[BLDG-SIM] 90.1 Appendix G and Dedicated Outside Air Units

[Dogan Yiginer]

Jonathan,
 
You need to put the 100% OA in the baseline building if it is lab or a
hospital. App. G spells it out distinctly, just read the section about air
changes. The preheat coils must be the same in the proposed design and the
baseline building as in G3.1.2.3. 
 

Dogan Yiginer
Davis Langdon

370 Lexington Avenue

25th Floor
New York, NY 10017
Tel:          212-697-1340
Fax:         212-697-1344
dyiginer at davislangdon.us

www.davislangdon.com <http://www.davislangdon.com/> 

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From: BLDG-SIM at gard.com [mailto:BLDG-SIM at gard.com] On Behalf Of Jonathan
Curtin
Sent: Monday, October 01, 2007 2:28 PM
To: BLDG-SIM at gard.com
Subject: [BLDG-SIM] 90.1 Appendix G and Dedicated Outside Air Units


All,
 
I was looking for some help on interpreting how a baseline 90.1 Appendix G
building should be modeled if the proposed building uses a dedicated outside
air unit.
 
My interpretation is that the baseline building should be modeled without
the 100% outside air unit (and per Table G3.1.1B), but in this case could
you add preheat coils to the baseline simulation main air handling units, if
not in the proposed? 

G3.1.2.3 Preheat Coils. If the HVAC system in the proposed

design has a preheat coil and a preheat coil can be modeled

in the baseline system, the baseline system shall be

modeled with a preheat coil controlled in the same manner as

the proposed design.

Thanks,

Jonathan Curtin



W  Y  L  I  E 
C O N S U L T I  N G
E  N G  I  N  E  E R S

6161 Savoy, Suite 700   Houston, Texas 77036
713.781.2526     713.781.2536 fax

www.wylieassociates.com <http://www.wylieassociates.com/> 


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