Hi All,
I have seen this point tackled in many comments earlier but we still have some doubts. We have a residential building of 16 floors which sits on a podium of 3 floors. Our issues are as follows:
1. Lighting Power Density
Our proposed design consists of complete lighting layout which has separate wiring for lighting including distribution board and separate power wiring to wall receptacle fixtures. We want to use space by space method by considering lighting of 12 W/m² for baseline bedroom by selecting Hotel/Motel Guest Rooms from Table 9.6.1 and12W/m² living room including kitchen as Dormitory Living Quarters.
a. Is the above approach fine as building plans are completely designed or do we need to include receptacle load as per Energy Star Multi Family High Rise Program document? (essentially what approach is agreeable by LEED)
b. Is it necessary to consider lighting irrespective of approach to only operate 2-3 hours per day or is it only for cases where LEED approach per 1712 is adopted?
2. Corridors, electrical, IT closet rooms located on typical residential floors are considered as non-residential conditioned spaces and system type selected is system 8. We also read comments from Marcus earlier which consider corridors in residential spaces as they only serve apartments.
a. Is our conservative approach understandable by selecting an efficient baseline system and hence improving baseline performance ?
b. IT closet and electrical rooms on each typical floor have normally high process load and they are located on each floor (for our case 16 floors). If above approach is considered ok, then our IT & electrical rooms will fall under system 4 due to high process load but if above approach is not ok, then what space category shall be selected for IT & electrical rooms including baseline system type and lighting?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
November 22, 2016 - 12:36 pm
1a. No Hotel/Motel Guest rooms cannot be used for multi-family residential buildings. 90.1 does not regulate the lighting in these buildings so you have to use the Energy Star multi-family simulation methodology.
1b. You have to use the allowable lighting schedule unless you can prove that that schedule does not apply to your situation.
2. For LEED you can do it either way. In my opinion the corridors are clearly residential as they only really serve a residential function.
2a. That could be justification for modeling it the way you suggest.
2b. Electrical closets are Electrical/Mechanical spaces. They typically do not contain much process energy loads as the "heat" from the electrical equipment is not usually included in the models. They often do not contain any separate space conditioning equipment. If they do then you might be able to justify a separate HVAC system. IT closets may contain some process loads. Again if they have separate space conditioning equipment installed then you could probably justify a separate baseline system.