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CENTURY CENTER -AHU- 2,3,4,5 & 6 Supply& Exhaust Fans <br />Install variable speed drives on AHU Fans: <br />190 ...TOTAL VAV FAN HORSEPOWER ( FANHP) <br />70.0% ...COMBINED LOADING PERCENT OF ALL SUPPLY/RETURN FAN MOTORS (FANLOAC <br />65.0% ...COMBINED EFFICIENCY OF ALL SUPPLY /RETURN FAN MOTORS (FANEFF) <br />1 ...CURRENT VOLUME CONTROL (1 =CV, 2 =DD, 3 =IV) <br />5$24- ...TOTAL FAN RUNTIME HOURS (FANHRS) = HVACHRS`WPY <br />10% ...PERCENT OF HOURS OPERATION AT 100% (100 %HRS) <br />30% .,.PERCENT OF HOURS OPERATION AT 90 % (90 %HRS) <br />20% ... PERCENT OF HOURS OPERATION AT 80% (80%HRS) <br />20% ... PERCENT OF HOURS OPERATION AT 70% (70%HRS) <br />15% ...PERCENT OF HOURS OPERATION AT 60% (60 %HRS) <br />5% ...PERCENT OF HOURS OPERATION AT 50% (50 %HRS) <br />100% ...SUM OF PERCENT OF HOURS OPERATION <br />(Current) ( FANHP/ MOTOREFF'. 746KW/ HP)' FANLOAD '((FAN100'(100 %HRS'FANHRS))+ <br />(FAN90' (90 %HRS' FANHRS)) +(FAN80' (80 %HRS' FANHRS)) + <br />(FAN70' (70 %HRS' FANHRS)) +(FAN60' (60 %HRS' FANHRS))+ <br />(FAN50 -(50% HRS 'FANHRS)))__ _________________: 685,060 KWH <br />(Retrofit) (FANHP /MOTOREFF' .746 KW/HP)' FANLOAD' ((1.0' (100 %HRS' FANHRS))+ <br />(.82' (90 %HRS' FANHRS)) +(.65' (80 %HRS ` FANHRS)) + <br />(.51 ' (70 %HRS `FANHRS)) +(.38' (60 %HRS' FANHRS)) + <br />(.27'(50% HRS* FANHRS)))__ _______ _____________ 440,862 KWH <br />244,198 KWH <br />102 <br />