1.  Automakers that once concentrated on building leaner, more efficient models have instead been adding the muscle that customers crave.

2.  Even if your water heater is not leaking, you might want to replace it to get a more efficient model or to increase its size.

3.  Hurdle, for instance, recently upgraded hers to a more efficient model with zone control.

4.  More efficient models cost more up front so paying off the initial cost takes longer, but the overall return is greater.

5.  Some efficient models are already in use, and they will begin carrying the Energy Star label right away.

6.  Energy experts note that homeowners can make the biggest dent in their power bills by switching to more efficient models of major appliances.

7.  My concept is a very efficient model.

8.  Once the study is completed the association will urge trappers to use the most efficient models that cause the least pain.

9.  The higher cost of the more efficient models would have precluded many homeowners from buying them, it said.