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Appliances Hog More Energy Than High-Tech Gadgets

Carl Bialik from WSJ writes "A tech columnist looked around his home and wondered, 'All these TVs and cable boxes and computers and computer gear and chargers for various adapters have to be sucking up a lot of power, right?' So WSJ.com's Jason Fry bought a power meter to find the biggest power hogs in his home. They weren't his newfangled gadgets: 'The heavily used agglomeration of PC / two monitors / printer / hard drive / speakers in my downstairs study costs a bit more than $10 a month. The PC in our bedroom costs about $6 a month. The upstairs laptop? Less than $1 — a bit more than other always-on gadgets such as the router, cable modem, wireless repeater and Airport Express. So what were our apartment's power hogs? The lights and the dryer. I estimate our lights cost us around $30 a month, nearly a third of that from a chandelier with eight bulbs. Then there's the dryer. I don't know exactly how many watts it uses, but estimate it's costing us at least $25 a month.'"

11 of 688 comments (clear)

  1. Lights? by Quila · · Score: 4, Informative

    Time to get those compact fluorescents. I have them in all but a few of the sockets in my house, and I estimate they save me big $$ given how much we have the lights on (there's almost always someone home, and I'm a night owl).

    1. Re:Lights? by polar+red · · Score: 4, Informative

      fluorescent are being caught up by LED's now.

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    2. Re:Lights? by zxnos · · Score: 4, Informative
      cant do what now?

      also, someone up above made a comment about LED lights and got moderated troll. he is correct, LEDs are the next thing in lighting, as soon as the cost comes down. considerably more efficient than CFs.

      last note. i put CFs in my current house when i moved in 4 years ago. i havent had to replace a single one yet. and i too am a night owl.

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    3. Re:Lights? by GoRK · · Score: 4, Informative

      He was probably modded a troll because he was trolling.

      It is a misconception that LED fixtures are more power efficient than CF or other traditional "hot wire" light sources. Compared to your typical compact fluorescent bulb at the magical "100 watt incandescent" equivalent light output, they are in fact about the same. Fluorescent tubes are quite a bit better.

      http://en.wikipedia.org/wiki/Luminous_efficacy

      There are however some new high-flux LED's in development that are cracking the previous 100 lumen/watt ceiling, but they still have a *long* way to go until they are cost competitive with any other light source.

  2. EIA Residential Energy Statistics are free to all by radl33t · · Score: 5, Informative

    This isn't a suprise at all. Residential energy use is well documented in the EIA's Residential Energy Consumption Survey. The DOE runs these once every 4 or 5 years. Heating > A/C > Lights/Fridge/Cook/Clothes > gadgets.

    Things might change as people consume their 8h/day TV on 60" plasma space heaters.

  3. His guess about the dryer is spot-on by raddan · · Score: 3, Informative

    Our dryer died one day, and since it did not belong to us (it belonged to the landlord; he did not want to fix it; long story), we just left it there and started hanging our clothes instead. We were a little irritated by the inconvenice at first, but after that first electric bill we were sold. $25/mo less per month. I made sure to compare all the transmission/generation charges just to be sure it was all from the dryer.

    Now this was in 2003. We've noticed that the generation charge has been going up, so that, compared to 2003, we are paying roughly $10 more a month for the same number of kWh (roughly 180 kWh/mo). So you'll even save a bit more now.

    Anyhow, that prompted us to walk around and replace all of our lightbulbs with compact fluorescents, and so on (saving us another $10/mo). Considering that none of these bulb have died (save the one that our landlord dropped), I think the $40 or so we put into bulbs has paid us back quite a bit.

    I did the same experiment with the power meter. I was quite surprised to discover that under normal load, my Soekris router consumed less than 1W. Very cool. The same can't be said about the laser printer (LaserJet 4M Plus), though. 700W peak, ~30W at idle. We leave that one off most of the time.

  4. Re:Dual Use Tech by julesh · · Score: 3, Informative

    There's really no other way to cook (if you like to cook) than to use gas stovetop. Electric burners suck....just no heat control there.

