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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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    • CommentAuthorRobL
    • CommentTimeFeb 25th 2012
     
    12months to present date 7500KWh gas + 500KWh wood + 2800KWh elec. 130m^2, so about 60KWh/m^2 heating.
    Gas has really come down year on year due to house mods - was 18000KWh when we moved in (10 years ago).
    Elec improvements too - first year in the house was 6000KWh - mainly dropped due to light bulb changes, lowering standby item use, and not leaving a PC on all the time :shamed:
    • CommentAuthorRobinB
    • CommentTimeFeb 27th 2012
     
    We've just completed a year of imeasure data and have used total of 4,799 KWh electricity as well as probably using all the 102* KWh we generated on PV since Dec 8th 2011. Because it's Feb 2011 to Feb 2012 it doesn't include that really cold weather last winter when we'd just moved in.

    Four of us (actually 3 full time and 2 half-timers) . About 190m2. No gas but we do have solar thermal too.

    *at this rate only about 160 years to break even on PV! (but I know it will improve drastically in summer).

    RobinB
    • CommentAuthordocmartin
    • CommentTimeFeb 27th 2012 edited
     
    From imeasure, for 2011 I used 2,200kWh electricity and 9,860kWh gas. During the summer, when there is no CH, gas hob and DHW average 6kWh per day. Removing 2,190kWh leaves 7,670kWh gas to heat 124m2; 61.85kWh/m2/p.a. Only 2 adults but at home all day. 2 of the 4 bedrooms are on little more than frost watch.
    • CommentAuthorcromar
    • CommentTimeJul 31st 2013
     
    Hmm. I'm a member of the Zero community on imeasure but can't see others' readings. Should I be able to? I also requested membership of the GBF community but my request has seemingly sunk into oblivion and I'm not allowed to re-request.
    •  
      CommentAuthorSteamyTea
    • CommentTimeJul 31st 2013
     
    I am in the group:
    http://imeasure.org.uk/communities/134

    They sent an email about changing things, does not seem to have changed anything I need to do though.
    • CommentAuthorRobinB
    • CommentTimeJul 31st 2013 edited
     
    Posted By: cromarHmm. I'm a member of the Zero community on imeasure but can't see others' readings.
    It depends (or should) whether the other members have chosen to share. I'm a member of both GBF and Zero and have chosen to share so would be interested to know if you can "see" our house.
    Robinb Household
    •  
      CommentAuthorSteamyTea
    • CommentTimeJul 31st 2013
     
    No, we can't see each others houses, just gives an over group mean that you can compare against as far as I know.
    • CommentAuthorRobinB
    • CommentTimeJul 31st 2013
     
    It used to be a lot more useful with an element of competitiveness that is now lost, perhaps to data compliance issues...
    • CommentAuthorjms452
    • CommentTimeJul 31st 2013
     
    They claim to be planning to redo their web site with more/different features over the next month or so.

    They were tweeting asking for suggestions a few days ago.
    •  
      CommentAuthorDamonHD
    • CommentTimeJul 31st 2013 edited
     
    FWIW, unless iMeasure demands large amounts of money off me or has unreasonable Ts&Cs changes again, and providing it's within their Ts&Cs, I am happy to try to help members of 'Zero' rank themselves, eg including SuperHome owners...

    Rgds

    Damon

    PS. We just moved from gas to electricity (induction hob + fan oven) for cooking and I'm working on a gadget or two to better align consumption with microgeneration without using bulk storage: http://www.earth.org.uk/domestic-dynamic-demand-ideas.html
    • CommentAuthorjms452
    • CommentTimeJul 31st 2013
     
    Posted By: DamonHDI am happy to try to help members of 'Zero' rank themselves


    I'd be interested to know! The question then becomes how do you deal with export?
    • CommentAuthorcromar
    • CommentTimeJul 31st 2013
     
    Sorry RobinB - can't see you or anyone else. Just a group average consumption which is not that interesting or helpful really.
    And another thing...Under Buldings>Report>Annualised I have my Rating. In that rating box it says "100 would be typical" 100 whats? Where can I find out my rating value to see how far off I am to getting to C or B?

    Waiting for the promised changes to iMeasure to see if the site becomes more useful and friendly.

    Dave
    •  
      CommentAuthorSteamyTea
    • CommentTimeAug 1st 2013
     
    • CommentAuthorcromar
    • CommentTimeAug 4th 2013
     
    I'll have a look at that, Steamy. I think I've got the meter readings in csv format somewhere so presumably I can post a variation of that file.
    • CommentAuthorarnyj
    • CommentTimeAug 4th 2013
     
    I have a friend who has sudjested I join imeasure, but after seeing some of the comment here what is the point.

    I have energy from OVO and they normally (i think) have the following data on my electronic bill, in the year just gone I used 2401kw of Elec And 2891kw of Gas.

    I have a mid terrace in Chester. which is a Superhome because of the internal insulation I have fitted myself.

    Can U tell me why I should join it
    •  
      CommentAuthorDamonHD
    • CommentTimeAug 4th 2013 edited
     
    To get a good measure of kWh/HDD amongst other things, and noticing if anything is going wrong via the numbers as well as directly. I think I saved our school a packet by noticing that we were using well above predicted given the external temperatures just from the control graphs: the control unit had switched on 24x7...

    As it happens I'm having a chat with another iMeasure-like company that I know tomorrow, specifically with an eye to doing something for Superhome owners. Maybe involving iMeasure data or not.

    Whatever you do, taking weekly readings enables all sorts of diagnostics that yearly does not.

    Rgds

    Damon
    • CommentAuthorSeret
    • CommentTimeAug 5th 2013 edited
     
    Posted By: arnyjI have a friend who has sudjested I join imeasure, but after seeing some of the comment here what is the point.


    It has built in climate data, is somewhere off-site to keep your data, and produces pretty (and useful) graphs. If your house is relatively stable (ie: you're not doing lots of improvements) then it provides very useful visualisation of the data. If you're making improvements you might find it better to do a similar analysis yourself. I'd still collect weekly data and do a scatter plot of kWh against HDDs as a minimum, broken down into smaller periods (eg: a year).

    I'm fairly underwhelmed by the idea of comparing my house to someone else's, as there are so many variables (house size and geometry, construction, age, weather, occupancy, etc, etc) that render the comparison a bit meaningless. I'm more interested in comparing my house to itself as the performance improves over time. That's where I get my motivation to keep making improvements.
    • CommentAuthorjms452
    • CommentTimeAug 5th 2013
     
    Posted By: DamonHDtaking weekly readings enables all sorts of diagnostics that yearly does not.




    Posted By: DamonHDnoticing if anything is going wrong via the numbers



    I couldn't agree more.

    The more frequent the feedback the more useful it is too act upon.
    An imeasure type analysis also lets you work out your hot water/heating split fairly well too.
    HDD analysis as above comments is good.
    Its also a convenient way of entering the data from anywhere that will remind you (if you want it too).
    Export is possible although a slight hassle.
    Psychologically I find it helpful to split energy and bills too (as the conversion rate keeps changing).
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