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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Loren,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>One of the notes under Table G3.1.1A of
ASHRAE 90.1-2004 states, “Residential building types include dormitory,
hotel, motel, and multifamily. Residential space types include guest rooms,
living quarters, private living space, and sleeping quarters. Other building
and space types are considered nonresidential.” The User’s Manual
also says, “If a building has both residential and nonresidential spaces,
for instance a residential tower with retail and restaurants at the base, then
the HVAC system type is determined separately for the residential and
nonresidential portions.”<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I recently did an energy model for a motel
that had first floor retail spaces, a swimming pool, an indoor parking garage,
and a fairly large lobby. I used realistic systems for these spaces instead of
PTACs or PTHPs. For a different motel I modeled, the nonresidential spaces were
rather insignificant, so I used PTHPs throughout.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Regarding which capacity to use for the
EER calculation, I would use realistic capacities. For example, for the space
that needs 40 kBTU/h, I would assume that there would be two 20 kBTU/h units
and use 20 kBTU/h for the capacity in the EER equation.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I think the decision to use an average EER
for all the units is a judgment call depending on how complex you want your
model to be. It’s the usual trade-off between making assumptions to
simplify the model or adding complexity to get more accuracy (presumably).<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>Sincerely,<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>Keith Swartz, PE, LEED® AP<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><ns0:PlaceName w:insAuthor="Keith Swartz"
w:insDate="2008-03-10T09:03:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2008-03-10T09:03:00Z"><st1:PlaceName w:st="on"><font color=navy><span
style='color:navy'>Energy</span></font></st1:PlaceName></ns0:PlaceName><font
color=navy><span style='color:navy'> </span></font><ns0:PlaceType
w:insAuthor="Keith Swartz" w:insDate="2008-03-10T09:03:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2008-03-10T09:03:00Z"><st1:PlaceType
w:st="on"><font color=navy><span style='color:navy'>Center</span></font></st1:PlaceType></ns0:PlaceType><font
color=navy><span style='color:navy'> of </span></font><ns0:place
w:insAuthor="Keith Swartz" w:insDate="2008-03-10T09:03:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2008-03-10T09:03:00Z"><ns0:State
w:insAuthor="Keith Swartz" w:insDate="2008-03-10T09:03:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2008-03-10T09:03:00Z"><st1:State
w:st="on"><st1:place w:st="on"><font color=navy><span style='color:navy'>Wisconsin</span></font></st1:place></st1:State></ns0:State></ns0:place><font
color=navy><span style='color:navy'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><ns0:Street w:insAuthor="Keith Swartz"
w:insDate="2008-03-10T09:03:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2008-03-10T09:03:00Z"><ns0:address w:insAuthor="Keith Swartz"
w:insDate="2008-03-10T09:03:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2008-03-10T09:03:00Z"><st1:Street w:st="on"><st1:address w:st="on"><font
color=navy><span style='color:navy'>455 Science Drive</span></font></st1:address></st1:Street></ns0:address></ns0:Street><font
color=navy><span style='color:navy'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><ns0:address w:insAuthor="Keith Swartz"
w:insDate="2008-03-10T09:03:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2008-03-10T09:03:00Z"><ns0:Street w:insAuthor="Keith Swartz"
w:insDate="2008-03-10T09:03:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2008-03-10T09:03:00Z"><st1:address w:st="on"><st1:Street w:st="on"><font
color=navy><span style='color:navy'>Suite</span></font></st1:Street></ns0:Street></st1:address><font
color=navy><span style='color:navy'> 200</span></font></ns0:address><font
color=navy><span style='color:navy'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><ns0:place w:insAuthor="Keith Swartz"
w:insDate="2008-03-10T09:03:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2008-03-10T09:03:00Z"><ns0:City w:insAuthor="Keith Swartz"
w:insDate="2008-03-10T09:03:00Z" w:endInsAuthor="Keith Swartz"
