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Venting Requirements Calculator
for AVP Universal Vents
Based on the 1/300 Rule
(see Building Codes menu for more info)
To determine how many Universal Vents are required
to properly ventilate an attic space:
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OR
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Application: One vent for exhaust per:
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Vent
Diameter
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Sq. Feet
of Floor
1/150
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Sq. Feet
of Floor
1/300
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Net Free
Vent Area
in Sq. Inches
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Net Free
Vent Area
in Sq. Feet
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UV-8
|
22
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45
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11
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0.076
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UV-16
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45
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91
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22
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0.153
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UV-24
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68
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137
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33
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0.229
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UV-32
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91
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183
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44
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0.306
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UV-40
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114
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229
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55
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0.382
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UV-48
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137
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274
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66
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0.458
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UV-56
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160
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321
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77
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0.535
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UV-64
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183
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366
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88
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0.611
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UV-72
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206
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412
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99
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0.688
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