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Item 1 - the ESAF's are used in defining the reference building
envelope parameters -- that is why you must define the primary
heating source for each zone. In practise, you just use the energy
consumption & costs from EE4 to populate the LEED Canada letter
template. The ESAF's are not used in the EA-Cr 1 or EA Pr 2
calculations.<br>
<br>
Item 2 - your interpretation is not correct. There is a document
called the Performance Compliance for Buildings which defines the
reference building (automatically generated by EE4). Roughly
translated, the reference building has a single 80% efficient boiler
(if you have hydronic heating in the proposed building, it has 1 or
2 chillers (2 if your plant exceeds 700 tons) with a COP of 5.2.
There are 3 reference building types -- single zone, residential
(hotels, dorms etc) ... and everything else which has a VAV
reference system type. <br>
<br>
The MNECB is and old code very easy to beat. Standard design should
be 25% better than the MNECB (due mainly to lighting). Good HVAC
design (e.g. condensing boilers, dedicated OA systems and
ventilation heat recovery) can put you 50 to 60% better than the
MNECB. (My office is in a building >75% better than the MNECB,
but that is another story).<br>
<br>
<br>
<br>
On 10/10/2011 3:11 PM, Anne M. Moellenberndt wrote:
<blockquote
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<p class="MsoNormal">I’m looking for some feedback from anyone
who has used EE4 and/or modeled a building against the MNECB
1997 in Canada.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="mso-list:Ignore">1.<span style="font:7.0pt
"Times New Roman""> </span></span><!--[endif]-->How
are the Energy Source Adjustment Factors used when modeling a
building for LEED against the MNECB? It appears that these
factors are meant to be multiplied by the total energy cost
from each type of use. I see that at least in LEED Canada NC
1.0/1.1, the calculations for EQ p2 require 25% improvement in
energy consumption (not cost) over MNECB. Presumably this
requires use of the ESAF in that calculation. However, LEED
also requires that calculations for energy savings are based
on energy cost. When calculating energy costs, do you have to
use the ESAF as well as the different utility rates? Or do you
use the actual consumption (without using the ESAF) to figure
the cost?<o:p></o:p></p>
<p class="MsoListParagraph"
style="text-indent:-.25in;mso-list:l0 level1 lfo1"><!--[if !supportLists]--><span
style="mso-list:Ignore">2.<span style="font:7.0pt
"Times New Roman""> </span></span><!--[endif]-->The
code appears to require use of baseline systems that
completely mirror the proposed systems – boiler for boiler,
chiller for chiller, multi-zone for multi-zone. How have
others found ways to show significant energy savings given
this constraint? The newer versions of ASHRAE allow
comparison of a proposed ground-source heat pump system, for
example, against a boiler heating baseline system, or a VAV
system against a packaged system, depending on various
factors. But the MNECB and ASHRAE 90.1-1999 don’t allow
this. I am struggling to see how it would be possible to get
more than 20-30% savings given these rules. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><b><span style="font-family:"Times New
Roman","serif";color:#696EB4">Anne Marie
Moellenberndt </span></b><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif";color:#595959">PE LEED AP</span><b><span
style="font-family:"Times New
Roman","serif";color:#696EB4"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span
style="font-size:10.0pt;font-family:"Times New
Roman","serif";color:#595959">Senior
Mechanical Engineer <o:p></o:p></span></p>
<p class="MsoNormal"><span
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Roman","serif";color:#595959"><o:p> </o:p></span></p>
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