4. When should I consider buying an energy-efficient motor?
Energy-efficient motors should be considered in the following circumstances:
• For all new installations
• When purchasing equipment packages, such as compressors, HVAC systems, and pumps
• When major modifications are made to facilities or processes
• Instead of rewinding older, standard efficiency units
• To replace oversized and underloaded motors
• As part of a preventive maintenance or energy conservation program.
The cost effectiveness of an energy-efficient motor in a specific situation depends on several factors, including motor price, efficiency rating, annual hours of use, energy rates, costs of installation and downtime, your firm’s payback criteria, and the availability of utility rebates. Check with your utility to determine whether it can fund a portion of your motor replacement costs through its energy conservation programs. Question 5 addresses methods for evaluating the cost effectiveness of energy-efficient motors.
to be continued...............
Source : Fact Sheet - US Department of Energy
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