Jack Audio/Visual - Construction And Design Process

[vakis]

Here's an update. The soffits have been finally fixed in place. The soffit "ceiling" was a bit nerve breaking, but it turned nice and solid in the end. Also the windows have been placed along with the neoprene seal.

The windows have 2 "steps" of neoprene. The first one i can't see from the other side if it's a tight fit.
The second step, I can see from outside, and there are a few spots that aren't quite as airtight as they should be.
So this will possibly be fixed with an extra layer of neoprene at those specific spots.

The windows have to be sealed with a lot of force, for the neoprene to be compressed.
And thats a bit annoying but anyways... all for the shrine of air-tightness:D

[vakis]

Heya:)

The moisture barrier that I picked just arrived today. It's called Barrier Sheet FR.

It's not sold as a moisture-vapor barrier but as a barrier to scren off areas in construction.
Yet it's waterproof and fire retardant which is what I was looking for.
This was as close to a moisture barrier I could find that was fire retardant.

They are a UK based company that specialises in protection of structures in construction environments.

They also have fire retardant Tape but suggested I used their cloth tape which is stronger adhesively.
Got both so that I can test them. The tape is just going to go ontop of stapled joints so we'll see...

Here's what they say on their site: http://www.protection.co.uk/products/12/

Available sizes: 4m x 25m
* Flame retardant - approved to LPS 1207 standard
* Produced by ISO 9001 manufacturer
* Extremely durable
* Reinforced for uniform strength
* Puncture and tear resistant
* Waterproof and slip resistant
* Versatile and easy to lay
* Can be custom printed
* Suitable for indoor and outdoor applications

Protec heavy duty barrier sheet is a high tensile flame retardant polyethylene sheet. Barrier sheeting combines effective vapour barrier qualities with excellent strength and a smooth surface that is resistant to abrasion and environmental stress.

Polyethylene barrier sheets can be used as a temporary seal for screening areas and as protective sheeting for a variety of surfaces. Available in large format rolls, barrier sheeting covers large areas quickly and is suitable for use on most floors and walls.

Protec heavy duty barrier sheets will last for the duration of a construction project and can be re-used many times.

[vakis]

And here's the Air-Conditioner I will be using.

It's one of the top air conditioners of Daikin and it's called:
"Ururu Sarara"

I've searched this specific model locally and it seems to be placed a lot in hospitals, recording studios etc.
Basically anywhere where quality of air is needed.

The most importand feature though for me is that They also supply Fresh air.

This is their website describing this feature: http://www.daikin.com/global_ac/product ... ure03.html

They can supply 24 cubic meters/hour at medium setting & 32 cubic meters/hour at high setting.
From what I've read an average male person breathes 0.360 cubic meters/hour.

So this seems more than enough for a room of 5x3.3x2.25 that will at most have 4-5 people simultaneously?

I'd like to hear to your opinions on the subject if you have any.

Thanks!

[Soundman2020]

So this seems more than enough for a room of 5x3.3x2.25 that will at most have 4-5 people simultaneously?

Did you do the calculations outlined in Rod's book?

[vakis]

Hey Stuart

Are you talking about the way to calculate how much Btu is needed?

[TomVan]

Vakis,
This is a very intersting find.
Thanks for the info

Have you thought about sound traveling one way or the other through the fresh air pipe?

The flow rate is more than adequate.
Its amazing how many times my doors get opened and closed in an hours time anyways.
Smoke break, bathroom break and listening break.
And one could argue the fact my first studio for ten years didn't have fresh air. It did get a little smelly at times
However I am very happy to have fresh air now
I installed one and a half times the needed fresh air for my space. Biggest problem is.... When its cold here my heating bill will start to climb because the amount of fresh (cold) air being piped in.
And reverse that in the summer
Peace
Tom

[vakis]

Hey Tom!

I Did not think that fresh air will affect the temperature as well. Good to know.
The Fresh air pipe isn't that big basically, the pipes seem the same as any other split unit's.
And the fan is placed outsite in the compressor.. So supposedly as they say on their site, there is no noise because of this..

