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re: Attic ventilation
Posted on 8/7/19 at 8:15 am to MarcusQuinn
Posted on 8/7/19 at 8:15 am to MarcusQuinn
quote:
Current residential code (2015 IRC) states the minimum attic ventilation requirements are 150/1.
There's an exception in there, 1/300 if using ridge vents, as they are more efficient than vents NOT places at the highest point of the attic space (hot air rises...)
1
Posted on 8/7/19 at 7:44 pm to shell01
I know. But I figured there was plenty of info to sort out without getting into exceptions and percentages. If it’s split high and low (40-50% high?) it can be 1/300. But if you have a continuous perforated soffit you end up with nearly 1/150 anyway to get the ratios to work.
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