Ventilation: What fans are used, prefab ventilation panels

[crycom]

I just finished building my vocal booth and I’m very pleased with it, thanks to all that information online, like here on this site. So thank you all very much who contribute to this community!

My only problem I haven’t addressed really yet, is the ventilation for fresh air. I have read a lot and understand it needs to have silencer boxes and there are a lot of plans for that online, thankfully. But the question where I couldn't really find a answer to, are which fans can be used. The most common recommendation are Inline-duct-fans, but they seem ether extremely loud or expensive and big.

So I looked around and what you find when you're searching for „ventilation vocal booth“ are this prefab ventilation panels (gretchken, dawbox, vocalbooth, demvox, whisperroom) and they seem to use „normal“ PC-like fans. I attached a file with some pics, so you all know what I’m writing about.

I found some posts and they say it works great, but that‘s all, no mention of what fans they are. Does anyone know what kind of fans they are using? And has someone experience with it for ventilation?

Thanks in advance, greetings from Germany

Marvin

[Soundman2020]

Hi. Please read the forum rules for posting (click here). You seem to be missing a couple of things!

That said, there's a lot wrong with some of those images that you found. For example, the first one shows flex duct tightly packed inside a wooden box, completely kinked and bent: That's just silly! Flex duct should only ever be used stretched out in s straight line, or gently curved following the manufacturers recommendations for minimum radius, and using suitable support saddles. The result from doing what that photo shows would be a disaster: a very noisy disaster, with insufficient air flow, causing the fans to over-speed and burn out way before their useful life.

The correct way to do silencers, is like this:

http://www.johnlsayers.com/phpBB2/viewt ... 0&start=45
http://www.johnlsayers.com/phpBB2/viewt ... 9&start=74
http://www.johnlsayers.com/phpBB2/viewt ... 42&start=5
http://www.johnlsayers.com/phpBB2/viewt ... 61&start=0
http://www.johnlsayers.com/phpBB2/viewt ... 5&start=98
http://www.johnlsayers.com/phpBB2/viewt ... &start=157
http://www.johnlsayers.com/phpBB2/viewt ... =2&t=13821
http://www.johnlsayers.com/phpBB2/viewt ... 8&start=44
http://www.johnlsayers.com/phpBB2/viewt ... 2&start=16

Those are examples of silencer boxes built by forum members.

For the fan itself, my clients seem to have had good success with the Fantech RVF units that are specifically designed for this application, such as this one:

Fantech-exterior-exhaust-fan.jpg

The RVF 4. 4XL, 6, or 6XL, work fine. For a vocal booth, you probably wont need more than the RVF4, unless the booth is very large! Get the variable speed controller as well, so you can slow it down to whatever rate you really need, as even the RVF-4 is a bit big for a booth, running at full speed



- Stuart -

[crycom]

Yeah, sorry... I shouldn't have posted the first pic, I know that's not the way to do it, thanks to your link-collection which I have already seen in other posts, but apparently that is a build after an existing plan you can purchase (dawbox), so I included it. But what I’m interested in, is the fans in this and other pre-builds, it’s impossibly to find anything on that…

Thank you for the recommendation, it's appreciated, I don't think this came up yet in my research. So it’s used as an exhaust and the intake is passive? Do you know if they have a different brand in Europe, Germany? Can't find them here...

I wasn’t so interested in this bathroom-style duct fans because of the look, I wanted something that's more plane to the wall. And when I read the power consume on it… It seems so unreasonable for a vocal booth, it's 2 x 1,4m (6.6 x 4.6ft), so it's not sweaty and I'm not gasping for air after a couple of minutes in it, I just need some air, I think. But perhaps I just want it to be true, using some 140mm Noctua PC fans looks so attractive on first glance... If someone knows what they are actually using, I just have to know, so that I can let it go and than, perhaps, realizing that is not the answer and simply use this Fantech RVF4 in the end.

And thank you Stuart for your time!

Marvin

Edit: Okay, I think I have to give more details, sorry, I should have done that in the first post... So, it's an apartment, putting something on the outside of the building is not an option. It's a room in room solution. From what I could read, this thing is really loud. Not sure if I want that in the room...