[labnetwork] Combined or separate exhaust?

[Nathanael Sieb]

Hi Travis,

At 4D LABS our facility is tied into the main house exhaust system with 
stainless ducting.  Tool exhausts, wetbenches, and gas cabinets all go 
into this stream.  We have local scrubbers for extra hazardous 
materials.  The exhaust system on the roof has 3 strobic fans and we 
would likely be ok with 2/3 running.

One tip I can offer is to always plan generously for future expansion.  
It is very expensive and difficult to add exhaust capacity after the 
main build.

Thanks,

Nathanael

On 2025-02-24 6:23 p.m., Massey, Travis wrote:
>
> Hi all,
>
> LLNL is planning a significant cleanroom expansion, and the question 
> arose whether we /need/ separate exhaust for hoods and tools/gases, or 
> if they can be combined into a single shared exhaust.  Or do you have 
> a single exhaust with 2+ exhaust fans pulling simultaneously, so 
> there’s always /some /exhaust air moving if one fan is down?  The 
> conventional wisdom around here has its share of holes, so I’m out to 
> learn from the broader nanofab cleanroom community.  How are your 
> cleanrooms’ exhaust systems are configured, especially if you’ve had 
> to go down this cleanroom design rabbit hole?
>
> I’m also broadly open /any/ other lessons learned regarding 
> provisioning exhaust or other utilities – whatever you feel like 
> sharing.  Too much information during the design phase is far better 
> than too little.
>
>
> Thanks,
>
> Travis Massey
>
> Center for Micro and Nano Technology (CMNT)
>
> Lawrence Livermore National Laboratory (LLNL)
>
>
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*Nathanael Sieb *
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<http://www.4dlabs.ca/>
Simon Fraser University
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