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PREPARE THE INSTALLATION LOCATION

PREPARE THE INSTALLATION LOCATION

ROOFINSTALLATIONS

 

WALLINSTALLATIONS

 

 

 

1.Locate the blower on the rear slope of the roof. Place it in a location to minimize duct run. The location should be free of obstacles (T.V. leads, electrical lines, etc.). If the blower top is level with the roof peak, it will not be seen from the street. Keep this approximate location in mind as you work from within the attic.

1.Choose a position on the outside wall. Make sure that no wall studs, pipes or wires run through the opening area.

2.From inside, mark and drill a guide hole centered between wall studs.

2.Mark and drill a guide hole centered between roof rafters.

Ø

18"

Ø

1¼" dia. hole

1211/16"

REMOVE SHINGLES

1"

RafterRoof

RoofRafter

20½"

 

 

Guide hole

 

 

(centered

11" dia.

 

between rafters)

hole

 

 

115

 

 

912 //168"

 

21"18"

3.From the outside, use the guide hole as a starting point to lay out the installation:

A.Use a T-square to measure 125/8" to the left of the guide hole, then up 1211/16" to locate the top-left corner of the layout.

B.Starting from the top-left corner, mark the rectangular cutout (21" W x 20½" H) and remove only the shingles in this area.

C.Mark an 11" diameter hole centered on the guide hole. Cut this hole through the roof board(s).

D.Mark and cut a 1¼" diameter hole through the roof board(s) where shown.

29-1/2"

2"

7"

25"2"

Ø

Ø

 

 

 

 

 

20"17"

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1¼" dia. hole

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Guide hole

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3"

 

1411/16"

 

(centered between studs)

 

29½"

Wall Stud

11" dia.

Stud

REMOVE

Wall

hole

SIDING

 

 

 

1114135//168""

25"2"

3.From the outside, use the guide hole as a starting point to lay out the installation:

A.Use a T-square to measure 145/8" to the left of the guide hole, then up 1411/16" to locate the top-left corner of the layout.

B.Starting from the top-left corner, mark the rectan- gular cutout (25" W x 29½" H) and remove only the siding in this area.

C.Mark an 11" diameter hole centered on the guide hole. Cut this hole through the roof board(s).

D.Mark and cut a 1¼" diameter hole through the roof board(s) where shown.

4.For flat roof installations, build a curb that will mount the blower at a minimum pitch of 2/12. Discharge end of the blower should be pointed away from prevailing winds.

Broan at ::rangehoods.com

2

is a division of kitchen::accessories