Forum discussion
NC-2009 EAp2: Minimum Energy Performance
Has anyone compared ASHRAE 90.1-2007 vs 90.1-2010 to see, if you get the same points in EAc1 or do you get less points? In other words, will it be more difficult to get points in LEEDv4, when 90.1-2010 must be used?
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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?
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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?
Jean Marais
b.i.g. Bechtold DesignBuilder Expert832 thumbs up
September 6, 2013 - 8:07 am
ASHRAE Journal - May 2013, Figure 1, pg. 38 "A Stable Whole Building Performance Method for Standard 90.1" by Michael Rosenberg
Accourding to Mike, it's going to get much harder. 30% ENERGY savings with 2007 will get you roughly 14% with 2010.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
September 9, 2013 - 9:51 am
US DOE evaluates the relative stringency of each version of 90.1 relative to the previous one. Here is the link to their determination - http://www.energycodes.gov/regulations/determinations
Mohammad H Abbasi
Senior ConsultantWSP
LEEDuser Expert
18 thumbs up
January 31, 2018 - 3:31 pm
Marcus - I need a single number showing the difference between ASHRAE 90.1 2007 & 2010, in ASHRAE Journal, Micheal Rosenberg identifying 16% gap as Jean mentioned in the first comment but there is supporting quantitative document for ASHRAE 90.1 2010 showing the gap for different building types and for instance, mid rise residential has 6.98% which is way lower than other building types, please advice.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
February 5, 2018 - 1:26 pm
Looks like 18.2%.
https://www.energycodes.gov/ansiashraeies-standard-901-2010-final-determ...