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Determining vent length, Installation instructions – Whirlpool 3977631 User Manual

Page 10

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4"

Determining vent length

INSTALLATION INSTRUCTIONS

No. of

90°

turns

Rigid Metal Vent 4 in dia
Maximum length

0

36 ft

36 ft

26 ft

1

26 ft

26 ft

16 ft

2

16 ft

16 ft

6 ft

EXHAUST HOOD TYPE

4"

2

1

2

"

Flexible Metal Vent 4 in dia
Maximum length

0

28 ft

28 ft

22 ft

1

18 ft

18 ft

12 ft

2

8 ft

8 ft

2 ft

NOTE: Check periodically to ensure that
the outside exhaust hood is not blocked.

The maximum length of the exhaust system
depends upon:

The type of vent (rigid or flexible metal).

The number of elbows (90° turns) used.

To determine maximum vent length:
1.
See the Exhaust Hood Type chart that

matches your type hood for the maximum
vent lengths you can use.

Do not use vent runs longer than
specified in Exhaust Hood Type chart.

Exhaust systems longer than specified will:

Shorten the life of the dryer.

Reduce performance, resulting in
longer drying times and increased

energy usage.

2. Determine the number of elbows you will

need.

3. In the column listing the type of metal vent

you are using (rigid or flexible), find the

maximum length of metal vent on the
same line as the number of elbows.

10

Exhaust hood

Flexible metal vent or
rigid metal vent

Elbow

3977631 v12 c51 3/22/99 5:11 PM Page 10