Forum discussion
NC-2009 EAp2: Minimum Energy Performance
I got this question via email and thought I would post it here for your help. Thanks!
Q: If a project is pursuing EQc2 Increased Ventilation, what ventilation levels do they model for EAp2 in the baseline model and what ventilation levels do they model in the proposed model?
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?
Haojie Wang
Energy ModelerKJWW Engineering
4 thumbs up
April 20, 2016 - 12:32 pm
Both as designed.
Dave Hubka
Practice Leader - SustainabilityEUA
LEEDuser Expert
534 thumbs up
April 20, 2016 - 3:46 pm
There is one exception that allows the modeler to claim savings when demand-control ventilation is incorporated into the design when it is not required by ASHRAE 90.1-2007 Section 6.4.3.9.
Haojie Wang
Energy ModelerKJWW Engineering
4 thumbs up
April 21, 2016 - 11:50 am
Yes, but in that case, they will need to model baseline ventilation as 62.1 minimum, wont that reduce your savings since your proposed is at least 30% over 62.1.
Dave Hubka
Practice Leader - SustainabilityEUA
LEEDuser Expert
534 thumbs up
April 21, 2016 - 3:51 pm
DCV reduces OA levels below the ASHRAE minimum during times of actual low occupancy so it should reduce the total annual energy consumption.
It is not a gauranteed energy saving measure, however it may lead to savings.
The preliminary modeling runs will help the team determine if savings are achieved.
You bring up a great point, thank you for posting.