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Join Date: Mar 2012
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Standard Codes for Laundry Exhaust Air Changes

07/08/2017 2:50 AM

I have tried to check for written down codes eg ASHREA or CIBSE for exhaust ACH for laundry without success. ASHREA only mentions fresh air requirements for oxygen levels if I am correct. CIBSE mentions ACH of almost everything else including kitchens (30-40 ACH) but not laundry.

I am working with a consultant who expects the laundry rate to be higher than kitchen which I find tricky since kitchen has exposed fire flames. In the laundry I am putting a dedicated exhaust system for equipment directly hard connected hence the system in question is the general exhaust per space volume.

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#1

Re: Standard codes for Laundry exhaust air changes

07/08/2017 3:53 AM

Assuming the dedicated exhaust systems draw air from the room into the equipment and exhaust to atmosphere, I would check the ACH due to that. You might find there's no problem.

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#2
In reply to #1

Re: Standard codes for Laundry exhaust air changes

07/08/2017 7:01 AM

Thanks Codemaster for your prompt response.

What is the general ACH for laundry? Any reference will be appreciated.

Can laundry ACH be higher than the kitchen?

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#3
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Re: Standard codes for Laundry exhaust air changes

07/08/2017 7:30 AM

Sorry, but I've no idea. It isn't my field, I was just making a general comment. But I can't see why a laundry would need to be much different from say an office. If dry cleaning is used there might be a need for higher ACH to disperse solvent vapour.

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#9
In reply to #3

Re: Standard codes for Laundry exhaust air changes

07/10/2017 3:11 AM

<...disperse solvent vapour...> What - all over the neighbourhood?

It ought to be collected and re-used!

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#11
In reply to #9

Re: Standard codes for Laundry exhaust air changes

07/12/2017 1:13 PM

Yes, why not? There are plenty of occasions where it's not possible or practical to remove all nasties, but OK to discharge to atmosphere, where it's well diluted, rather than expose the workforce to it. I've had dry-cleaned kit where you could still smell solvent, unlikely to be high enough concentration to recover, but the staff would prefer not to breathe it all day, so no doubt the place had adequate ventilation.

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#4

Re: Standard Codes for Laundry Exhaust Air Changes

07/08/2017 11:44 AM

It all comes down to equipment, chemicals, number of people, classification and square footage....

Kitchens15 - 60
Laundries10 - 15

http://www.engineeringtoolbox.com/air-change-rate-room-d_867.html

http://www2.iccsafe.org/states/newjersey/NJ_Mechanical/PDFs/2006_Chapter%205-Exhaust%20Systems.pdf

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#5

Re: Standard Codes for Laundry Exhaust Air Changes

07/08/2017 1:28 PM

Gas powered clothes dryers might be a factor.

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#6

Re: Standard Codes for Laundry Exhaust Air Changes

07/09/2017 9:39 AM

Most laundry facilities I've seen have little in the way of ventilation....mostly open doors front and back.....sometimes a fan mounted in the wall.....Kitchens on the other hand generally have a fresh air supply that is exhausted out the hood...

http://www.inspectionnews.net/home_inspection/fireplaces-chimneys-and-solid-fuel-burning-appliances-home-inspection-and-commercial-inspection/16787-laundry-room-exhaust.html

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#7
In reply to #6

Re: Standard Codes for Laundry Exhaust Air Changes

07/09/2017 10:30 AM

If you leave doors open for laundry you are allowing very humid warm air into the space (tropical coastal location), dust and other contaminations...which will affect not only people but also machines and linen. We been requested to install a treated fresh air with filters....our request for louvered doors has been flatly rejected.

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#8
In reply to #7

Re: Standard Codes for Laundry Exhaust Air Changes

07/09/2017 3:55 PM

So then you go with package on the roof with a fresh air intake....

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#10

Re: Standard Codes for Laundry Exhaust Air Changes

07/11/2017 9:46 PM

First check your local codes. These will be the determining requirement for number of air changes per hour. Solar Eagle has given you some idea of ranges.

Remember, since you will be exhausting air, you will have to provide for a make-up source.

Also remember that since the air being exhausted will contain dust and lint, some sort of filter will be required on the intake.

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#12

Re: Standard Codes for Laundry Exhaust Air Changes

07/18/2017 5:32 PM

Am I reading 'directly hard connected' to the equipment? If so you need to talk to the manufacturer. They will have info on the amount of air needed. I say this because of your reference to kitchen equipment. Most kitchen equipment is not rated to be direct connected to the exhaust. Hope your project goes well. - Circuit Breaker

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Casper71 (1); Circuit Breaker (1); Codemaster (3); Lujo (2); PWSlack (1); Rixter (1); SolarEagle (3)

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