Putting Energy Hogs in the Home on a Strict Low-Power Diet

I THOUGHT I was pretty good about energy conservation, but it turns out that I’ve been a bit of a hypocrite. I drive a reasonably fuel-efficient car, I work at home so I don’t use fuel to commute and I am replacing incandescent bulbs in my home with energy-efficient fluorescent bulbs.
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Enlarge This Image Bruce MacPherson
But I am also a prodigious computer user, and it looks as if that makes me an energy hog. I started checking how much electricity my electronics were consuming when I wasn’t using them. I used a Kill A Watt EZ energy meter (available online for about $25) and began measuring. My PC was continuously drawing 134 watts all night.
The more devices I checked, the worse it got. My TiVo digital video recorder was sucking down about 30 watts when it was not playing or recording a show. A Comcast digital cable set-top box made by Motorola that I tested was drawing about 40 watts. My DVD player was drawing 26 watts while idle, and my audio system — which I rarely turned off — was using 47 watts. This was in addition to the numerous power adapters and chargers, each drawing 1 or 2 watts, not to mention several other devices sipping energy to keep clocks running or to be ready to turn on at the push of a button.
I’m partly to blame for the audio system and DVD player. They do have on/off switches that I was failing to use. I had falsely assumed they were using relatively little power. But I tested DVR’s from Comcast, Dish Network and TiVo, and none went into a low-power mode. All of this wasted power was costing me money and pumping unnecessary CO2 into the atmosphere. My PC alone was contributing 2,000 pounds of CO2 annually. The DVR. was adding another 543 pounds.
Indeed, the Department of Energy estimates that in the average home, 40 percent of all electricity used to power home electronics is consumed while the products are turned off. Add that all up, and it equals the annual output of 17 power plants, the government says. In an effort to address that, a consortium of Intel, Google, PC makers and other technology companies this week announced their intent to increase the PC’s overall energy efficiency to 90 percent.
Products that idle in what the industry calls low-power mode, or lopomo, consumed about 10 percent of total electricity in California homes, according to a 2002 study prepared for the California Energy Commission by the Lawrence Berkeley National Laboratory. A few of those devices, even those with Energy Star ratings that signal that they are less wasteful, still use a lot of power. “Some of the larger big-screen TVs consume as much energy each year as a new refrigerator,” according to Noah Horowitz, a scientist at the Natural Resources Defense Council.