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Green Computing Thread, Printers left on during holidays and nights/weekends in Technical; ...
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    localzuk's Avatar
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    Printers left on during holidays and nights/weekends

    Just had a look on PaperCut and can see that around the school, 13 different laser printers have been left on. They use anywhere between 48W and 150W in 'standby' depending on their size.

    I just figured out, using 100W as an average for our devices, that this would equate to around £800 of electricity costs for those times.

    Does anyone have any ideas on how to remind people to do this? I could put timers on them I suppose, turning them off on weekends and overnight, but that leaves holidays.

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    SYNACK's Avatar
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    Wow, that is energy saving of you, I would probably look at the timers and then just manually get them over the holidays getting people to remember without serious pavlovian conditioning would be difficult. There again if you have a bell and a bunch of cakes it may be worth a go

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    Dos_Box's Avatar
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    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.
    Last edited by Dos_Box; 22nd February 2011 at 12:15 PM.

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    We just use the 6 way power adapters that uses one socket as a master which would be the PC and then the other 5 are slaves. When the pc shuts down, it kills the power to the other 2 dead. Then when the PC is powered back on, the slaves become live again. I think they are made by "PC Power Down"

    For Printers that dont have PCs in the room, then we just use timers.

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    localzuk's Avatar
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    Quote Originally Posted by techie08 View Post
    We just use the 6 way power adapters that uses one socket as a master which would be the PC and then the other 5 are slaves. When the pc shuts down, it kills the power to the other 2 dead. Then when the PC is powered back on, the slaves become live again. I think they are made by "PC Power Down"

    For Printers that dont have PCs in the room, then we just use timers.
    Problem is, these printers are network printers in classrooms and offices, and all staff use laptops so there aren't PCs powering up and down.

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    For offices that have only printers in we just use timers. They Turn off at 8pm and back on again at 8am

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    SYNACK's Avatar
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    I would be interested at the cost for as a lot of TFT's get left on at our places.

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    webman's Avatar
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    We've just bought some timer sockets for all of our printers. Doesn't solve the holiday problem, but it will make a huge difference.

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    Another way is to have computer only sockets located for these devices and have a number of switches where they can be powered off at rather than having to go around all rooms. I know this inst always practical and could be costly to install but worth looking at.

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    Little-Miss's Avatar
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    I find it quite funny how ive never thought about a timer before.....so do a lot of you use them?

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    john's Avatar
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    Have you all been reading my article in School Financial Management or did you all hide in the back of the conference in January I presented at in London as I covered this topic back then!

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    Butuz's Avatar
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    Quote Originally Posted by localzuk View Post
    I just figured out, using 100W as an average for our devices, that this would equate to around £800 of electricity costs for those times.
    Whaaaa????? What printers have you got?? If your power figures are accurate then I suggest you sell them all on ebay now and buy some decent ones!!! 150w in standby is bonkers!!!

    I've measured a couple here and dont get any where near your figures:

    HP LaserJet 4250n (5 years old) gives:
    On and Ready: 15.5w
    Standby / Sleep: 9.3w

    Brother HL6050DN (2 years old) gives:
    On and Ready: 10.9w
    Standby / Sleep: 7.7w

    Are you sure your printers use 150w sleeping? Do they have a sleep mode that you need to enable??

    Cheers

    Butuz

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    Domino's Avatar
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    Quote Originally Posted by Dos_Box View Post
    We could turn it into a poster
    Turn your peripherals off or we'll chin ya
    -Love Edugeek

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    FreeWill's Avatar
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    To calculate the hourly cost of leaving devices on the following calculation is used:

    Power Consumption of device (W) / 1000 x Price per unit (p) = pence per hour

    e.g. if a projector used 200W of power and the cost of electricity was 10p per unit:

    200 / 1000 x 10 = 2p

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