When installing roof ventilation in California, what is the standard net free ventilating area ratio required when both intake and exhaust vents are provided?
Correct Answer
C) 1:300 of the area of the space ventilated
Per CRC Section R806.2, when both intake and exhaust ventilation are provided in balanced amounts, the minimum net free ventilating area is 1:300 of the area being ventilated. If only exhaust or intake vents are used, the ratio increases to 1:150 to ensure adequate air circulation.
Why This Is the Correct Answer
Per CRC Section R806.2, when both intake and exhaust ventilation are provided in balanced amounts, the minimum net free ventilating area is 1:300 of the area being ventilated. If only exhaust or intake vents are used, the ratio increases to 1:150 to ensure adequate air circulation.
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