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NC-v4.1 EAp2:Minimum Energy Performance

Regd. reheat coils used in terminal boxes in a hospital project

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Anurag Ghosh
Assistant Sustainability Manager
L&T Construction
LEEDuser Basic Member
2 thumbs up

Hi, we have a hospital project following ASHRAE 90.1 2013 and having cooling as the predominant system. There is monsoon reheat using 2 electric hot water generators connected to the reheat coils in terminal fan boxes. The monsoon reheat basically serves as a means of RH balancing. 

 

Now I have couple of doubts to be clarified here:

1. I have performed the complete energy modelling( setting the heating setpoint temperatures and RH considering reheat coils), however I am not finding any percentage energy consumption due to reheat coils. What can be the reason?

2. Whether any baseline heating system to be considered for the above case(having reheat coils in critical spaces to balance RH) as per ASHRAE 90.1 2013

Thanks a lot in advance and appreciate your reply.

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Fri, 02/21/2025 - 16:31

1. This issue would require troubleshooting of the modeling inputs which it outside the scope of this forum. I recommend contacting the software support team if you are unable to resolve this. 2. The Baseline system is determined using Table G3.1.1-3 based on building type/size and climate zone, with additional modifications for dehumidification as outlined by Section G3.1.3.18. 
Profile picture for user anuragg
Anurag Ghosh
Assistant Sustainability Manager
L&T Construction
LEEDuser Basic Member
2 thumbs up

Sat, 02/22/2025 - 13:45

Hi Tyler, I would like to reclarify whether such reheat coils connected to electric hot water generators (for only purpose of monsoon RH balancing) would normally bring an output in heating section for total energy consumption.Thanks for the previous clarification.

Mon, 02/24/2025 - 12:50

Yes I would expect this electric reheat energy to be reported within the space heating section.

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