Hi?
You can input the EER in eQUEST wizard mode?and then click the finish button?the EIR generated by eQuest in detailed mode is what you want.And also you can calculate it per Elizabeth's suggestion.

Yongqingzhao

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???: "Elizabeth Gillmor"
????: 2015?06?09? 22:09:31
???: "Omar ElRawy";
??: "equest";
??: Re: [Equest-users] Indoor fan separation at ARI

I seem to get this comment frequently so I have it all typed out as a stock LEED comment response.  The advice you received is correct. You can use the following formulas for fan power and EIR:

kW/cfm = BHP / 0.746 * Fan Motor Efficiency     (<----from Appendix G)

BHP = CFM * 0.0013 + Pressure Drop Adjustment

The baseline EIR is then calculated with fan energy modeled separately, using the following formula (same as what eQuest uses in Wizard mode):

????

Where ARI Fan Power = fan power at rated ARI conditions (W/Btuh), and CAP = total cooling capacity (Btuh).  At rated ARI conditions, the supply fan is rated at 0.365 kW/cfm and 400 cfm/ton, such that:

????

When normalizing the cooling capacity, the formula is:

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When applied to a baseline EER=9.5, the resulting EIR=0.3051.  The eQuest wizard will also do this for you correctly, but usually at LEED submittal time we are all well past the wizard phase, so the formulas above are handy to have.  

Good luck!

Elizabeth

Elizabeth Gillmor  PE, LC, LEED AP

e n e r g e t i c s  consulting engineers, llc
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