Whirlpool 3977631 Determining vent length, To determine maximum vent length, Exhaust Hood Type

INSTALLATION INSTRUCTIONS

Determining vent length

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.

			EXHAUST HOOD TYPE
No. of
90°
turns
					4"
		4"				21⁄2"
	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
	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

Exhaust hood

Flexible metal vent or rigid metal vent

Elbow

10