Brochure

Broan Ventilation Fans—Attic

Push the heat out. Pull a fresh breeze through.

Too often, attic ventilation is

overlooked, not to mention ignored

as a place for energy savings. That’s

where Broan solutions make sense.

Consider this: air trapped in your

attic can easily reach 150˚ or more.

With Broan ventilation solutions, it’s

still a full 60˚ cooler in the attic on a

90˚ day. That’s why attic ventilation

is critical to making any home more

comfortable while lowering energy

costs. Air-conditioners can run less and

won’t have to work as hard. Humid,

stagnant air can be removed, drawing

fresh dry air across the surfaces. Your

attic can be drier and cooler—the

perfect tools to help fight potential

moisture damage.

How to calculate 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 determined by

measuring the height of the attic (in feet) at a point

that is 12 feet from where the roof rafters and the

attic floor joists meet.

Example: 8/12 Roof Pitch

A roof that is 8 feet high at a point 12 feet

from where the roof rafters meet the

ceiling joists has a pitch of 8/12.

Attic floor joist

Roof rafters

12'

Determining the CFM* requirements for your attic

Gable Mount Roof Mount

Model Model Model Model Model Model Model

Roof Pitch 353 35316 349BR 350BR/350BK 355BR/355BK 356BR/356BK 358

900/1140 CFM** 1160/1600CFM** 1000 CFM 1050 CFM 1200 CFM 1600 CFM 1200 CFM

8/12

Light 1285/1630 sq. ft. 1658/2285 sq. ft. 1490 sq. ft. 1500 sq. ft. 1715 sq. ft. 2285 sq. ft. 1715 sq. ft.

or Less