[Equest-users] Outside Air Supply

[Carol Gardner]

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On Tue, Apr 5, 2011 at 10:01 AM, M. Shields <mshields at fstrategies.com>wrote:

> Hi all,
>
>
>
> I am trying to set up a model to which uses minimum ASHRAE 62.1 ventilation
> rates and I’m having a bit of trouble.  My understanding is that in the zone
> setup the outdoor air can be setup to use 4 different specification methods,
> but equest will only use whichever is greatest (ie, 5cfm/person or .06
> cfm/sqft) but not combine them.  It therefore seems like the best method for
> this is to use 62.1 to calculate cfm/zone and just enter that number.
>
>
>
> I then go to my system screen for OA, where I can specify the OA ratio,
> control method, etc.  If I set the ratio to be 1, and the sizing method to
> be Sum of Zone OA , then when I go to the SV-A report shouldn’t my numbers
> there match exactly what I have entered for all my design values?  I set up
> a very simple zone that had 100 cfm design flow, 50 cfm min OA, and 50 cfm
> exhaust, and then when I run a simulation and open the SV-A report it lists
> my design cfm as 103, OA as 52, and exhaust as 53.  I don’t understand why
> these design values are slightly higher, anyone have any thoughts?
>
>
>
> ____________________________
> Michael Shields, EIT
> Facility Strategies Group, LLC
>
> 1012 Market Street, Suite 307
>
> Fort Mill, SC 29708
>
> Phone: 803-493-4507
>
> Fax: 803-548-2511
> Email: mshields at fstrategies.com
>
>
>
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>


-- 
Carol Gardner PE
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