Data Sheet

Roof-Mounted
Powered Attic
i Ventilators
An economical way to beat the heat.
Trapped attic air can easily reach 150° or
more. These units remove super-heated
attic air, making any home more
comfortable. Whether it's air conditioned
or not. In those homes that are, the air
conditioners run less and don't have to
work nearly as hard. And all Broan
Powered Attic Ventilators are as efficient
as they are dependable.
1
Gable-Mounted
Models 350, 355, 356, 358
• Durable off-white, fade-resistant PVC
dome can be painted to match roof color
(Models 350, 355, 356).
• Heavy gauge aluminum dome
(Model 358).
• Mounts easily between rafters template included for cutting roof
boards and shingles.
• Mesh screen keeps out birds and insects.
• 37/a" high splash guard helps keep
out rain.
• Heavy gauge metal flashing stands
up to nailing and tarring, regardless
of climate.
• Thermostat and motor accessible from
outside for easy servicing, if required.
• HVI certified air delivery @ 0.03"
static pressure.
Model 350 - 1050 CFM for attics
up to 1500 sq.ft.
Model 355/358 - 1200 CFM for attics
up to 1715 sq.ft.
Model 356 - 1600 CFM for attics up to
2285 sq. ft.
• To determine correct model for your attic
size, see page 32.
Model 353
• Quiet, high-performance operation for
inside-the-attic applications.
• Galvanized steel housing, ribbed for
added strength.
• Mounting brackets simplify installation.
• 1140 CFM for attics up to 1630 sq. ft.
Model 35316
• 1600 CFM for attics up to 2280 sq. ft.
• Other features same as Model 353.
Gable-Mounted Unit Accessory
Model 445
I
14" diameter steel blade specially
designed for maximum air movement.
• Operates automatically - adjustable
thermostat built-in.
• Thermally protected, permanently
lubricated motor.
USA
22
General Accessories
Utilize our static intake and exhaust vents to
ensure the efficient operation of your Broan
Powered Attic Ventilator. To determine the
number required for your specific
application, see page 32.
• Model 445 Aluminum Roof Vent;
15" x 16" base; 8" opening; 33/4" high;
Free area: 45 square inches (6 per carton).
• Model 446 Aluminum Eave Vent;
4" x 16"; Free area: 22.7 square inches (24
per carton).
• Model 447 Aluminum Eave Vent;
8" x 16"; Free area: 54.6 square inches (12
per carton).
Model 433 Automatic Shutter
• Allows more air movement than
conventional stationary attic louvers.
• Counter-balanced aluminum vanes open
automatically when ventilator is turned on,
close when fan stops.
• Flange fits flush against outside wall for
neat, smooth appearance.
• Reinforced for strength; provides
weathertight closure.
Choosing the right Broanfanfor you.
First decide what features you'd like. Then, use the table at right
to determine the necessary cubic feet per minute (CFM) required
for the size and type of room. Also consider sound levels. These
are measured by an industry standard called a "Sone." One Sone
roughly equals the sound the average refrigerator makes when
operating in a quiet kitchen. The higher the Sone rating, the
louder the fan. For example, a 4.0 Sone fan is twice as loud as a
2.0 Sone fan.
^d^^^m^ Broan fan units are tested and certified by the
Home Ventilating Institute. This is your assurance
~"srrrrib that each Broan fan has been tested by an
independent agency, and found to consistently deliver the air and
sound performance specified in this brochure.
POWERED ATTIC VENTILATOR
Attic Size
CFM*
RPM
Height
Dome Diameter
Gable Mount
Model 353 Model 35316
Up to
Up to
1630 sq.ft. 2285 sq. ft.
1140/900** 1600/1160
950
1420
—
—
—
—
HOME
V E N T 1 L ATI N G
R
0
C
M
M
WallS
Ceiling Fans
Bathroom
Example
Kitchen
Example
Rec Room, Utility Or
Laundry Room, or Basement
Example
L = Room Length
Roof Mount
Model 355/358
Up to
171 5 sq.ft.
1200
Model 350
Up to
1500 sq.ft.
1050
1000
E
r
1050
f'
233/ie"
23 3 /16"
N
D
INSTITUTE
A
T
1
0
N
S
How to Calculate
Required CFM
(Based on 8 (t. ceiling)
L x W x 1 . 1 =CFM
(10' x 10' x 1 . 1 = 110 CFM)
L x W x 2 = CFM
( 1 0 ' x 1 0 ' x 2 = 200CFM)
Air Changes/Hour
8
15
6
L x W x 0 . 8 = CFM
(1 2' x 20' x 0.8 = 200 CFM)
W = Room Width
SPECIFICATIONS
\
j
E
How to Figure the Pitch of Your Roof
PITCH is the angle of your roof, or the RISE
in feet for every 12 feet of RUN. Pitch is
figured by measuring the height of the attic
(in feet) at a point 12 feet from where the
roof rafters and the attic floor joists meet.
