<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:10pt"><div>Brad:<br><br>Please see attachment. It is a excerpt from 90.1-2010 that clarifies the definition of an unmet load hour.<br><br>If the 250 unmet hours in each zone occur at the same time, you would have only 250 unmet hours.<br><br>Paul Diglio<br></div><div style="font-family: times new roman,new york,times,serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> "Patrick J. O'Leary, Jr." <poleary1969@gmail.com><br><b><span style="font-weight: bold;">To:</span></b> Brad Robinson <brad.robinson@yahoo.com><br><b><span style="font-weight: bold;">Cc:</span></b> "equest-users@lists.onebuilding.org"
<equest-users@lists.onebuilding.org><br><b><span style="font-weight: bold;">Sent:</span></b> Thu, July 7, 2011 10:56:08 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: [Equest-users] Unmet Hours<br></font><br>
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that would be 500 unmet hours.<br>
<br>
the bigger leed review problem i've had is when i have more unmet hours
in one category in the proposed (like 200 unmet in cooling) and fewer
unmet hours in the other (like 0 in heating) but the baseline is
opposite. certain leed reviewers think this is a problem. the 90.1
requirement addresses the unmet hours per the entire building design
(both heating and cooling) not heating and cooling individually.<br>
<br>
On 7/7/11 7:49 AM, Brad Robinson wrote:
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<div>For LEED compliance under ASHRAE 90.1, are the 300 unmet hours
the sum of all the unmet hours in each zone, or the peak per zone? In
other words if I have 250 unmet hours in one zone and 250 unmet hours
in another zone, does this comply, or is it considered 500 unmet hours
total? By zones, I mean thermal zones served by the same air handling
unit. Thanks.<br>
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<div>Brad Robinson</div>
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