Forum discussion
CS-2009 EAp2: Minimum Energy Performance
We are modelling our CS case in Sao Paulo (Climate 2A). the language in ashrae 90.1 2007 was not so clear so though i should ask here,
Is it necessary to have a heat exchanger for our base case for the prerequisite and for the credit simulations ???
Thank you
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
5907 thumbs up
January 18, 2013 - 10:23 am
I assume you are referencing exceptions d/e under G3.1.2.10. First of all your system would need to have both a design supply air capacity of 5000 cfm or greater and have a minimum outdoor air supply of 70% or greater of the design supply air quantity. If it does then in your climate zone energy recovery would not be required on your heating system but would be required on your cooling system. Just because it is not required on your heating system does not make the entire HVAC system exempt.