Forum discussion
NC-2009 EAp2: Minimum Energy Performance
Folks,
Is there any exception for the 2% and 3% voltage drop? We are working on a subway station and we were able to achieve 3,5% to the feeders and 3% to the to the branch circuits. Achieve 2% and 3% will increase construction cost significantly according to the electrical system designer. Is there any percentage allowance?
Thanks
LEEDuser is supported by our premium members, not by advertisers.
Go premium forTo post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.
A portion of our building envelope is historic. Can we exclude it from our model?
For an existing building, do I need to rotate the model?
Our process load is higher than 25%. Do we have to justify that?
Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?
Can mezzanines open to floors below be excluded from the energy model?
How do I provide a zip code for an international location?
For a project outside the U.S., how do I determine the climate zone?
For a project outside the U.S., how do I determine the Target Finder score?
Do hotel rooms need automatic light shut-off control?
How commonly are the 90.1 mandatory compliance forms submitted as part of EAp2/EAc1?
The Section 9 space-by-space method does not include residential space types. What should I use?
Can the Passive House Planning Package (PHPP) be used to energy model for LEED?
Which baseline HVAC system do I use if my building has no heating or air conditioning?
Our project has a diesel backup generator. Should we include it in our energy model?
Can SHGC be higher in the proposed than in the baseline model?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
December 13, 2012 - 11:06 am
There do not appear to be any exceptions to this mandatory provision in 90.1.
Amy Boyce
Manager, LEEDUSGBC
29 thumbs up
December 13, 2012 - 10:52 am
Hi Marcio,
This topic was explored by the EA TAG a few months ago. While they didn't feel that it was appropriate to make an overall exception to the requirements, they did decide on what they felt was a fair compromise.
From LI #10218:
"...the mandatory provision of ASHRAE 90.1-2007/2010 Section 8.4 will be met as long as the total voltage drop does not exceed 5%."
This may not be helpful to your situation, but you should be aware that it is out there.
Thanks