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Old 08-11-2012, 08:01 AM   #1
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return flow calculations?

If a 25x25 return yields 1000-1300.
What does a 12x12 yield if it's delivered through a 6 inch or 8 inch duct?
Can 6 inch return 300 cfm?
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Old 08-11-2012, 10:37 AM   #2
An old Tradesmen
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return flow calculations?

Originally Posted by ang1dust View Post
Can 6 inch return 300 cfm?

If it did, you wouldn't be able to hear anything else in that area but the air rushing through the 6" duct.
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Old 08-11-2012, 09:42 PM   #3
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return flow calculations?

Using your base example of 1000 cfm for a 25 X 25, a 6 " duct would provide about 44.7 cfm. NO.
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