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Actual Saving Calculations
Emory P.E. Building AHU # 7

44,162 cfm
  New cfm Rating
38,311 cfm
  Original cfm Rating
5,851 cfm
  Effective cfm Gain
÷400 cfm
  400 cfm/ton
14.63
  Effective Tonnage Gain
X .67
  Chiller kw/ton Rating
9.8
X 24
  Hours
235
X 365
  Days
85,775
X 0.055
  Price per kw
$4,718.00
  Annual Savings
$6,300.00
  Project Cost
÷ $393.00
  Monthly Savings
16
  Months Return on Investment (ROI)

Typical Saving Calculations

44,162 cfm
  New cfm Rating
38,311 cfm
  Original cfm Rating
5,851 cfm
  Effective cfm Gain
÷400 cfm
  400 cfm/ton
14.63
  Effective Tonnage Gain
X 1.0
  Chiller kw/ton Rating
14.63
X 24
  Hours
351
X 365
  Days
128,115
X 0.055
  Price per kw
$7,046.00
  Annual Savings
2 men X 8 hours X $35.00 X 2 coil cleanings =
$1,120.00
  Labor Savings
$6,300.00
  Project Cost
÷ $681.00
  Monthly Savings (Energy & Labor)
9.25
  Months Return on Investment (ROI)

*Typical Chiller has 0.9 to 1.2 kw/ton Rating

 


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