VENTING REQUIREMENTS

Vent system must terminate to the outdoors.

Do not terminate the vent system into an attic or other enclosed area.

Do not use a 4” (10.2 cm) laundry-type wall cap.

Use a 3¼” x 10” (8.3 x 25.4 cm) rectangular metal vent. Rigid metal vent is recommended. Plastic or metal foil vent is not recommended.

The length of vent system and number of elbows should be kept to a minimum to provide efficient performance.

For the most efficient and quiet operation:

Roof Venting

B

A

C

Wall Venting

A

B

C

Use no more than three 90° elbows.

Make sure there is a minimum of 24” (61 cm) of straight

vent between the elbows if more than 1 elbow is used.

Do not install 2 elbows together.

Use clamps or duct tape to seal all joints in the

vent system.

A. 3¼” x 10” (8.3 x 25.4 cm) rectangular vent through the roof. (purchased separately)

B. Roof cap with damper (purchased separately)

C. 24” (61.0 cm) min. to 30” (76.2cm) above the cooking surface

A. 3¼” x 10” (8.3 x 25.4 cm) rectangular vent through the wall or out the top (purchased separately)

B. Wall cap with damper (purchased separately)

C. 24” (61.0 cm) min. to 30” (76.2cm) above the cooking surface

The vent system at exit must have a cold air damper.

Use caulking to seal exterior wall or roof opening

around the cap.

Best performances are reached with straight piping,

without elbows and using smooth pipe.

Maximum recomended vent system length: 35 ft (10.7m).

Cold Weather Installations

An additional back draft damper should be installed to minimize backward cold air flow and a thermal break should be installed to minimize conduction of outside tem- peratures as part of the vent system. The damper should be on the cold air side of the thermal break.

The break should be as close as possible to where the vent system enters the heated portion of the house.

Makeup Air

Local building codes may require the use of makeup air systems when using ventilation systems greater than specified CFM of air movement. The specified CFM varies from locale to locale. Consult your HVAC professional for specific requirements in your area.

Venting Methods

Vent system can terminate either through the roof or wall. Use 3¼” x 10” (8.3 x 25.4 cm) rectangular with a maximum vent length of 35 ft (10.7 m) or 7” (17.8 cm) round vent with a maximum length of 50 ft (15.2 m) for vent system.

NOTE

Flexible vent is not recommended. Flexible vent creates both back pressure and air turbulence that greatly reduce performance.

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.

7” (17.8 cm) Round Vent System

Vent Piece

90° elbow

5.0 ft

 

(1.5 m)

 

 

7” (17.8 cm) wall cap

0.0 ft

 

(0.0 m)

Example Vent System

 

7” (17.8 cm) round

 

 

Wall Cap

 

90° elbow

 

 

 

 

 

 

 

 

 

6 ft (1.8 m)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2 ft (0.6 m)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Maximum Recommended Length

 

= 50 ft (15.2 m)

1

- 90° elbow

 

= 5.0 ft (1.5 m)

8 ft (2.4 m) straight

 

= 8.0 ft (2.4 m)

1

- wall cap

 

= 0.0 ft (0.0 m)

Length of 7” (17.8 cm) system

 

= 13.0 ft (3.9 m)



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Frigidaire LI30KC/316902495 manual Venting Requirements, Cold Weather Installations, Makeup Air, Venting Methods

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