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<P><FONT SIZE=2 FACE="Arial">I am modeling an apartment style dormitory for a project in Atlanta, GA. Each of the 45 units is served by its own heat pump, along with a few zones for public areas. For an energy efficiency grant application I have compared the designed system, a ground source heat pump, with an air source heat pump prescribed by 90.1. Other than the systems, the models are identical. </FONT></P>
<P><FONT SIZE=2 FACE="Arial">The energy use for space cooling is significantly higher for the GSHP system (24,000 kWh vs. 17,000 kWh). Because the power required to run pumps offsets the savings in heating energy, this destroys the rationale for spending the extra money on the Ground Source Heat Pump, as well as our chances of receiving the grant.</FONT></P>
<P><FONT SIZE=2 FACE="Arial">Has any one encountered this issue? </FONT>
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<P><FONT SIZE=2 FACE="Arial">Thanks</FONT>
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<P><FONT SIZE=2 FACE="Arial">tb </FONT>
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<P><B><FONT COLOR="#000000" FACE="Garamond">Thomas Butler,</FONT></B> <FONT COLOR="#000000" FACE="Garamond">LEED AP</FONT><B> </B>
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