Adventures in Office Greening, Vol 1, Issue 10
Here is what I found on phantom energy use, which is caused by appliances that consume power even when they are turned “off”:
There is a device called the Kill-A-Watt that measures the rate of electricity consumption by various devices. This device was used to test common “vampire” appliances that continue to suck energy when they are turned off.
For reference, an average compact fluorescent light bulb uses around 11 W. Watts are a measure of the rate of energy consumption. The standard unit for total quantity of consumption is kW-hr. For example, if an 11-W bulb burned for 2 hours, it would consume 0.022 kW-hrs of energy.
1. Cell phones and other small electronic device chargers = 1.2-2.4 W
2. Computer = 7 W
3. TV/VCR unit = 5 W
4. Microwave oven = 1.2 W
1 kilowatt-hour = 1.0 lb of coal, 0.40 lb of natural gas, or 0.58 lb of oil.
We are not in the office for ~120 hrs/wk, and there are ~20 people in the office.
Vampire consumption when “off”, but not unplugged, of computers in this office results the consumption of 885 lbs of coal or 355 lbs of natural gas every year.
Turning off your power strip at the end of each work day.