Whirlpool W10100920C 用户手册

Venting Requirements

Venting systems for Whirlpool dryers must meet the following 
requirements:

■

The capacity to handle 200 CFM of air for each dryer in the 
system.

■

A back pressure of -1.0" (-25 mm) water column to 

 

0.6" (15 mm) of water column when measured at the 
connection to the dryer. 

■

The minimum duct air velocity during normal operating 
conditions should be at least 1,100 FPM to keep lint moving 

 

in the air stream. (In a 4” diameter pipe, this requires at 

 

least 96 CFM.)

Back pressure should be measured with an empty dryer, a clean 
lint screen and with the dryer operating in the Air Only cycle 

 

(no heat). Use an inclined manometer, such as Dryer model 

 

102 (0"-2" [0 mm - 51 mm] range) or Dryer model 172 

 

(0"-1" [0 mm - 25 mm] range) to measure the back pressure. 

 

See the following illustration.

Single dryer venting systems are defined as systems that have 
only one dryer unit attached to a residential-type 4" (102 mm) 
diameter rigid metal vent system. For single dryer venting 
systems, see the Installation Instructions that came with your 
dryer to determine the allowable length and number of elbows for 
the venting system. 
Additional Elbows
In cases in which the Installation Instructions do not address the 
vent length for the specific number of elbows required for a 
particular application, the following calculations may be used. 
(The total vent system length includes all straight and curved 
portions of the vent system.):

■

For 90° elbows, reduce the allowable vent system length by 
10 ft (3.05 m). 

■

For 45° elbows, reduce the allowable vent system length by 
6 ft (1.83 m).

For example, if the Installation Instructions state that a dryer is 
allowed 40 ft (12.2 m) of total vent length with two 90° bends, and 
the installation requires three 90° bends, the total allowable vent 
length would be reduced by 10 ft (3.0 m) (from 40 ft [12.2 m] to 
30 ft [9.1 m]).

Dryer Airflow
The airflow of a dryer depends on the design of the exhaust vent. 
Each dryer model has a maximum rated vent length, shown in the 
product literature that is supplied with each model, or on the 
Whirlpool.com website. The exhaust airflow of any Whirlpool 
produced dryer at the maximum rated vent length is at least 

 

100 CFM. The maximum airflow is 200 CFM. This includes 
standard vent and long vent dryer models.
Codes Agency Approvals
All Whirlpool electric dryer models, including “long vent dryers,” 
that are sold in the United States and Canada are UL listed 
(reference UL2158 standard), and all Whirlpool gas dryer models 
are CSA listed (reference ANSI Z21.5.1 standard). These 
standards require testing at the maximum-rated exhaust vent 
conditions that are published in the product literature for each 
individual model. The designation for the UL or CSA listing can be 
found on or adjacent to the serial label on the product.
Dryer Closet Installations
Closets used for dryer installation must provide multiple openings 
to allow air to flow through the dryer and around the dryer to 
dissipate heat. Refer to the product literature for details of room 
venting requirements. Any dryer enclosure or room that does not 
have an inlet and outlet for an operating forced air HVAC system is 
considered a closet, and requires room venting as stated in the 
product literature. The room venting can be installed into the walls 
of the dryer enclosure, as well as the door, provided it will not be 
blocked after the dryer is installed. Refer to the product literature 
for minimum clearances between the product and the enclosure 
surfaces.

Certain electronic dryer models have airflow detection 
capabilities. (See specific model product literature for details). If 
the airflow in the dryer is extremely low, an “AF” code will be 
displayed on the control panel. For single dryer venting systems, 
this code means that you may have a blocked or partially blocked 
vent or that your overall vent system length is too long. To resolve 
this issue:

■

Check to see if the vent run from the dryer to the wall is 
crushed. Refer to the “Venting Requirements” section of 
the Use and Care Guide for more information.

■

Confirm that the vent run from the dryer to the wall is free 
of lint and debris.

■

Confirm that the exterior vent exhaust hood is free of lint 
and debris.

■

Confirm that your vent system falls within the 
recommended run length and number of elbows for the 
type of vent you are using. Refer to the “Plan Vent 
System” section of the Use and Care Guide for details.

■

Select a Timed Dry heated cycle, and restart the dryer.

■

If the message persists, have your entire home venting run 
cleaned.

For multi-dryer venting systems, the “AF” code means that your 
vent may be blocked or partially blocked or that the venting 
system is creating back pressure in excess of the maximum 
allowable 0.6" (15 mm) water column. In this case, the engineering 
firm that designed the system should be consulted.

Multiple dryer venting systems must be designed specifically for 
each application. 
NOTE: It is recommended that an architectural or HVAC 
engineering firm be consulted for designing the dryer venting 
system.
Connecting a number of dryers to a single vent system is 
common in coin-laundry stores and in many apartment buildings. 
Listed here are some requirements for examples of three different 
multiple dryer venting systems.