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<DIV dir=ltr align=left><SPAN class=467101717-08022008><FONT face=Arial
color=#0000ff size=2>Varkie,</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=467101717-08022008><FONT face=Arial
color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=467101717-08022008><FONT face=Arial
color=#0000ff size=2>Table G-M of the ASHRAE 90.1-2004 User's Manual (note this
is a different document than the standard itself) provides occupancy, lighting,
HVAC, Domestic Hot Water, and Elevator schedules for school buildings. I use
these schedules all the time, especially since it is the only place I have seen
an elevator schedule. The table includes this note:</FONT></SPAN></DIV>
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<P align=left><FONT face=Arial><EM>Schedules for occupancy, lighting,
receptacle, HVAC system, and service hot water are from ASHRAE Standard
90.1-1989 and addendums, except that 5% emergency<SPAN class=467101717-08022008>
</SPAN>lighting has been added for all off hours. Elevator schedules, except for
restaurants, are from the U.S. Department of Energy Standard Evaluation
Techniques except<SPAN class=467101717-08022008> </SPAN>changed to 0% when
occupancy is 0%. These values may be used only if actual schedules are not
known.</EM></FONT></P>
<P align=left><SPAN class=467101717-08022008><FONT face=Arial color=#0000ff
size=2>Also, ASHRAE 90.1-2004 Appendix G lets you take advantage of both
improving the efficiency of the water heating equipment and reducing the hot
water demand (I think this was in one of the addenda). To be honest, usually I
just use the default domestic hot water demand schedules and capacities within
eQUEST for the building type I am modeling, and then apply the hot water heater
efficiency to that.</FONT></SPAN></P>
<P align=left><SPAN class=467101717-08022008><FONT face=Arial color=#0000ff
size=2>Hope this helps,</FONT></SPAN></P>
<P align=left><SPAN class=467101717-08022008><FONT face=Arial color=#0000ff
size=2>Nathan Miller<BR>Stantec</FONT></SPAN></P></SPAN></DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> bldg-sim-bounces@lists.onebuilding.org
[mailto:bldg-sim-bounces@lists.onebuilding.org] <B>On Behalf Of </B>Varkie
Thomas<BR><B>Sent:</B> Friday, February 08, 2008 9:10 AM<BR><B>To:</B>
bldg-sim@lists.onebuilding.org<BR><B>Subject:</B> [Bldg-sim] Middle School - DHW
& Ventilation<BR></FONT><BR></DIV>
<DIV></DIV>
<P>The Middle School in question has 170,000 sqft and about 2000
students. It has science labs, cafeteria, gymnasium, toilets
and showers besides, classrooms, offices, library and computer labs.
I am looking for design criteria and schedules. Is there published
information, examples or case studies for estimating Domestic Hot
Water and Ventilation requirements? What are the options for saving energy
in these two cases based on ASHRAE Std90? I presently
model occupancy-based-sensors by adjusting the design ventilation schedule
by the occupancy schedule. Can you reduce the ventilation rates if carbon
and ionization filters are used? What are the drawbacks?</P>
<P>Varkie</P></BODY></HTML>