402DRVR,

No Efficiency and Conservation are not the same. They cannot be used interchangeably.

Efficiency- Means receiving the same results by the use of technology that requires less energy to perform the same service or function resulting in the same lifestyle.

Conservation- Is often mandated from governments and "do gooders" that leads to going without something. This is an all time favorite code word of the socialist governments in Europe.

EAHINC