Duraflo 60PRO130 - Duraflo Ventilation Calculator

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Ventilation Calculator
Ventilation requirements for your home
The included ventilation calculator is only a guide, please consult your local building code for specic ventilation requirements.
A home requires an equal amount of intake
(soffit) & exhaust (roof) ventilation.
Note: Roof pitches under 4/12 require double the amount of ventilation.
Use this chart to determine how many vents your attic requires.
Ventilation
Calculator
DESCRIPTION
NET FREE AREA
OF VENT
NUMBER OF VENTS NEEDED FOR
1000 sq. ft.
(93 sq. meters)
1500 sq. ft.
(139 sq. meters)
2000 sq. ft.
(186 sq. meters)
2500 sq. ft.
(232 sq. meters)
IMPERIAL METRIC OF ATTIC SPACE
3 TIER
WEATHERPRO
PROVENTILATOR
130
Sq. In.
839
Sq. cm
1 2 3 4
2 TIER
WEATHERPRO
PROVENTILATOR
95
Sq. In.
613
Sq. cm
2 3 4 5
1 TIER
WEATHERPRO
PROVENTILATOR
48
Sq. In.
310
Sq. cm
4 6 8 10
WEATHERPRO
TURBO
117
Sq. In.
755
Sq. cm
1 2 3 4
WEATHERPRO
SLANT BACK
50
Sq. In.
322
Sq. cm
5 8 10 12
WEATHERPRO
60PRO50
50
Sq. In.
322
Sq. cm
5 8 10 12
WEATHERPRO
60PRO75
75
Sq. In.
484
Sq. cm
4 5 7 8
WEATHERPRO
RIDGE VENTS
72
Sq. In.
465
Sq. cm
4 5 7 10