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What methods can be used in reducing HVAC machine noise, in a congested low false ceiling?

Machine Design Machine Learning Sound Design Construction Methods Construction
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Question added by Marwa Ahmed , Senior Project Manager , Aurecon
Date Posted: 2017/04/18
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sanjay Kumar
by sanjay Kumar , Project Manager MEP , Marine Airconditioning & refrigeration Co.

If it is a machine of more than 1200 CFM use sound Attenuator to achieve required NC level. If it is Lower Than 1000 CFM, design a ducting so that velocity will be low and even grill & diffuser size select higher side.

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