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BER for 1950s House

  • 02-03-2009 4:47pm
    #1
    Closed Accounts Posts: 2,379 ✭✭✭


    Hi,
    I'm doing a BER for a 2 storey detached 1950s 110m2 house.
    -Cavity block construction
    -100mm roof insulation
    - Space and water heating by electricity


    Its getting a G rating - 870 kwh/m2/yr.
    It seems like a ridiculously high energy rating.

    I know the electric heating is a killer but when I change to gas for both water and space heating, it's still a G rating.

    I've gone through it a few times but can't see anything wrong.
    Does anyone have any experience with houses of this construction/era?
    Is this the norm?


Comments

  • Subscribers Posts: 42,171 ✭✭✭✭sydthebeat


    whats the revised energy value when changed to gas?

    this should make a significant saving....


  • Closed Accounts Posts: 2,379 ✭✭✭Jimbo


    Just changing both fuel types to Mains Gas, without changing to boiler, etc gives 450kwh/m2/yr which is a very significant change but still a very poor rating.


  • Registered Users, Registered Users 2 Posts: 179 ✭✭dunie001


    it's a 1950's house not a 2009 passive house you're doing the BER on...that's a typical result really.

    1950's houses have absolutely no insulation in the cavities or the floor so don't be too surprised...


  • Registered Users, Registered Users 2 Posts: 2,489 ✭✭✭No6


    it is a 50's house, are if you using the defaults for u values etc with electric heating it sounds about right. Very poor.


  • Closed Accounts Posts: 2,379 ✭✭✭Jimbo


    dunie001 wrote: »
    it's a 1950's house not a 2009 passive house you're doing the BER on...that's a typical result really.

    1950's houses have absolutely no insulation in the cavities or the floor so don't be too surprised...

    I haven't done many BERs on older houses so I was a bit surprised.

    Is it not a flaw on the rating system that a relatively comfortable house built 50 years ago with double glazed windows and roof insulation would be designated the same rating as, say, a draughty, uninsulated stone house built 200 years ago?

    There should either be more ratings at the lower end of the scale or the ratings more evenly distributed so that all older houses don't fall under the same rating.
    How can the layman easily compare these houses?


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  • Registered Users, Registered Users 2 Posts: 179 ✭✭dunie001


    I guess they would just look at the figure that is printed on the BER Cert beside the rating and choose the house with the lowest one...

    It would be clearly shown beside the G rating whether it is 450 or 800kWh/m2/yr.


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