<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:10pt">Richard:<br><br>I would base the model on one boiler/hot water loop with heating coils in each air handler. As far as airflow, I would let eQuest autosize the CFM. Run the simulation and if there are excessive unmet hours that cannot be corrected by throttling range adjustments, try bumping up the airflow above the amount that eQuest calculated.<br><br>Fan energy is calculated using the CFM, minimum motor efficiency and estimated duct static loss per 90.1-2007 6.5.3.1.1A.<br><br>For the VAV portion, you can set the minimum and maximum fan ratios or you can define a discharge air reset schedule.<br><br>Paul Diglio<br><div style="font-family: times new roman,new york,times,serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font
face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> "RJTHEACMAN@aol.com" <RJTHEACMAN@aol.com><br><b><span style="font-weight: bold;">To:</span></b> equest-users@lists.onebuilding.org<br><b><span style="font-weight: bold;">Sent:</span></b> Thu, March 3, 2011 12:47:49 PM<br><b><span style="font-weight: bold;">Subject:</span></b> [Equest-users] Fedx<br></font><br>
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<div>I am modeling a 110,000 sf. Fedex sorting facility for LEED and the
building has a small office area that is heated and cooled by rooftop
units and the remainder of the warehouse is only heated.</div>
<div> </div>
<div>In accordance with ASHRAE 90.1 2007 if no cooling system exists the cooling
system shall be identical to the system modeled in the baseline building
design.</div>
<div> </div>
<div>That system is a system 5 packaged vav with reheat, which includes a hot
water boiler. </div>
<div> </div>
<div>We have (15) gas-fired unit heaters that provide heat to the
warehouse.</div>
<div> </div>
<div>My question is do I set up my heating system with 15 hot water boilers, the
same heating capacity as the unit heaters?</div>
<div> </div>
<div>For the fan energy, do I set my air quantity the same as my unit
heaters?</div>
<div> </div>
<div>How do I address the VAV portion of the system as well as the hot water
pumps?</div>
<div> </div>
<div>I have my model setup with (2) separate HVAC systems (1) Packaged VAV with
Reheat and (2) Packaged rooftop DX units with a gas furnace.</div>
<div> </div>
<div>Any help will be greatly appreciated.</div>
<div> </div>
<div>Richard Dominick, P.E.</div>
<div>TEC Engineers, LLC.</div>
<div>Norwalk, CT.</div></div></font></div></div>
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