[Equest-users] Supply Fan Power

[vignesh kumar]

Dear Rakesh,

You are correct  in the  section G 3.1.2.1 it is specified as that  Base
case system efficiencies are inclusive of the indoor fan power.

 But as per the G3.1.2.4 the supply and return fans shall operate
continuously whenever spaces are occupied and shall be cycled to meet
heating and cooling loads during un-occupied hours . if the supply fan is
modelled as cycling and fan energy is included in the energy – efficiency
rating of the equipment, fan energy shall not be modelled explicitly.
If the above case is not true then  you can follow the  method specified in
Alternative calculation manual(Ref attached image) to segregate the Fan
power from the total EER if you know the combined EER at a particular dry
bulb and wet bulb temperature(may be even at AHRI condition) having said
that the fan power for all the fans has to be calculated as per the
Table-G3.1.2.9

Hope this helps

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

*Vignesh Kumar*
*Senior Project Consultant
LEED Green Associate.
BEE-Energy Auditor.*

T:

+91-7276239991

F:

+44 (0) 141 945 8501

http://www.iesve.com

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