<BODY><P>How is the Zone-Fan-Ratio (ZFR) determined for Fan Powered Terminal Boxes? In eQUEST the default for Series FPB is 1.0 and for Parallel it is 0.5. The definition in the DOE2.2 manual is:</P>
<P>ZFR * Primary CFM = FPB Supply CFM</P>
<P>In the case of a UFAD system with Parallel FPBs the Primary Air Temp is 48F, the FPB Supply Air Temp = 65F and Recirculation Air Temp is 78F. What is the ZFR? An increase in ZFR should reduce the energy use?</P>
<P>How would you account for the energy savings using ECM motors. One suggestion is to reduce the energy use of the fans in PIU boxes by 25%. The default KW/CFM in eQUEST is 0.00033 kw/cfm. Reduce this by 25%?</P><PRE>
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