Model 356
Up to
2285 sq. ft.
1600
1500
8"
233/ie"
8/12
PITCH
HOW TO DETERMINE CFM REQUIREMENTS FOR YOUR ATTIC
Gable Mount
Roof Mount
Model
Model
Model
Model
Roof
353
35316
350
355/358
Pitch
900/1140 CFM" 1160/1600CFM** 1050 CFM 1200 CFM
8/12 Light 1285/1 630 sq.ft. 1 658/2285 sq .ft. 1500sq. ft. 1 7 1 5 s q . ft.
Roof
Attic
Attic
Attic
Attic
'
Less Dark 11 25/1 425 sq.ft. 1442/1 985 sq .ft. 1304sq. ft. 1495 sq. ft.
Attic
Roof
Attic
Attic
Attic
1549/21 35 sq .ft. 1399 sq. ft. 1600 sq. ft.
9/12 Light 1200/1 520 sq .ft.
Attic
Roof
Attic
Attic
Attic
Dark 045/1 325 sq. ft.
1347/1 855 sq .ft 1 2 1 9 sq. ft. 1390 sq. ft.
Roof
Attic
Attic
Attic
Attic
12/12 Light 675/855 sq. ft.
790 sq. ft. 900 sq. ft.
870/1 200 sq. ft.
Roof
Attic
Attic
Attic
Attic
Dark 590/750 sq. ft.
694 sq. ft. 790 sq. ft.
757/1 055 sq. ft.
Roof
Attic
Attic
Attic
Attic
15/12
420/530
sq.
ft.
Light
508
sq.
ft.
575
sq. ft.
ft.
559/770
sq.
/v^
Roof
Attic
Attic
Attic
Attic
Dark 375/475 sq. ft.
430 sq. ft. 505 sq. ft.
486/670 sq. ft
Roof
Attic
Attic
Attic
Attic
'Exhaust capacity HVI certified @ .03" static pressure.
**Higher CFM w/Broan Model 433 shutter. Lower CFM w/standard wood louver.
z^
Z_A\
W
H
0
L
E
H
0
U
S
V
2135 sq.
PITCH = RISE
ft.
Attic
1855sq. ft.
Attic
1200sq. ft.
Attic
1055sq. ft.
Attic
770 sq. ft.
Attic
670 sq. ft.
Attic
E
N
TESTED/CERTIFIED
T
CFM
Volts
Minimum Attic
Exhaust Required
Amps
Blade RPM
20" Direct Drive
• 2220
3300
120
4.5 sq. ft.
4.5
24" Direct Drive
2224
3600
120
5.0 sq. ft.
4.5
30" Direct Drive
2230
5100
120
7.0 sq. ft.
36" Belt Drive
2236
6850
120
t Maximum home square footage recommended for unit size.
9.0 sq. ft.
HVI certified air delivery @ 0.1"static pressure.
Broan Whole House Ventilators require adequate attic exhaust to operate
efficiently. The following formula will help you determine how much
additional attic exhaust area is needed.
1.Multiply the square footage of the house by 3 to determine the cubic
feet per minute (CFM) of air flow needed for the house.
Example: 1750 sq. ft. x 3 = 5250 CFM.
/RUN
The Home Ventilating Institute (HVI)
recommends 1 sq. ft. of open air inlet
per 300 CFM of fan capacity. The best
location for these air intake vents is under
the eaves with direct access to the attic.
Vents for gable installations should be
placed at the end of the house opposite
the installed ventilator. Failure to provide
these intakes could cause natural-draft
gas appliances to backdraft.
Model
No.
Description
32
E
Model
356
1600 CFM I
2285 sq. ft.
Attic
1985sq. ft.
Attic
I
L
A
T
0
R
S
Blades
Ceiling
Opening
Maximum Sq.
Ft. of Home,
1060/650
3
23'/2"x23'/2"
1100
825/525
4
23 '/2" x 26"
1200
5.0
700/400
4
30" x 32"
1700
5.5
440
4
431/2" x 32"
2300
2.Divide the CFM by 750 to determine the amount of attic exhaust area
required. Example: 5250 CFM -f 750 = 7 sq. ft. of attic exhaust required.
3.Take the amount of attic exhaust required and subtract half of the existing
amount of attic exhaust area. This will determine the additional amount of
attic exhaust needed.
Example: 7 sq. ft. (required) - 4 sq. ft. (existing)/2 = 5 sq. ft. of additional
attic exhaust needed.