John Sayers' Recording Studio Design Forum Archive

Gregwor wrote:

Looking at that catalogue image. Doesn't that say CFM per ft.? Unless I'm reading that wrong isn't that: 200CFM over a 48" diffuser is the same as 50 CFM per ft or between 7 and 13 NC?

YES!!!!!

I decided to use these linear slot units like 6 months ago and I just re-visited them. I was so surprised that I had picked them seeing that they'd have 40 NC. I can't believe I missed that. Thanks!

Greg

Ha! Happy to help .

Hello everyone. I have located a supplier here that can get some duct liner and wanted to touch base with you all to see if this is the correct thing. Here is a link to it

https://www.isover-marches-techniques.f ... ab-v2-flex

It looks like the right thing and the sales person assured me that it is for lining the interiors of aluminium ducts

then my next question is, how on earth do you attach this to the inside of the silencers? Do you glue it on? The sales person said that you use a contact glue but I was worried about listening to him because I know what fiberglass is like and don't want it to break. Please help with this!

cheerss

I don't speak French, but from what Google Translate says, it looks to be the right stuff.

then my next question is, how on earth do you attach this to the inside of the silencers? Do you glue it on?

Yes. But use a glue that doesn't contain anything nasty or smelly, and ventilate the box well before you install it. Use whatever the manufacturer recommends.

- Stuart -

Soundman2020 wrote:I don't speak French, but from what Google Translate says, it looks to be the right stuff.

hehe, I only meant for you to see the image but thanks for inputing the text to check what it said, that was very thoughtful

do you need some kind of tape for the corners/edges to cover the fiberglass or am I overthinking this? The way I see it in my mind, when you glue the fiberglass to the inside of the box, you might have to use several pieces and won't there be some areas where the edges are exposed that you will want to tape up to prevent the fibers from escaping?

It's not necessary to tape the edges. You can if you want, but there's not really a need for that. Try to fold and wrap the insulation around the box interior so there are as few edges as possible. There will be several, of course, but by planning carefully and working carefully, you can minimize that.


- Stuart -

Soundman2020 wrote:It's not necessary to tape the edges. You can if you want, but there's not really a need for that. Try to fold and wrap the insulation around the box interior so there are as few edges as possible. There will be several, of course, but by planning carefully and working carefully, you can minimize that.


- Stuart -

ok cool thanks

Waka wrote:

buttermuffin wrote:Your comment about the plasterboard housing the register got me thinking. So is it not possible to attach the register/grille to the duct itself? Does it have to be attached to the plasterboard? I suppose I could have a piece of drywall just to house the register in that location

I haven't had any experience with duct board, but for it to house the register it would have to be able to take screws.

It can't take screws but it takes an aluminium frame which houses the register.