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Thread: Evohome Savings

  1. #1
    Automated Home Legend
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    Default Evohome Savings

    I have endeavoured to see how much Evohome has saved me. I installed it in December 2014. It appears to be saving me about 3,000 kWhs per annum. At my current rate for gas that is about 100 per annum. I have therefore got a good chunk of the cost back. I have though always looked on the main benefit being the control it gives.

  2. #2
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    I've only had evohome installed for a few weeks now, so I'm not going to see any benefit until the colder nights start creeping in, but what I have noticed is that the odd room will call for heat as expected, but that is taking some getting used to because previously the only room that could call for heat was the living room (where the old room stat was located) and that would hardly ever call for heat in the summer because of a bloody great plasma telly in there that keeps the room fairly warm. So I might actually see my summer gas usage increase compared to previous years, unless I go around and tweak the set points in those rooms that do occasionally call for heat, but the whole point of me installing evohome was so that I could heat rooms independently, so I'm not too bothered as we should end up more comfortable, for instance I could sometimes end up shivering a bit in the conservatory whilst the missus was nice and toasty in the living room.

    Also we've recently got a dog and I used to have to leave the living room door open to let some of the heat dissipate, but sometimes we don't want the dog going in there, so closing the door would cause a heat trap and the rest of the house would be freezing. Now I can close the living room door and not worry about it.

    I also work from home and didn't like the bedrooms upstairs being heated whilst the kids are at school and I'm sat in the downstairs office all day, so I'm looking forward to seeing what my gas usage is like next year - this house is a bugger to heat, I normally get through between 23-26,000kwh of gas per year.

  3. #3
    Automated Home Jr Member
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    Mine was installed in February 2019 and I've had a credit refund every summer from my utility supplier. 175 the first summer, then 160 last year; only 40 this time. But we have been WFH after all. Gas usage is 21-22,000kWh p.a.

  4. #4
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    I don't work in cash, its irrelevant because the rates change, but annual KW usage doesn't, before evo home I was using 25000KW annually, after installation, I use about 20000KW, so I use about 20% less.

    So pay back 4 installation will be about 4-5 years. 800, 9 zones, i self installed.

    Evohome saves money, but I prefer the control options and comfort levels.
    Last edited by frankmalia; 25th June 2021 at 02:26 PM.

  5. #5
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    Quote Originally Posted by frankmalia View Post
    I don't work in cash, its irrelevant because the rates change, but annual KW usage doesn't, before evo home I was using 25000KW annually, after installation, I use about 20000KW, so I use about 20% less.

    So pay back 4 installation will be about 4-5. 800, 9 zones, i self installed.

    Evohome saves money, but I prefer the control options and comfort levels.
    I guess I am saving more than my figures imply. I worked on kWhs consumed not cost and the latter is impossible to compare. My consumption looks as though it has dropped by about 3,000 kWhs p.a. But it could be more depending on weather conditions. Evohome does save money but the major benefit is what it does.

  6. #6
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    I think that establishing a meaningful definitive cost saving is almost impossible as there are so many variables to take into account. Duration of heating periods, outside temperatures and weather conditions, inside temperatures and comfort levels achieved, to name but a few!! As elusive as trying to pin down an mpg figure for a car!!
    I think that if you keep doing all the right things when setting up Evohome ie make sure that make use of all the fuel burnt, then an optimum cost/comfort balance will be achieved

    Steve

  7. #7
    Automated Home Guru
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    Well, as far as I can see the Evohome installation has had no effect on annual usage, although in the year of installation (2016) I did actually come down 3GJ. I've been consistently on 17GJ per annum since, which is the same usage that was registered for 2015 but it should be noted that between 2010-2014 we averaged at 26GJ. The increased level of comfort throughout the house however is immense, in particular in my home office where it did occur once in a while that I couldn't feel my fingers while typing.

  8. #8
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    Quote Originally Posted by Jenks View Post
    I think that establishing a meaningful definitive cost saving is almost impossible as there are so many variables to take into account. Duration of heating periods, outside temperatures and weather conditions, inside temperatures and comfort levels achieved, to name but a few!! As elusive as trying to pin down an mpg figure for a car!!
    I think that if you keep doing all the right things when setting up Evohome ie make sure that make use of all the fuel burnt, then an optimum cost/comfort balance will be achieved

    Steve
    I agree, I have had my Evo Home for just the central heating since Sept 2018 and I have kept more accurate figures from 2016

    2017 = 18,739 (before Evo Home)
    2018 = 19,532 (before Evo Home)
    2019 = 18,962
    2020 = 19,069
    2021 = 19,827 (Aug and Sept assumed as same as last year)

    The variables that will make it nigh on impossible to show a saving.

    Weather conditions tied into holidays during those weather conditions. I.e. the amount of time spent at home when you need heat.

    Lockdown and working from home has seriously affected consumption, lack of winter holidays during Covid.

    Retiring and spending more time at home...

    The following is not like for like (i.e. measured from Sept to August), These are figures from previous years Jan to Dec

    2002 = 17071
    2003 = 29678
    2004 = 21281
    2005 = 21281
    2006 = 21248
    2007 = 26190
    2008 = 23414
    2009 = 22969
    2010 = 23736
    2011 = 22936
    2012 = 24680
    2013 = 28467
    2014 = 20726
    2015 = 22836
    2016 = 23380

  9. #9
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    Indeed, it is not the cost, as charging rates will vary, but the consumption. My figures show:
    2007 20,501.00
    2008 20,967.00
    2009 22,421.51
    2010 21,818.00
    2011 13,626.82
    2012 14,775.92
    2013 22,340.89
    2014 18,190.47
    2015 17,866.53
    2016 17,723.57
    2017 14,903.10
    2018 19,773.10
    2019 15,662.00
    2020 17,608.00

    Evohome was installed at the end of 2014. I live in a four bedroom detached house in the NE.

  10. #10
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    I would not be able to recommend anyone install EvoHome to save money. Some may eventually achieve payback, but it is by no means guaranteed. If you have a stable usage requirements, simple thermostatic valves and a time clock my well meet your needs at lower overal cost and with far less complexity. However, if you cannot achieve a stable balance between zones, EvoHome is excellent and worth every penny.

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