Author Topic: Solution for Dryer and Bathroom Fan Vents  (Read 2367 times)

mphonic

  • Guest
Solution for Dryer and Bathroom Fan Vents
« on: August 21, 2014, 05:42:20 PM »
Briefly:
I have one exterior wall where both a dryer and bathroom fan vent to the outside. This wall faces an elevated train.

I have done some soundproofing already (Soundproof Windows, extra layer of 5/8" drywall with Green Glue), and this has led me to discover that the vents mentioned above allow a good deal of sound into the wall cavity, which also happens to have heat / ac vents.

I would greatly prefer to not tear open my walls (I've had a great deal of expenses and disruptions already), so I'm wondering if there are creative solutions other than insulating the pipes for these vents.

Two thoughts I had:
1) Add something to the exterior part of the vents that forces incoming sound to traverse a few turns but still allows air in and out as necessary. So, maybe more pipe or a larger enclosure that is open at an angle facing away from the elevated train.

2) Some kind of soundproofing for the heat / ac vents (not the ducts, as that would require opening the walls). I thought that there might be an existing product, but I couldn't find any. I also think that this would help but not as much as stopping the sound from entering in the first place (since the sound gets into the wall cavity, and even the double drywall + Green Glue can't do a whole lot about that).

I would love to hear some expert opinions on the matter.

Thanks.

Randy S

  • Senior Soundproofing Technical Specialist
  • Global Moderator
  • *****
  • Posts: 815
    • Super Soundproofing Co
Re: Solution for Dryer and Bathroom Fan Vents
« Reply #1 on: August 26, 2014, 10:14:08 PM »
this is the correct approach.

1) Add something to the exterior part of the vents that forces incoming sound to traverse a few turns but still allows air in and out as necessary. So, maybe more pipe or a larger enclosure that is open at an angle facing away from the elevated train.


google "baffle box" and view images and you will see boxes with series of turns to allow air to move and reduce noise.


Randy S.
Randy Sieg

Super Soundproofing Co
www.soundproofing.org
888-942-7723
Ph. 760-752-3030
Fax.760-752-3040

 

anything