Standby power in the home
A few months ago I was visiting our local library, when I noticed some interesting kits behind the the desk. They turned out to be “Home Energy Action Toolkits” (which has an acronym of HEAT!). I put my name down on the list, and finally last week it was my turn to borrow one of the kits.
They include the following items:
- Power-mate power meter
- Infrared thermometer
- Stop watch
I was primarily interesting in using the power meter to gauge how much power various appliances use in our home.
Here’s what I discovered:
|Appliance||Standby (Watts)||On (Watts)|
|2400 W Heater||1.3||960/1370/2210 (low/med/high)|
|CD Cassette Radio 1||5.3||8.5/6.5/6.3 (Cd/Tape/Radio)|
|CD Cassette Radio 2||4.0||5.9/5.3 (Tape/Radio)|
|Computer + CRT Monitor||8.5||160|
|Small CRT TV||n/a||44|
|1000 W Heater||n/a||960|
|Camera battery charger||0.4|
|Automatic garage roller door||10.4||100|
|Mobile phone charger||0.2|
Two other appliances were also measured, using a feature of the power meter which calculates running costs by allowing you to enter in the cost per kilowatt hour (I used 17.99 cents). The results were very interesting:
|Dishwasher||14.44 cents per standard cycle|
|Bread machine||8.3 cents to make 1.25Kg loaf|
So it probably is cheaper to make your own bread after all.
As a family we’re not too bad at turning off things that we’re not using. We’ve also started the move to compact fluorescent lights, and I intend to make use of a service like Envirosaver, which will come out and replace all your incandescent bulbs with CF ones for free.