Forum discussion
NC-2009 EAp2: Minimum Energy Performance
LEED Interpretations state that hard-wired lighting in residential units must be modeled identically in the baseline and proposed cases. Does this apply to college dormitories as well? Specifically when all of the lighting will be hard wired and the students are not expected to have any lighting plugged into receptacles.
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
August 7, 2013 - 2:39 pm
Technically this does not apply to a dorm. There is a dorm lighting power density for the living quarters in Table 9.6.1.
In my experience it is unrealistic to expect that the students will not bring plug in task lighting so you should model an allowance for it as well.
Jean Marais
b.i.g. Bechtold DesignBuilder Expert832 thumbs up
August 8, 2013 - 3:20 am
How does Table 9.5.1 "Multifamily" or Table 9.6.1 Building Specific Space Types "Hotel" or "Dormitory--Living Quarters" fit into the first statement?
Secondly, as one or more building area method building types can be used, but building area method and space by space methods may not be mixed, could one use the building area method for the residential part of a building (one building type) and a space by space method for the non-residential part of the building (the other building type)?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
August 8, 2013 - 9:57 am
A dorm is not considered multifamily. They are both different types of residential projects.
I think that would be mixing BAM and SBSM to use one for one part of the building and the other for the remainder.
Jean Marais
b.i.g. Bechtold DesignBuilder Expert832 thumbs up
August 8, 2013 - 10:33 am
Let's say I WANT to do space by space for EVERYTHING. But I have one thermal zone for each residential unit. Where does that leave me?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5912 thumbs up
August 8, 2013 - 10:45 am
You can use 1.1 W/sf for the residential units but you follow these guidelines if you want to claim any savings within the residential unit - http://new.usgbc.org/resources/energy-star-multifamily-high-rise-simulat...
Jean Marais
b.i.g. Bechtold DesignBuilder Expert832 thumbs up
August 8, 2013 - 11:57 am
I've read those before, but was un-aware of this alternative path. Thanks.
Did you mean 2W/sf? Where does 1.1 W/sf come from?
Table 5-10 of
U.S. Lighting Market Characterization: Volume 1: National Lighting
Inventory and Energy Consumption Estimate
by Navigant Consulting gives the value of
2.0W/SF as a
typical installed wattage in multif
amily buildings. The LEED ruling to a
Credit Interpretation
Request allows using 2.0W/SF as
a Baseline for lighting performance
credit in residential units