This data is a comparison reading conducted by Site Controls monitor system, it measured 12 hours of energy usage at a Convenience Store that has a walk-in cooler with 12 Evaporator Fan motors and 17 Glass Doors with heaters:

• 06/26/07— Started with No Energy Saving Technology installed.  

• 06/28/07— Installed Frigitek Evap Fan Motor Controller.  

• 06/29/07— Installed Altech Door Heater Controller.  

• 06/30/07— First Look With Both Controllers installed.  

• 07/09/07— Second Look with Both Controllers installed.

Energy Savings Calculation:

   6/26/07 (982) - 7/9/07 (914) = 68kwh Savings per 12hr

   (68kwh) x 2 x Energy Rate ($0.10) = $13.60 daily

$413.60 Monthly Savings (estimated)

Return On Investment:

Now that we know how much money this store is saving and still enjoying comparable performance from their refrigeration, lets determine what their return on investment (ROI).
 

 Cost ($3,500) ÷ Monthly Energy Savings ($413.60) = 8mths

 8 Months ROI (Return Of Investment)

Above energy savings is based upon measurement and calculations performed in a joint research by a major utility company at their refrigeration test center in California and Portland Energy Conversation, Inc.  Actual results of savings may vary.