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Stealth Home Energy Hogs
by William Pentland
Thursday, September 8, 2011
The
relentless rise of electricity
prices over the past decade has made many consumers more conscientious
about
how they use electric power. Many of those conscientious people may
find it
frustrating — to put it mildly — that their daily or even hourly
efforts to
turn off devices they’re not using hasn’t delivered the results they’d
expected.
The
blame belongs to the growing
number of “vampire” or “phantom” electronic products that populate
today’s
typical home. An alarmingly large number of electrical products cannot
be truly
turned off without being unplugged. These ‘vampire’ products draw power
24
hours a day whether “on” or “off.”
These
devices draw so-called standby
power when they are off, according to the Lawrence Berkeley National
Laboratory
(LBNL), which has recently completed a large survey that measured the
“standby
power” in hundreds of products.
So
what is “standby power”?
...standby
power is electricity used
by appliances and equipment while they are switched off or not
performing their
primary function. That power is consumed by power supplies (the black
cubes—sometimes called “vampires”—converting AC into DC), the circuits
and sensors
needed to receive a remote signal, soft keypads and displays including
miscellaneous LED status lights. Standby power use is also caused by
circuits
that continue to be energized even when the device is “off.”
Based
on LBNL’s those results, Clean
Beta created the following list of 26 electrical products that consume
the most
juice while they’re “off.” More specifically, the list ranks the most
profligate electrical products based on the average number of watts
they
consume in “off” mode.
A
watt is a measure of power —
Joules/second — analogous to speed — miles/hour. So, to calculate
watts, power
must be converted into energy (like speed into distance). Here’s an
example: if
a device draws 1 watt constantly for a year, then its energy
consumption was 9 kWh.
That corresponds to about $1.00.
While
a single device consumes very
little in annual electricity use, when multiplied by several dozen
products,
you’re no longer talking about chump change.
An
individual product draws relatively
little standby power, but a typical U.S. home has forty products
constantly
drawing power. Together these amount to almost 10% of residential
electricity
use. Altogether, standby power use is roughly responsible for 1% of
global CO2
emissions.
What
can you do? It is not easy to
reduce the amount of standby power many devices use, but it is
possible. In
fact, research has found that an aggressive effort can reduce standby
use by
about 30%.
Here
are a few strategies:
Use
a switchable power strip to pull
the plug on clusters of computer or video products.
Buy
low standby products if you can
find them. Don’t ask a salesperson though because they probably won’t
know.
Better to look for ENERGY STAR products, which are tested for
profligate
reliance on standby power.
Buy
a low-cost watt-meter, measure the
devices in your home and take targeted action.
If
all else fails, pull the plug, but
be careful not to get electrocuted in the process.
Here
are the top 10 energy that
consume the most energy.
No.1.
Photo: Business WireNo. Set-Top
Box*
Average Watts While Off: 28.286
Average Watts While On: 30.198
*Average includes DVR, digital cable,
digital cable with DVR, satellite, satellite with DVR.
No.
2: Notebook Computer
Average Watts While Off: 8.90
Average Watts While On: 29.48
N0.
3 Photo: WikipediaNo. 3:
Inkjet/Multifunction Fax
Average Watts While Off: 5.31/5.26
Average Watts While On: 6.22/9.16
No.
4: DVD/VCR
Average Watts While Off: 5.04
Average Watts While On: 13.51
No. 5
Photo: WikipediaNo.: VCR
Average Watts While Off: 4.68
Average Watts While On: 7.77
No.
6: Central Heating Furnace
Average Watts While Off: 4.21
Average Watts While On: 339.71
No.
7 Photo: WikipediaNo. Cable Modem
Average Watts While Off: 3.84
Average Watts While On: 6.25
No.
8: Multi-Function Laser Device
Average Watts While Off: 3.12
Average Watts While On: 46.98
No.
9 Photo: AP Cordless Phone With
Answering Machine
Average Watts While Off: 2.92
Average Watts While On: 3.53
No.
10: Desktop Computer
Average Watts While Off: 2.84
Average Watts While On: 73.97
Read
the story and see the Full List
of the Top 26 Home Energy Hogs at Yahoo Finance
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