w:endInsDate="2008-03-10T09:03:00Z"><font color=navy><span style='color:navy'>Madison</span></font></ns0:City><font
color=navy><span style='color:navy'>, </span></font><ns0:State
w:insAuthor="Keith Swartz" w:insDate="2008-03-10T09:03:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2008-03-10T09:03:00Z"><font
color=navy><span style='color:navy'>WI</span></font></ns0:State><font
color=navy><span style='color:navy'> </span></font><ns0:PostalCode
w:insAuthor="Keith Swartz" w:insDate="2008-03-10T09:03:00Z"
w:endInsAuthor="Keith Swartz" w:endInsDate="2008-03-10T09:03:00Z"><font
color=navy><span style='color:navy'>53711</span></font></ns0:PostalCode></ns0:place><font
color=navy><span style='color:navy'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Phone: 608-238-8276 ext. 123<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Fax: 608-238-0523<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><a href="http://www.ecw.org/">www.ecw.org</a><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The Energy Center of Wisconsin is an
independent, nonprofit organization that seeks solutions to energy challenges.</span></font><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'><o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Loren Appin
[mailto:lorenappin@gmail.com] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Sunday, March 09, 2008 3:31
AM<br>
<b><span style='font-weight:bold'>To:</span></b> bldg-sim@lists.onebuilding.org<br>
<b><span style='font-weight:bold'>Subject:</span></b> [Bldg-sim] Residential or
Nonresidental? And sizing for PTAC units.</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>Hi All,<br>
<br>
I'm modeling a 6 story hotel, and am confused with how I should classify the
building. The hotel is all guest rooms, and is not really mixed
use. So according to ASHRAE this seems that it would fall under the
residential category, and I would be using PTAC or PTHP systems. Under
table G3.1.1A it specifically says hotels are considered residential building
types, not just space types... so I assume I'm correct? However,
would I use a VAV or PSZ system for areas that are not technically guest rooms,
or does this not matter as a hotel is considered a residential "building
type"?<br>
<br>
<br>
Also, when modeling a PTAC system it appears to me that you would get the EER
information from 6.8.1D using the equation, however, sometimes it my system
summary gives me a peak/capacity of a unit as 30KBtu or even 40 for one room
and I know that PTAC units usually don't go much about 20. So would the
equation in this table still hold? Finally, if I am getting varying
capacities for each unit as would be expected, would you suggest taking an
average of all the systems, and then use this capacity as the one to enter into
the equation to get the EER and then apply this EER to all systems across the
board?<br>
<br>
Thanks so much for the help!<br clear=all>
<o:p></o:p></span></font></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
line-height:150%'><b><font size=2 face=Arial><span style='font-size:10.0pt;
line-height:150%;font-family:Arial;font-weight:bold'>Loren Appin</span></font></b><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
line-height:150%'><font size=2 color=green face=Arial><span style='font-size:
10.0pt;line-height:150%;font-family:Arial;color:green'>Energy Engineer</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
line-height:150%'><b><font size=2 color=green face=Arial><span
style='font-size:10.0pt;line-height:150%;font-family:Arial;color:green;
font-weight:bold'>Silpa Inc.</span></font></b><font size=2 color=green
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style='font-size:10.0pt;line-height:150%;font-family:Arial;color:purple'><br>
</span></font><font size=1 color=green face=Helvetica><span style='font-size:
7.5pt;line-height:150%;font-family:Helvetica;color:green'>s i m p l e .
s c i e n t i f i c . s u s t a i n a b l e</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto;
line-height:150%'><font size=1 color=gray face=Arial><span style='font-size:
7.5pt;line-height:150%;font-family:Arial;color:gray'>AMERICAS | MIDDLE EAST | INDIA</span></font><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><font
size=3 face="Times New Roman"><span style='font-size:12.0pt'><a
href="http://www.silpa.com/" target="_blank"><font size=1 color=gray
face=Arial><span style='font-size:7.5pt;font-family:Arial;color:gray'>www.silpa.com</span></font></a></span></font><font
size=1 color=gray face=Arial><span style='font-size:7.5pt;font-family:Arial;
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