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Green Computing Thread, Printers left on during holidays and nights/weekends in Technical; HP Laserjet CP3505n uses 42W (or 48W) depending on which stats you read (not tested these). We also have Ricoh ...
  1. #16

    localzuk's Avatar
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    HP Laserjet CP3505n uses 42W (or 48W) depending on which stats you read (not tested these). We also have Ricoh Aficio MP7001 which from testing comes in around 150W. The MPC2800 we have uses about 100W also. When in use, those 2 overload my meter, as they draw so much power.

    Brother HL5250DN - 80W standby (according to specs).

    Epson CX-11 - 51W standby, 18W sleep.

    So, yeah, i'm working from those sort of figures.

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    rh91uk's Avatar
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    I've knocked up a quick script which emails them if they've left their computer logged in and also CC's IT Support. We will then beging to charge them for the amount they have wasted leaving their computer on!

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    Are you sure your measuring the watts in sleep mode on those? They seem incredibly high for the kind of sleeping that my printers do overnight / weekends / holidays.

    My Infotec ISC3030 uses 6.1 watts when it's sleeping and that is roughly the same size MFP as your Ricohs. But yes when it fires up it uses up to 1400 watts.

    Butuz

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    localzuk's Avatar
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    Quote Originally Posted by Butuz View Post
    Are you sure your measuring the watts in sleep mode on those? They seem incredibly high for the kind of sleeping that my printers do overnight / weekends / holidays.

    My Infotec ISC3030 uses 6.1 watts when it's sleeping and that is roughly the same size MFP as your Ricohs. But yes when it fires up it uses up to 1400 watts.
    Yup. Absolutely sure. And as I said, on the others, i've been going by the values in their spec documents.

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    Butuz's Avatar
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    I’m not so sure mate I think your getting standby and sleep confused.

    Standby is what it uses whilst powered on and warmed up i.e when not actually printing or not in sleep mode(eg in between print jobs in an ICT class). Sleep mode is long term power saving mode that usually kicks in after half an hour or so of not being used, for evening / weekend etc and this is the figure you need to use in order to do your evening / weekend electricity cost calculations.

    E.g. you state your Brother HL5250DN uses 80w in standby but again standby is not sleep. According to the specs it uses 9w in Sleep mode, so it's this 9w figure you need to use in your calculations otherwise your costings in your first post will be way off. Same goes for all your other printers/MFP's.

    Hope this helps!

    Butuz

  6. Thanks to Butuz from:

    SimpleSi (23rd February 2011)

  7. #21

    Edu-IT's Avatar
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    08.jpg

    This is what ours show. How do they use electricity when they're off?

    I've knocked up a quick script which emails them if they've left their computer logged in and also CC's IT Support. We will then beging to charge them for the amount they have wasted leaving their computer on!
    Departments being charged?

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    rh91uk's Avatar
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    Yes, Departments will be charged a fine for the wasted electricity from leaving their computers on!

  9. Thanks to rh91uk from:

    Butuz (23rd February 2011)

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    Butuz's Avatar
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    Quote Originally Posted by rh91uk View Post
    Yes, Departments will be charged a fine for the wasted electricity from leaving their computers on!
    I like that one!!!!

    Butuz

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    Quote Originally Posted by Edu-IT View Post
    How do they use electricity when they're off?
    Many devices use small amounts of elecricity when turned off. E.g PC's use some energy to enable wake on LAN functionality and the like. Switching them off at the plug is the only way to ensure 0.0 watts.

    Butuz

  12. #25

    Edu-IT's Avatar
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    Quote Originally Posted by Butuz View Post
    I like that one!!!!

    Butuz
    Sounds an interesting ideas!

  13. #26

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    Quote Originally Posted by rh91uk View Post
    Yes, Departments will be charged a fine for the wasted electricity from leaving their computers on!
    Me thinks the teaching unions will put end to that Rich

  14. #27
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    A local school to us does that one as daily basis and this one came from the head!

    They will get email warnings before, the second time a fine will be applied.

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    Butuz's Avatar
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    Was going round the school with a print company doing a print audit and hey presto came into a welsh room to find a projector left on, but not illuminated with all three lights on it flashing red. None of the buttons worked and I had to pull the plug out to shut it off!!!! I think that one be fried good and proper!!

    Butuz

  16. #29

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    Quote Originally Posted by Dos_Box View Post
    I enjoyed driving past a local primary school during the xmas break to see a projector in a road facing classroom still switched on, all through the holidays you'd see a faint blue square in the evenings projected on to the whiteboard. Pehaps someone here could do a guide (using current electric prices) as to what equipment left switched on costs a school. We could turn it into a poster
    Then people could use it to bill departments who are too lazy to check wether kit is switched off at weekends or during the hols.
    During the third week of the summer break a cleaner mentioned that a projector was switched on in a classroom. I did a simple calculation for the teacher involved, 6 weeks x 7 x 24 = 1008 hours, and the life of this particular bulb is around 2000 hours (I didn't add in the cost of the energy used) the first week back after the holidays in September. Second day back the head gets a call that we're going to have an Ofsted inspection the following week, and two days before the inspection this particular teacher's projector bulb starts to fail spectacularly. Fortunately we carry spares for these projectors. She still leaves her projector on all day.

  17. #30

    Edu-IT's Avatar
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    Wonder if said person leaves lights on at home all day?

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