The best energy efficient windows would be those that allow light in but not the warming rays of the sun. Some windows have a reflective coating that keep heat from penetrating.
If you are looking for more information on What are the best energy efficient cars, the best place to find the information is on www.consumerreports.org Best & worst cars review.
Using a more efficient washer and dryer along with an energy efficient dishwasher will save a good amount of money as well as changing to energy efficient bulbs.
The Whirlpool line is the best.
The House Of Anubis
The best energy efficient lights are LED lights. They are very small and use very little electricity, but they are brighter then most conventional lights.
There are no houses in Antarctica to enter into your competition, sorry.
It is very inefficient. The best and most expensive systems are only about 10% efficient.
I had a pacific energy woodstove in my last house and it was the best one I've ever owned, but take a look for yourself.http://www.pacificenergy.net/index.php
EnergySavers.gov has a great list of things you can do to improve energy efficiency. A few of the best ideas are adding insulation, a programmable thermostat, and using energy efficient appliances.
That's means energy. No, 'efficient' means getting the best out of the energy that you are using. Energy in itself can be used efficiently or inefficiently.
Pioneer's systems are for the most part very energy efficient.
houses