On the subject of sound leakage I must admit that I did not think it through beforehand.

My solution to this is depicted in the picture below.
I'll basically construct the 90 degree ducts I've been seeing constantly on this forum.
And make four of these. 2 For the outside construction, and 2 for the internal (room in a room) construction.
Of course the internal ones are very limiting due to space.

Don't know if the unit is able to operate this way though cause of the small size of the ducts. I'll ask the person that installs them when he manages to come.

If John is watching this I'd really like to hear his opinion on this.


Vakis

[Soundman2020]

If the ducts are that small, then the velocity of the air moving through them must be very, very high. This is a bad idea. It is exactly the opposite of what you want in a studio. Fast-moving air generates noise. Rather, you want a large volume of air moving very slowly, not a small volume of air moving very fast.

I looked at the website for that unit, and could not find anything at all about the supposed fresh air ducts. Are you CERTAIN that the unit actually does pipe in fresh air and pipe out stale air? I can't see you being able to get much airflow through such tiny ducts. You might want to take a close look at that, in person, before you lay out any money on that unit.


- Stuart -

[TomVan]

Vakis,
Please let us know what the installer has to say
And I agree with a silencer.

Stuart,
See if this page gets you the answer
http://www.daikin.com/global_ac/product ... ure03.html

Peace
Tom

[vakis]

I have a friend that has the same model which I'm going to ask.
He has his models disconnected though for another 3 weeks due to construction work.
Perhaps I'll wait a little to verify it for myself.

Also I'm going to go to the Daikin representative and ask about this.

I'll let you know.
Cheers,

Vakis

[vakis]

Hey,
I've went to the representative today to test the fresh air option on the air conditioner.

The noise with the fresh air option On, is not that loud. You can hear it for sure, but it's very minimal. At least for my taste.
So I'm ok with that.

The problem now is that, the guy there said that it only brings fresh air in, It does not remove the stale air out.
Of course it cleans the air simultaneously while it's bringing fresh air if you want, but I'm worried about Co2 concentration?

Not my strong point, so are there any opinions on this?

[vakis]

I'm currently researching the possibility of using a normal ventilation system + the daikins.

The only problem is, that I did not design the construction based on ventilation construction.
So I have no idea where to put the ducts so I'm examining 2 possibilities.

-I have some space behind the CRoom and LRoom. I can pass relatively thin ducts (4 inches - 10 cm, maby flex ducts) from there and then go into the Rooms, So that there is not a direct hole through both the exterior shell and interior shell.

-The other option is simply going straight through both shells (outter construction and room in a room construction.

Also do you think that I can I put the fan on the outside silencer due to space restriction?

Cheers!

[vakis]

Today I went to a Company that offer ventilation services and products called Arimec.

They calculated about 10-12 changes of air each hour.

They suggested this model: http://www.aeroflo.com/ecatalog.php?fan ... +Duct+Fans
The AXC 150B model.
They said 2 fans are needed for each room, 1 to provide air and one to take air outside.
They said though that due to the 2 silencers for each duct I might need a fan that produces more CFM.

Are the CFM of this fan enough for my space? The CRoom is 4.70m x 3.20m x 2.25m, and the LRoom is 5.20m x 3.30m x 2.25m.

Also for this fan the duct that is needed is 15cm/6 inches in diameter.
So I can't follow the original plan to pass the duct through the walls in a "zig zag" fashion(not going directly straight through both structures). The space between my walls is minimal, 11cm between the live room drywall and brick wall, And 18cm between the Control Room drywall and Brickwall. Posted 2 pics just for illustration of this.

So now I'm thinking of passing the ducts directly through both structures and use 2 silencers, one for each wall.
And I'm wondering how much this will affect the soundproofing. But I think I don't have much of a choice...
Maby If I make more corners in the silencers this will be minimized?

[vakis]

no opinions?...

[TomVan]

HEy Vakis
Check out this thread. You can hide the silencer inside the room.
Honestly one should do the trick just fine
http://www.johnlsayers.com/phpBB2/viewt ... t+silencer

Peace
Tom