    Have you tried an induction cooker? I used to think the same way as you, until I first tried one. To my surprise, it is even more responsive than the gas burner I previously had (I don't know how that works, but it does).

    I've always been curious why more people don't use gas.

    I think safety issues are the prime concern, these days. Cooking on an open flame just seems risky.

  5. Re:Dual Use Tech by Ucklak · · Score: 4, Informative

    Actually it was probably that and the fact that where I lived, the gas companies were de-regulated and that was a clusterF*K of mess right there.

    You had to pay for the use of gas which was cheaper wholesale (which benefited business that pushed for deregulation) but marked up well over the original prices for residential customers and you had to pay for the billing of gas from the gas marketer which was a new charge.
    The deregulation was sold as cheaper gas for all but it ended up costing way more than they imagined, Natural gas prices rose insanely on top of that, and people that couldn't pay for the increase of both had to freeze in the winter.

    http://www.psc.state.ga.us/consumer_corner/cc_gas/ gasderegfaq.asp

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  6. Re:Dual Use Tech by leenks · · Score: 3, Informative

    He was talking about an induction hob - ie there is no element to stay hot. Your gas stove, however, will heat up all the ironwork around the burner that holds your pans in place, so there is still a risk of burning.

  7. Hierarchy is: by Ungrounded+Lightning · · Score: 3, Informative

    The hierarchy of power consumption is:
      - Electric heating (resistive heating: Driers, room heaters, heating appliances.)
      - Motors
      - Lighting
      - Consumer electronics.

    Electric heating (by resisitance heaters) consumes an ENORMOUS amount of power.

    Switching from electric to gas drying (so the electric load is just the motor) will cause a big savings in the electric bill, while the gas bill won't go up anywhere neer enough to compensate. Ditto (even more so) if the house has electric heat.

    Same is true of the other heating appliances (hair driers, toasters, stoves and ovens, etc.) But (except for ovens if you do a LOT of baking) they tend to only run a short time so it doesn't make all THAT much difference on your bill.

    Motors are the next big load. Air conditioners are the worst, due to the heat pump. But moving anything around (even air) is costly. One horsepower is almost exactly 3/4 KW (and motors can be very efficient - 80s to 90s percent - but they're still not lossless). (Nevertheless, using a heat-pump for HEATING - especially if the weather outside is above freezing or so - uses a lot less power than resistive heating. But except for merely cool days it's still more expensive than gas.)

    Lighting is next. Incandescents are especially hot heaters, and the light is the visible part of the hot-wire glow. Much more is heat. Switch to fluorescents (compact or otherwise) and you get about four times as much light per watt. (LEDs may beat that in a few years but right now they're trailing fluorescents.)

    Consumer electronics is 'way down there - because it's improved a lot and because there has been serious effort to increase its efficiency and reduce its losses - as well as to reduce localized heating of the components. (When I got my first linux box it was a good space heater - and most of that was the disk drive. Nowdays things take a LOT less power.) With cheap semiconductors modern power supplies are now highly-efficient switching-mode devices, which also helps a lot.

    (Other appliances have also been re-engineered for efficiency, so switching to a modern large appliance may save you significant power and/or fuel. But electronics has had a much bigger improvement.)

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  8. Re:Dual Use Tech by lucifuge31337 · · Score: 5, Informative

    Safety is definitely the concern with natural gas. My brother is both an EMS first responder and part-time firefighter.

    Blah blah blah. I'm the Fire Marshal of a small town in PA. Most fires (not just in my town) are caused by cooking, and have nothing to do with the fuel used. It has little to do with the exact method of heating, its just that its hot. It's normally because of carelessness (especially including lack of maintenence). This includes crappy old gas stoves with no thermocoulpes that aren't properly mainteined. It includes overloaded elctgrical circuits. It includes filty ranges that have dirt and buildup catch fire during normal usage. It includes imporperly installed applicnces that don't vent correctly. It includes decrepit electrical wiring in the wall supplying a 30 amp 240v circuit.

    Don't kid yourself that gas is a higher risk. Improperly installed, improperly mainteained, and imporperly used are the real risks.

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