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Studies have shown that the addition of motion sensors can reduce the overall annual operating cost by 30 to 50%.  This could potentially save $ 150 per machine per year in electricity.  Popular brands of motion sensors / controllers cost approximately $150, resulting in a payback period of approximately 1.2 to 1.4 years.  <ref> State Energy Office (2005), ''Vending Machines – Utility Savings Initiative (USI) Fact Sheet'', http://www.p2pays.org/energy/Vending.pdf </ref>  
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Studies have shown that the addition of motion sensors can reduce the overall annual operating cost by 30 to 50%.  This could potentially save $ 150 per machine per year in electricity.  Popular brands of motion sensors / controllers cost approximately $200 <ref> Vending Miser (2010), ''Vendingmiserstore.com'', http://www.vendingmiserstore.com/index.php?s=g&gclid=CMflgtqF3J8CFQSbnAod_zDQHA </ref>, resulting in a payback period of approximately 1.5 years.  <ref> State Energy Office (2005), ''Vending Machines – Utility Savings Initiative (USI) Fact Sheet'', http://www.p2pays.org/energy/Vending.pdf </ref>  
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== Emission Reductions ==  
 
== Emission Reductions ==  
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