Epson Projectors: The "Greener" Choice

If your school district or university selected Epson projectors in the last three years, you made a “greener” choice because you didn’t contribute to the 2.3 million extra Kilowatt hours of electricity that comparative models consumed…and that’s the equivalent of 191,260 gallons of gas used¹ or 3.9 million miles traveled in a car² or 1,685³ tons of CO2. You would need to plant 43,205 trees and let them live for 10 years⁴ to offset this CO2 footprint. Epson projectors perform with remarkable colour clarity, quality, and efficiency…and yes, they’re a “greener” choice for your learning environment.

A Closer Look at the Data

How were these numbers calculated?

For this analysis, the number of specific projector models (see chart to the right) sold from January 2006 through December 2008, was obtained from NPD. These particular projectors were selected for comparison since they were from several of the top-selling projector manufacturers and their features closely compared to the best-selling Epson projectors sold to the K-12 education market.

The Power Consumption kilowatts was obtained from each vendor’s specification sheets for each model. To calculate the yearly power consumed, each model’s power consumption value was multiplied by the following factors:

• 5 hours a day that the projector is most likely running in the classroom
• 21 days a month to average the number of school days a month
• 10 months a year to average the number of months of school a year
• 1/1000 to get kilowatts from the wattage

(Note: Standby mode was not used because some manufactures do not disclose their standby power consumption specification.)

The Extra kilowatt hours of electricity was calculated by taking the difference between the kilowatts used for the competitive models and the Epson projectors listed above over the three years period.

To calculate the cost of the power consumed, a value of $0.16 was used for the average electricity cost per hour in the United States. This could be different in your region. The same time periods as listed above were used in this calculation.

To calculate the conversions, the Kilowatt-hours were entered into the
Greenhouse Gas Equivalency Calculator at:
http://www.epa.gov/cleanenergy/energy-resources/calculator.html

To calculate the 3,862,500 miles driven, the number of cars driven (from the above Web site) was multiplied by the 12,500 miles a year driven annually according to EPA and can be found at: http://www.epa.gov/oms/consumer/f00013.htm

Note: These calculations as of April 1, 2009
¹http://www.epa.gov/cleanenergy/energy-resources/calculator.html
²http://www.epa.gov/oms/consumer/f00013.htm
³http://www.epa.gov/cleanenergy/energy-resources/calculator.html
⁴http://www.epa.gov/cleanenergy/energy-resources/calculator.html