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without looking at 90.1 right off i can't tell you, BUT i would be
careful about how you input your ERV. especially how it is
controlled. an uncontrolled ERV in your simulation will negatively
impact your simulation. i.e. add cost to your proposed case. i
would suggest setting up a couple of eers to check different delta t
(or enthalpy, or both) depending on your project and location &
go with what gives you the best return. that is if you're part of
the design team and not after fact impart the best control strategy
for the erv to the design team/construction documents so you can use
that in the leed simulation. i am referring to an uncontrolled ERV
as one that is on whenever the supply fan for the unit it is
attached to is on - and by 62.1 that 'on' position is whenever the
space is occupied, which is typically business hours.<br>
<br>
On 8/20/13 6:35 PM, Kim dk wrote:
<blockquote
cite="mid:CAFdJG-gBBMv616MgF6itUnt_WUYJbs57RjiVgjtUC+h3k_s84Q@mail.gmail.com"
type="cite">
<div>Hi eQuesters!<br>
<br>
I am modeling a Laboratory building with Fume Hoods (Climate
zone 4A).<br>
<br>
Per ASHRAE 90.1-2007 Appx.G 3.1.2.10, the baseline laboratory
AHUs should be installed with Energy Recovery (SA>2400L/s
& OA 70%).<br>
However, there are 'Exceptions' and one of which says as follow:</div>
<div> </div>
<div><u><strong>h.</strong> Systems serving laboratories wish
exhaust rates of 2400 l/s or greater.</u></div>
<div> </div>
<div>Does it really mean that the Baseline AHU is not required to
have ERV if the AHU has an exhaust rate(Not return) of 2400 l/s
or greater??</div>
<div> </div>
<div>I don't know the reason under that exception(h), but anyhow,
that will be beneficial for my proposed model which has
ERV(sensible HX) for the laboratory AHUs.</div>
<div> </div>
<div>Any comment on this?</div>
<div> </div>
<div>Thank you !!</div>
<div> </div>
<div>Kim</div>
<div> </div>
<div> </div>
<br>
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