[Equest-users] Minimum Fresh Air AHU

[Omar Katanani]

Hi Guys,

May I ask why are you doing this process?

My understanding is that I double click on each zone, go to the Air flow/Outside Air, and enter the CFM of the fresh outside air. In what cases do I need to create an AHU for fresh air?

Thanks!
Omar

___________________________

Omar Katanani
Sustainable Design Engineer
Email: omar at ecoconsulting.net


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-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org on behalf of Carol Gardner
Sent: Wed 11/3/2010 6:41 PM
To: Andy Harrison
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Minimum Fresh Air AHU
 
Andrew,

Create a Dummy space, very small 1ft x 1ft x 1ft with no load and then a
Dummy Zone for it and use this for your zone. I would not use Multi Zone but
rather PSZ if you are supply the fresh air at a constant volume or PVAVS if
it is supplied at a variable volume.

Best,

Carol

On Wed, Nov 3, 2010 at 2:48 AM, Andy Harrison <Andy.Harrison at arup.com>wrote:

> Hi All,
>
> I am trying to model a building which has a minimum fresh air AHU serving
> all zones, each of which also has a local cooling unit.  I was trying to
> model this using a single zone AHU for each zone, with outside air to all
> units coming from the multizone unit, which I created later, however I am
> getting an error saying that the multizone AHU needs to be assigned at least
> one zone.  How can I do this, when all of the zones are assigned to a local
> unit?  If I assign a small zone to get rid of the error, will the multizone
> AHU only be sized for the cooling load associated with this zone?  How can I
> confirm that the multizone AHU is sized for the appropriate fresh air load?
>
> Regards,
>
> Andrew
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-- 
Carol Gardner PE

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