Venting Requirements Calculator
for 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:

Enter the length of one side
of the building in feet
Enter the width of other side
of the building in feet
Choose the desired vent




vents required

Enter the total area of attic
in square feet


Choose the desired vent




vents required
OR

Application: One vent for exhaust per:
UV-8
45
 Sq Feet of Floor
UV-16
91
 "
UV-24
137
 "
UV-32
183
 "
UV-40
229
 "
UV-48
274
 Sq Feet of Floor
UV-56
321
 "
UV-64
366
 "
UV-72
412
 "