Forum discussion
NC-2009 EAp2: Minimum Energy Performance
Hi,
Our problem is with PTHP (cooling mode) new construction.
The footnote 'c' is bit confusing. According to the footnote, the capacity should be in KW and some publish documents say it should in Btu/hr.
Can anyone help us to resolve this issue.
Regards,
KC
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
5921 thumbs up
November 8, 2013 - 10:13 am
Are you using the SI or IP version? My IP version says BTU/h.
Keerthi Ratnayake
Managing DirectorEnviron Pvt. Ltd
38 thumbs up
November 10, 2013 - 12:40 am
Hi Marcus,
This is SI edition. The equation is 3.60-(0.213*Cap/1000). If the input is in kW, we believe, deviding the Cap by 1000 is not required.
Any idea?
Regards,
KC
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5921 thumbs up
November 12, 2013 - 9:39 am
I just saw you were asking about 90.1-2004? This version of the standard does not apply to LEED 2009 projects. So you might want to check the 2007 version of the standard and any addenda which may apply. If this is an error I am sure it was caught by now. The results of the calculation should be pretty obvious as the COP should be a single digit number. You could check it against the IP version formula - 12.5-(0.213*cap/1000) EER. COP = EER/3.412