So the overall efficiency of an automotive gas engine is about 20 percent.

However, there are four main components which govern the overall efficiency of the system.

All three elements have a significant effect upon the overall efficiency of any maintenance operation.

This technology is able to increase overall efficiency through the entire packaging operation.

That gives an overall efficiency of about 64 percent.

This gives an overall efficiency of about 72 percent.

They must be judged with the overall efficiency and cost of the device.

Not when the overall efficiency of such a process is maybe 50%.

There can also be a considerable variation in the overall efficiency of each type.

Switching off when not needed, as at night, would save some energy and improve overall efficiency.