[Bldg-sim] 90.1 Occupancy

[Dennis Knight]

Robert,
Nick is right on.
Two more schedule resources for energy models are:
1. The COMNET Commercial Building Energy Modeling Guidelines and Procedures
available online at: http://www.comnet.org/. The schedules in this document
are identical to and taken directly from the ASHRAE 90.1 User's Manual.
2.  The U.S. Department of Energy Commercial Reference Building Models of
the National Building Stock produced by NREL.  They can be obtained from
the following link: http://www.nrel.gov/docs/fy11osti/46861.pdf.  The
schedules are found in Appendix B of this document and were developed from
resources as far back as 90.1-1989.  The schedules include several extended
building sizes and types not included in 90.1.  The notes say some of the
schedules have been modified based on NREL's research, experience and
judgement.
Finally, I would take the recommendation of Nick one step further and try
to get agreement from the Owner on things like operating and occupancy
schedules in an OPR type of document or something.  Especially if you are
trying to make an estimate of future energy cost/consumption which is not
always a good idea without some kind of disclaimer.
Hope this helps, good luck,
Dennis

On Thu, Jan 10, 2013 at 4:18 PM, Nick Caton <ncaton at smithboucher.com> wrote:

> Hi Robert!
>
> If you mean scheduling for lighting and/or occupancy, 90.1 does not
> strictly require anything.  You can use whatever makes sense for the
> building so long as you are matching between baseline and proposed.
>
> That said, if you are uncomfortable developing your own scheduling and/or
> are looking for guidance, ASHRAE has published out schedules of this nature
> that the 90.1 User's manual references.  They are a series of tables from
> 90.1-1989 for different building occupancy types (School/Warehouse/etc).
>  None of these building types is "4-story dorm," but you could likely
> reference "Hotel" and/or "health/institutional."  If you don't have
> 90.1-1989 handy on your shelves, I know these schedules are freely
> available incorporated as part of the Washington State Energy Code (2009),
> and possibly other places.
>
> It's probably worth mentioning the mechanical designer (where applicable)
> is probably the most defensible source for any project-specific scheduling.
>  I don't always feel it's a requirement, but getting the mechanical
> designer's input in writing for any scheduling you're unsure of is always a
> safe bet.
>
> It's also worth mentioning the schedules generated in a weighted occupancy
> fashion by eQuest (which I think you're referencing) have in my experience
> gone largely unchallenged over many LEED projects.  The results are often
> quite reasonable when you do not have anything more specific to reference.
>  If I recall correctly some time ago, discussions across one of these
> mailing lists revealed the schedules "under the hood" used for each
> occupancy type are in fact referencing ASHRAE-based sources/research.
>
> Regards,
>
> ~Nick
>
> NICK CATON, P.E.
> SENIOR ENGINEER
>
> Smith & Boucher Engineers
> 25501 west valley parkway, suite 200
> olathe, ks 66061
> direct 913.344.0036
> fax 913.345.0617
> www.smithboucher.com
>
>
> -----Original Message-----
> From: bldg-sim-bounces at lists.onebuilding.org [mailto:
> bldg-sim-bounces at lists.onebuilding.org] On Behalf Of RobertWichert
> Sent: Thursday, January 10, 2013 9:49 AM
> To: bldg-sim at lists.onebuilding.org
> Subject: [Bldg-sim] 90.1 Occupancy
>
> Does anybody know off the top what the ASHRAE 90.1 Lighting Occupancy is
> for High/Mid (four story) Residential Apartment/Dorm (private baths)??????
>
> I'm using "Building Area Multi-Family" now, but I'm not sure that's right,
> and I can't find anything better.
>
> Hoping for a better answer....
>
>
> Thanks!
>
>
>
> --
> Robert Wichert P.Eng. LEED AP BD&C
> +1 916 966 9060
> FAX +1 916 966 9068
>
>
>
>
>
>
>
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-- 
M. Dennis Knight, P.E.
Founder & CEO
*W*hole *B*uilding *S*ystems, LLC
P.O. Box 1845
Mt. Pleasant, SC 29465
Phone: 843-437-3647
Email: dknight at wholebuildingsystems.com
Website: www.wholebuildingsystems.com
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