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<P><FONT FACE="Times New Roman">Modeling multi family residential in Canada.</FONT>
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<P><FONT SIZE=2 FACE="Arial">1. Part of the first floor is below grade.<BR>
a. Does the model need to be adjusted for weaknesses in the DOE analysis method?<BR>
b. I’ve reviewed a report dated Oct 2003 that says that there is an ‘anomaly’ in the way that DOE2 calculates heat loss to the ground. The report says that DOE2 overestimates heat loss to ground.<BR>
Is the anomaly still there, or has it been corrected? </FONT>
<BR><FONT SIZE=2 FACE="Arial"> c. The report suggests that the correction be to increase the resistance of the floors/walls that are in contact with ground. Is that right? By how much?</FONT></P>
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<P><FONT SIZE=2 FACE="Arial">2. The energy efficiency (EE) program we’re evaluating works to eliminate thermal bridges, where possible, in the building construction. (i.e. balconies outside of apartments)</FONT></P>
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<P><FONT SIZE=2 FACE="Arial">a. How do I model a building with balconies but no thermal bridges in the EE case?</FONT>
<BR><FONT SIZE=2 FACE="Arial">b. How do I add them in the baseline case?</FONT>
<BR><FONT SIZE=2 FACE="Arial">c. Another report models a ‘composite’ thermal resistance for walls that accounts for the studs vs. the insulation in the wall construction to account for the thermal bridges created by the wall studs. Is that the correct way to do things?</FONT></P>
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<P><FONT SIZE=2 FACE="Arial">1) How do I convert blower door test results at 50 Pa to natural infiltration?</FONT>
<BR><FONT SIZE=2 FACE="Arial">a. Rule of thumb seems to be divide by 20</FONT>
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<P><FONT SIZE=2 FACE="Arial">b. </FONT> <FONT SIZE=2 FACE="Arial">LBL method uses a factor N = C x H x S x L. C, H, S, L based on climate, building height, leak shape, and wind shielding. I cannot know leak shape and I do not know wind shielding. Is there a way to determine ‘standard’ values for these factors an still allow me to use building height and climate to adjust for the N factor?</FONT></P>
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<P><FONT SIZE=2 FACE="Arial">2) Most thermostats in Canada are bimetallic. The program requires electronic thermostats. The consensus is that the electronic thermostats are able to hold the temperature more precisely than the bimetallic thermostats.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">a. Assumption is that the ‘comfort’ temp is the lowest temp reached before the heating system is activated. If bimetallic is set pt temp +- 2F, and the ‘comfort’ temp is 70F, then the bimetallic thermostat will be set at 72F to make sure the temperature is always above comfort temp. If the electronic thermostat is set pt temp +- 1F, then the electronic thermostat will be set at 71F. Another report modeled this by changing the set point temperature by 1F to account for the presence of the electronic vs. bimetallic thermostat.</FONT></P>
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<P><FONT SIZE=2 FACE="Arial">b. </FONT> <FONT SIZE=2 FACE="Arial">Is there a way to model this in DOE2 (eQUEST) that recognizes bimetallic vs. electronic thermostats?</FONT>
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<P><FONT SIZE=2 FACE="Arial">3) The current simulation only allows me to model the water heater outside of the heated living space. However, the water heaters are located in the apartment and therefore contribute to the thermal equation.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">a. How do I model the water heater in the apartment?</FONT>
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<P><FONT SIZE=2 FACE="Arial">b. </FONT> <FONT SIZE=2 FACE="Arial">The water heaters are supposed to have insulated pipes for the first 10 feet. How do I model that?</FONT>
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<P><FONT SIZE=2 FACE="Arial">4) All units are ventilated with outside air. The EE program requires them to have heat recovery on their ventilation systems.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">a. Are fan schedules equal to the ventilation schedule if the heat system is electric baseboard?</FONT>
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<P><FONT SIZE=2 FACE="Arial">b. </FONT> <FONT SIZE=2 FACE="Arial">How do I simulate the heat recovery efficiency? I know the efficiency at -25 degrees C only. Can I model the entire system off that one point?</FONT></P>
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<P><FONT SIZE=2 FACE="Arial">5) How do I model a ventilation system controlled by a humidistat? It seems to me that it would be based on behavior patterns – when showers are taken, how long, cooking practices, etc. Even if I know those things, how do I translate them into a ventilation schedule – both cfm and how long the system is run?</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Thanks for any input. Jessica</FONT>
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