Instructions / Assembly

1.800.643.5596 • Lomanco, Inc. • lomanco.com
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Turbine vents should be located near the peak of the roof
on the rear slope, exposed to the wind from all directions.
When installing two, place each one ¼ of the total length of
the roof peak from each end of the house.
Example: On a 40' roof, each turbine vent should be 10'
from each end of the house.
Proper Spacing With Two
Turbine Vents Installed
1/4
1/4
Back of House
Turbine vents should be located near the peak of the roof on the
rear slope, exposed to the wind from all directions. When installing
three, one should be installed 1/6 of the total length of the roof
peak from each end of the house and one should be installed in
the center.
Example: On a 60' roof, the two outside turbine vents should be
10' from each end of the house – and the center one should be 30'
from either end of the house.
1/6 CENTER 1/6
Back of House
How To Locate and Space
IB-8 Turbine Vent
20450_1216
A Properly Ventilated Attic Must
Have Intake and Exhaust Vents
Front of
House
Stale, Moist Air Out
Back of House
Insulation
Make Sure
Insulation
Material Does
Not Block
intake Vents
Fresh
Air In
Intake
Sot
Ventilator
IMPORTANT Do not cover turbine vents in colder
months. Turbine vents will help remove damaging
moisture present in all attics. If this moisture is
not removed, it could condense and ruin your
insulation.
Proper Spacing With Three
Turbine Vents Installed
THREE
MUST
DO
Steps
to attic ventilation
Install all Exhaust Ventilation at the SAME
HEIGHT within a common attic area.
Installation of exhaust vents at more than one level on a
roof allows the upper exhaust vent to pull air in from
lower exhaust vents rather than from the intake vents.
Intake air must come from intake vents located near the
lower part of the attic space to properly ventilate the
total attic area and eliminate weather infiltration.
Install ONLY ONE TYPE of Exhaust Ventilation
within a common attic area.
Exhaust Vents pull air from the easiest intake source.
Vent types cannot be mixed. The use of different types of
exhaust vents could make one of the vents act as intake
for the other. Intake air must come from intake vents
located near the lower part of the attic space to properly
ventilate the total attic area and eliminate weather
infiltration.
Install a BALANCED SYSTEM of Intake and
Exhaust Ventilation.
50% Intake Ventilation - Intake vents located near the
lower part of the attic area are required to balance out
your ventilation system.
50% Exhaust Ventilation - Use a Lomanco Ventilation
Selector guide, the calculators at lomanco.com, or the
Lomanco Vent Selector App to determine the number of
vents needed to properly ventilate an attic to meet the
minimum code ventilation standard.
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