Forum discussion
NC-2009 EAp2: Minimum Energy Performance
Question: If I have an air cooled chiller selected at non-ARI conditions that has a full load efficiency of 3.0 COP, does it comply with the minimum efficiency requirement of 2.8 COP from ASHRAE - 90.1, or does it have to be re-selected at 44 leaving water, 95 condensing air temp, and 2.4 gpm/ton? How about other air-cooled equipment and cooling towers?
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 19, 2012 - 10:12 am
The minimum efficiency requirements are at the test conditions for all the equipment. If the manufacturer cannot supply the performance at the test conditions you will need to make the case that your equipment complies.
Jackson .
December 20, 2012 - 4:57 am
We also has this difficulty, as our project is at Asia,. When contacted the international chiller manufacturer, their local assembly chiller does not go for ARI testing, but those in US are. Is not commercially wise to import these equipment across to our project here.
We able to find local assembly chiller which has equivalent COP as in ASHRAE requirement but not ARI Tested. Can the manufacturer test report help us to meet EAP2 requirement?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
December 20, 2012 - 4:01 pm
I would most certainly enlist the manufacturer to help you document efficiency compliance. Perhaps the chiller curve could be used to help demonstrate compliance?