Frigidaire FHWC3025, Installation, Use & Care

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:

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.

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.

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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.

” (1.8 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

A

B

C

A

B

C

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

Roof Venting  

Wall Venting

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)

2 ft (0.6 m)

7” (17.8 cm) round

90° elbow

6 ft (1.8 m)

Wall Cap 

VENTING REQUIREMENTS