Should I try to sound proof the metal register boxes of my HVAC system - AVS Forum
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Old 12-05-2012, 03:59 PM - Thread Starter
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I am in the process of adding a basement with a dedicated theater room. right now during the construction phase my metal register boxes for the upstairs HVAC are exposed. Sound is passed through these metal registers very easily. I am planning on using whisper clips, 2 layers of 5/8" drywall and green glue on the ceiling. Will this take care of all the sound or should I wrap the metal register boxes with MLV or any other product before I drywall the ceiling? I am ripping everything out and having a new HVAC system and new register boxes installed in the next couple of weeks so now is the time to do it if there is a benefit. Any help is appreciated!!!!

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This is my first post to a forum EVER!!!!

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Old 12-05-2012, 05:09 PM
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I've thrown some dynamat supreme on the boots in the past and I liked the result. I've also lined some with Linacoustic. if they are connected with round pipe substiting flex duct for the last few feet can often provide a benefit, And of course surrounding the ducts with insulation.
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Old 12-05-2012, 05:24 PM
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If you are into replacing the boots My home depot usually has some rectangular floor registers that are already lined with linacoustic. They call them insulated.
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Old 12-26-2012, 10:02 AM - Thread Starter
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BIGmouthinDC,

Thank you for the info. I appreciate it! I hope you had a Merry Christmas.
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