Hello,
We are doing a LEED CI project in China. This is a office building with two 16-floors buildings A, B and a 9-floors building C, which are connected by a 7-floors podium. The project occupied the whole 5th floor area of the building C. This is an existed building which is not built to meet ASHRAE 90.1-2007 standard. We are just doing the interior decoration.
1 For EAp2 is there any energy code in China could be considered as equivalence with ASHRAE 90.1-2007?
2 Do we have to list all parts of the existed building to show that they meet Section 5.4 to 10.4 and Section 5.5 to 10.5 in ASHRAE 90.1-2007. Or we just have to build an energy model to show that the energy performance meets the standard?
3 For the energy model, do we have to build up the whole building with A, B, C and the podium? Or just Building C? Or just the 5th floor?
Thank you very much!
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
August 6, 2012 - 9:43 am
1 - don't know
2 - The project must meet all the X.4 sections as these are the mandatory provisions. Beyond that the prescriptive measures (X.5) are available for trade-off in either Section 11 or Appendix G.
3 - The Reference Guide says you must model the whole building. We are working on another project that is submitting an Interpretation on this issue.
Amy Boyce
Manager, LEEDUSGBC
29 thumbs up
August 6, 2012 - 11:18 am
Diana,
If you are only looking to meet the prerequisite, a model is not necessary. If you do want to use the modeling approach to meet c1.3, you need to choose the appropriate building segment, which will include the project space, as well as other parts of the building that are served by the same HVAC system.
Diana Hill
8 thumbs up
August 6, 2012 - 8:29 pm
Thank you very much for the answer.
The problem is the existing building won't meet the mandatory provisions.
The client just installed new lighting, new carpets and other interior decorations. They won't make any change of the envelop and HVAC/service water heating system.
If this means, for EAp2 we only have to meet those related to our work (i.e. Section 9.4) ?
For EAp2, do we have to build an energy model?
Thank you very much in advance.
Taylor Ralph
PresidentREAL Building Consultants
31 thumbs up
August 6, 2012 - 2:25 pm
The requirements for CI only include portions of the project that are within the budget/scope of the work related to that project only--not the entire building.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
August 6, 2012 - 4:26 pm
You only have to meet the mandatory provisions related to your scope of work. As Amy indicates above no model needed for EAp2.
Sorry I was thinking EAc1.3 in my reply to #3 above. And the project I referenced is served by a central plant. Given the scope of Diana's project above I assumed a central plant but I could be wrong about that.
Regarding the scope of the model on page 169 of the Reference Guide, Step 2 it indicates that if the project is served by a central plant the whole building must be modeled. Any one know if this was changed via addenda or interpretation?
Sorry if my cursory response above caused confusion. Glad to see some else is paying attention!
Amy Boyce
Manager, LEEDUSGBC
29 thumbs up
August 6, 2012 - 4:37 pm
Marcus, you are correct that if the building is served by one central plant, the entire building must be modeled. In the case mentioned above, I didn't know if that would be the case, as there are three buildings making up the "base building" and they may have distinct systems among them.
Diana, the rest of the building "segment" may be modeled with existing conditions in both the baseline and design cases, though items within the project space itself must be modeled against the requirements of the standards. Since you are touching so little in the space, the project might still not meet the requirements. In your case, it is probably better to follow the prescriptive path.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
August 6, 2012 - 8:54 pm
Having to model the whole building with a central plant is a major problem for the project we are working on. We wrote a CIR many years ago which was approved for NC where we proportioned the load on a central plant to model an addition. The same methodology could be applied for a CI space IMO.
The biggest problem is often determining the existing conditions beyond your scope especially in multi-tenant spaces.