“If you cannot measure it, you cannot improve it.”

How much does it cost to leave your TV on all day? What about turning your air conditioning 1 degree cooler? Which uses more power every month — your fridge or your dishwasher? Is your household more or less energy efficient than similar homes in your neighborhood? electricity

Our lack of knowledge about our own energy usage is a huge problem, but also a huge opportunity for us all to save money and fight global warming by reducing our power usage. Studies show that access to your household’s personal energy information is likely to save you between 5–15% on your monthly bill, and the potential impact of large numbers of people achieving similar efficiencies is even more exciting. For every six households that save 10% on electricity, for instance, we reduce carbon emissions as much as taking one conventional car off the road.

Data Sources

Our estimate of the impact of real-time energy feedback on carbon emissions is based on the following sources:

  • Home electricity use: The U. S. Energy Information Administration estimated in 2001 that there were 107 million households in the United States using a total of 1140 terawatt-hours (TWh) per year. That gives an average of 10.6 megawatt-hours (MWh) per year per household.
  • Carbon emissions from residential electricity: According to the U. S. Environmental Protection Agency, the National Average Emissions Rate for 2005 was 712 g CO2 per kilowatt-hour (kWh).
  • Electricity saved with real-time feedback: There have been several studies of feedback’s effects on energy use. Sarah Darby’s review of the literature, The Effectiveness of Feedback on Energy Consumption (pdf) , estimates savings between 5 and 15% from direct feedback.
  • Carbon emissions from cars: Again according to the EPA, a typical car is driven 12,000 miles per year, the average fuel economy of a passenger car is 23.9 miles per gallon, and a gallon of gasoline produces 8.8 kg of CO2.

Based on these figures, we get an average of 7.5 tonnes of CO2 emitted per year per household, and 4.5 tonnes of CO2 emitted per year per conventional car. So, 10% energy savings for 6 households would reduce carbon emissions by about the same amount as taking one conventional car off the road.

Climate Savers

Climate Savers

Energy Saving Tips

Here are some more resources to help you find ways to reduce your energy use.

Heating and Cooling:

Saving Water:

Computing Equipment:

Electronics and Home Appliances:

  • Turn down the brightness on your TV and computer monitor
  • Look for and purchase ENERGY STAR appliances and electronics
  • Consider replacing that old, second refrigerator in the basement – This calculator determines how much energy your refrigerator is using
  • Plug home electronics into a powerstrip and turn off when not in use. Or unplug appliances that you rarely use – when was the last time you used that VCR?
  • Don’t keep your refrigerator and freezer too cold. Set temperature between 36-38 degrees F and freezers at 0-5 degrees.

Other Energy-saving Tips:


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5 thoughts on ““If you cannot measure it, you cannot improve it.”

  1. jaingunjan April 3, 2009 at 2:37 pm Reply

    quite knowledgable..
    glad to see such posts….
    must appreaciate the way u r continuing ur blog after such irksome job…

    • Vishal Jain April 3, 2009 at 5:03 pm Reply

      If we use carefully natural resources that will be better for our future and environment.
      this is the way we can express our self and give and get knowledge.
      Thanks for writing to us….

  2. rajni April 5, 2009 at 9:44 am Reply

    very informative post vishal thx for sharing

    • Vishal Jain April 5, 2009 at 3:54 pm Reply

      Ur Welcome Rajni Ji,
      we should always share information for spreading one to two and more…..

  3. Shahriar Hyder August 25, 2009 at 6:50 am Reply

    Nice post. I have also blogged about saving energy by saving electricity, water and gas at home or offices below:


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