DIY Home Improvement, Remodeling & Repair Forum > Appliances > HVAC > Why ducts are hanged with space between joists?




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Old 05-20-2011, 11:18 PM  
python01
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Default Why ducts are hanged with space between joists?

I wonder why there is always space left between duct and joists in the basement?
Would it be ok to mount duct right against the joists if it is being replaced? Or is it due to vibration from the furnace or some other reason?



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Old 05-21-2011, 06:09 PM  
paul52446m
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Originally Posted by python01 View Post
I wonder why there is always space left between duct and joists in the basement?
Would it be ok to mount duct right against the joists if it is being replaced? Or is it due to vibration from the furnace or some other reason?
You are right, it is because of vibration. People walking across the floor will make the ducts rattle , so never put the ducts up to the joist. Paul
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Old 05-22-2011, 09:36 AM  
joecaption
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And any vibration in the blower system in the air exchanger will be applified like a speaker box.

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