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* Savings potential  
 
* Savings potential  
 
* Equipment life
 
* Equipment life
* Payback period
+
* Internal Rate of Return (IRR) and sometimes Payback period
    
Other considerations include the use of fuel and electricity.  Understanding the economic trends of these energy sources can be of great benefit.  For instance, if some equipment type have the capability of multiple fuel usage.  By prioritizing fuel consumption based on off-peak hour usage, savings can be had without the need of retrofit applications.  In situations where the equipment cannot be powered via multiple energy sources, the cost of replacement and/or retrofit must be weighed against the payback period of the device.  Often, cost and energy consumption can be reduced through the simple training of plant operators and the maintenance crew.
 
Other considerations include the use of fuel and electricity.  Understanding the economic trends of these energy sources can be of great benefit.  For instance, if some equipment type have the capability of multiple fuel usage.  By prioritizing fuel consumption based on off-peak hour usage, savings can be had without the need of retrofit applications.  In situations where the equipment cannot be powered via multiple energy sources, the cost of replacement and/or retrofit must be weighed against the payback period of the device.  Often, cost and energy consumption can be reduced through the simple training of plant operators and the maintenance crew.

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