maximum equivalent vent length is 35 feet (10.7 meters).

 

Vent piece

6" (15.2 cm) round

 

 

45° elbow

2.5 feet

 

 

 

 

 

(0.8 m)

 

 

 

 

90° elbow

5.0 feet

 

 

 

 

 

(1.5 m)

 

 

 

90° elbow

6 ft. (1.8 m)

 

 

wall cap

 

 

 

 

 

 

 

 

 

Example vent

 

 

 

 

 

system

2 ft.

1 — 90° elbow

=

5 ft.

(1.5 m)

(0.6 m)

8 ft. (2.4 m) straight

=

8 ft.

(2.4 m)

 

 

1 — wall cap

=

0 ft.

(0 m)

 

system length

=

13 ft.

(3.9 m)

NOTE: Flexible vent is not recommended. Flexible vent creates back pressure and air turbulence that gently reduce performance.

Electrical Requirements

Electrical RequirementsWARNING

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

IMPORTANT: The hood must be electrically grounded in accordance with local codes and ordinances, or in the absence of local codes, with the National Electrical Code, ANSI/NFPA 70, latest edition, or Canadian Electrical Code, CSA C22.1.

If codes permit and a separate ground wire is used, it is recommended that a qualified electrical installer determine that the ground path is adequate.

A copy of the above code standards can be obtained from:

National Fire Protection Association

One Batterymarch Park, Quincy, MA 02269

CSA International

8501 East Pleasant Valley Road

Cleveland, Ohio 44131-5575

A 120-volt, 60-Hz, AC-only, 15-amp, fused electrical circuit is required. A time-delay fuse or circuit breaker is also recommended. It is recommended that a separate circuit serving only this hood be provided.

Do not ground to a gas pipe.

Check with a qualified electrician if you are not sure range hood is properly grounded.

Do not have a fuse in the neutral or ground circuit.

The range hood must be connected with copper wire only.

The range hood should be connected directly to the fused disconnect (or circuit breaker) box through flexible armored or nonmetallic sheathed copper cable.

A UL- or CSA-listed strain relief must be provided at each end of the power supply cable. Wire sizes (copper wire only) and connections must conform with the rating of the appliance as specified on the model/serial rating plate.

Wire sizes must conform to the requirements of the National Electrical Code, ANSI/NFPA 70, latest edition, or CSA Standards C22.1-94, Canadian Electrical Code, Part 1 and C22.2 No. 0-M91, latest edition, and all local codes and ordinances.

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KitchenAid 9760425A Electrical Requirements, Calculating Vent System Length, Replace all parts and panels before operating