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Heating and cooling: Ariston NUOS

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1 to 16 of 16

  1.  
    • CommentAuthorsmudger
    • CommentTimeSep 30th 2016
     
    Anyone seen, used or opinions on these?

    http://www.aristonthermo.com/en/Brand/water_heating

    http://www.bse3d.com/wp-content/uploads/2014/10/Ariston-Heathrow-Perfectionists-Cafe-NUOS.pdf

    I'm looking for efficient water heating system with a bit more flexibility than off peak cylinder/immersion (we also have 'excess pv' to benefit from).

    Any alternative solutions to look at?
    • CommentAuthorCWatters
    • CommentTimeOct 2nd 2016
     
    I find their site very short on details. Where do they justify their -20% saving claim?
    • CommentAuthorfinnian
    • CommentTimeOct 2nd 2016
     
    Has anyone tried the Hitachi yutampo? Claims to have better performance at low temperatures. It's a split system type, which may or may not be an advantage.

    http://www.rouchenergies.fr/chauffe-eau-thermodynamique/yutampo-le-champion-des-thermodynamiques.html

    http://www.bublshop.co.uk/yutampo/p1866
    • CommentAuthorGarethC
    • CommentTimeOct 3rd 2016
     
    Is this for a new build, or are you looking to replace an existing system? And is it the Ariston heat pump systems you're looking at? At stated COPs, the heat pumps will be no cheaper to run, and only a bit greener, than a gas combi boiler. If you've not got natural gas, we discussed elsewhere that the rinnai systems on LPG is arguably even better than a natural gas combi. So worth comparing capital costs.

    Otherwise, I like the look of those systems, but wish they were 1/3 the price (so my economist head could justify swapping out my gas combi), and I'd like to know the performance, practically and for the COP, if I set it to heat water to just 40 degrees. Even allowing for occasional legionella treatment, I think it might be much cheaper and greener than gas with that regime.

    Should say I don't actually have any first hand experience!
    • CommentAuthortony
    • CommentTimeOct 3rd 2016
     
    Re heat losses from hot water storage, in the winter it all goes into the house reducing heating demand. I think that they ignore this so the 20% savings are for hot water only not fot the house.

    Also 4 min as opposed to 5 min shower would do the same and nationally save us a couple of power stations.
    •  
      CommentAuthorSteamyTea
    • CommentTimeOct 3rd 2016 edited
     
    Posted By: tonyAlso 4 min as opposed to 5 min shower would do the same and nationally save us a couple of power stations.
    Yes, there is a good 30% of energy to be saved just by these sorts of simple measures.
    • CommentAuthorGarethC
    • CommentTimeOct 3rd 2016
     
    How about this for one of the simplest, cheapest, most effective and almost certainly most massively unpopular energy saving measures possible:

    Make shower and bath flow rates above something "reasonable" and flow temperatures above 40 degrees illegal.
  8.  
    Smudger,

    One question that may be relevant - are you using this in a house with MVHR?

    We've been considering the NUOS for our house build but I read somewhere that the air pump will be 'fighting against' the MVHR system, so have paused for a while in the hope I can get my head around it!
    • CommentAuthorDarylP
    • CommentTimeOct 3rd 2016
     
    @GarethC, flow-rates and bath capacities are now covered under Reg. 36 water efficiency calcs (WECs).
    Not well-enforced or well-known tho'!:devil:
    • CommentAuthorgravelld
    • CommentTimeOct 3rd 2016 edited
     
    By homogenising baths and showers we are showing a misunderstanding. If you stop baths filling fast, you'll just use more energy.

    This is the kind of simplification that government likes to make without understanding the realities, because it fits their economic "models" (read: excel spreadsheets).

    Reminds me of energy efficiency policy.

    In a post modern, democratised world we will not win people over by preaching this kind of hair shirted bollocks.
    • CommentAuthorsnyggapa
    • CommentTimeOct 3rd 2016
     
    all baths should be used by at least two people.

    Whether you do this consecutively or together, your choice :D
    •  
      CommentAuthorSteamyTea
    • CommentTimeOct 3rd 2016
     
    Posted By: snyggapaall baths should be used by at least two people.

    Whether you do this consecutively or together, your choice

    I shall stop taking my pills and hope the schizophrenia comes back, oh the joys of living alone :wink:
    • CommentAuthorFred56
    • CommentTimeOct 3rd 2016
     
    If the water efficiency calculator is the same as it was in 2012, it's still bollox.
    • CommentAuthorsmudger
    • CommentTimeOct 8th 2016
     
    I'm looking for refurb solution.

    No MVHR, No gas (calor or mains), no oil. All electric economy 10 and 10kw PV array. But its is limiting (PV in daylight /sunny days, offpeak for set hours of the day).

    We need a new larger 'water storage solution'. Price didnt seem horrendous compared to some thermal stores.
    • CommentAuthorsmudger
    • CommentTimeOct 8th 2016
     
    Also no stasi shower police in this house.....
    • CommentAuthorGarethC
    • CommentTimeOct 9th 2016
     
    I think I'd compare with a rinnai, and if that doesn't look better, the Ariston's prob not a bad solution.

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