What are the most energy-efficient microprocessors currently available in mass-market PCs/laptops? [more inside]
posted on Apr 12, 2007 - 5 answers

What form of energy is used to heat a Wal-Mart, Home Depot or Costo store, and how much does it cost per month in the winter? [more inside]
posted on Apr 8, 2007 - 12 answers

Does leaving a pizza stone in the oven make the oven more or less efficient? [more inside]
posted on Mar 23, 2007 - 15 answers

Are Daikin mini-split air conditioners really more efficient? I live in Puerto Rico where most houses are cement and central air is pretty much out of the questions. Average temperature is 92F. [more inside]
posted on Sep 25, 2005 - 1 answers

How energy (in)efficient is my gas fireplace? [more inside]
posted on Sep 19, 2005 - 4 answers

MefiEngineers: Shouldn't there be a simpler solution to hybrid vehicles? [more inside]
posted on Sep 12, 2005 - 20 answers

Is there anything wrong with moving my refrigerator right next to my stove? Gas stove, small kitchen, empty space between the stove and fridge. Will pushing them together affect the performance of either one? Mostly I just don't want proximity to the the stove to make the refrigerator work harder.
posted on Sep 6, 2004 - 12 answers