DIY Home Improvement, Remodeling & Repair Forum > Appliances > HVAC > Spliting duct work a bad idea?

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Old 05-19-2011, 02:11 PM  
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Default Spliting duct work a bad idea?

I am trying to get some extra head room in my basement. Currently I have 8''x10'' duct running through the middle of my basement. I would like to split it into two 3.25''x10'' ducts runing side by side and then feed even number of registers from each section. Is it ok to do it? the cross sectional area would almost be the same so the amount of air flow should be similar to the original but I would gain more than 4'' in height of the basement.

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Old 05-19-2011, 05:55 PM  
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You will be losing 16 sq in. A sheet metal shop could make anything like 4x20 and make suggestions on what will work better.
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