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  1. #1
    Join Date
    Jun 2005
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    sydney
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    Default Low e glass V glass + film

    Hi all

    I am in the process of specing the glass for an extension with a glass area of 6 and 10 Sq M , facing East and North respectivly in Sydney

    Does anyone have any input as to whether pilkington comfort glass or plain glass, (laminated or toughened is a better solution, and how best to compare the films to put on it?

    thanks for your help

    Doug

  2. #2
    Join Date
    Feb 2006
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    Hicksville
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    124

    Default

    Quote Originally Posted by doug1 View Post
    I am in the process of specing the glass for an extension with a glass area of 6 and 10 Sq M , facing East and North respectivly in Sydney

    Does anyone have any input as to whether pilkington comfort glass or plain glass, (laminated or toughened is a better solution, and how best to compare the films to put on it?
    Have a look here
    http://www.greenhouse.gov.au/yourhom...ical/index.htm

  3. #3
    Join Date
    Oct 2005
    Location
    newcastle
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    216

    Default

    heh, doug - best of luck with it, my comfort plus windows arrive on monday- when testing them, and standing in the sunlight - there was a pretty obvious difference between it and std glass - and like you I have an easterly (actually SE) window that summer makes the room as hot as hell by 9am, and cold as heaven (????) in winter.

    The films can only effect heat gain not heat ingress/egress like the low emissivity glass. So cool in summer can be done with film but not cool summer, warm winter. Further, the film's necessarily are visible and effect the colour of the view outside, whereas you can now get totally clear comfortplus (and the other manufacturers also) - which for means the house windows look the same for both stories, given I'm not going to invest $5k on cp upstairs for the kids.

    Cost - the cost to the window company is about $56 per square metre between 6.38 laminated and 6.38 CP - they'll probably tell you its $100/m - but thats their profit.

  4. #4
    Join Date
    Sep 2006
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    Behind that little door under the thicknesser...
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    Default

    All I know is that when I was quoted for some windows recently and I asked about some of these fancy low-e glass products the bloke said to me that he could assemble double glazed aluminium windows for cheaper than a single glazed window filled with low-e glass. And that's with a Pilkington outlet just around the corner.....

  5. #5
    Join Date
    Sep 2004
    Location
    Strzelecki Ranges Victoria
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    395

    Default

    There is different types of low-e glass & different configurations of double glazing.
    I.e double glazing can have 4mm glass/ 6mm air / 4mm glass
    3mm/8mm/3mm
    3mm/8mm/3mm low-e

    etc, etc

    & then you can go to argon in the space etc
    The window & glazing needs to be correctly designed for the climate zone, the application & the direction to get the best performance [in relation to cost]
    Peter Clarkson

    www.ausdesign.com.au

    This information is intended to provide general information only.
    It does not purport to be a comprehensive advice.

  6. #6
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    Sep 2006
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    Default

    No question....but show me a window supplier/manufacturer who gives a toss about that!!! So far they only seem to care about whether it is their product that fills the hole in the wall....

    Which might go to show why we jumped at a house set of six twin double hung windows.....cost us nothing but diesel.
    Ours is not to reason why.....only to point and giggle.

  7. #7
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    Oct 2005
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    Adelaide
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    329

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    Quote Originally Posted by SilentButDeadly View Post
    No question....but show me a window supplier/manufacturer who gives a toss about that!!!
    Heres one: http://www.paarhammer.com.au/energy%20savings.html

    If you have been to europe, the first thing you notice about the doors and windows is that our Aussie versions are underspec. I mean, what's the point of worrying about heat transmission and radiation through the glass when much of the actual real life heat ingress/egress occurs through leaky frames and almost complete lack of effective sealing when the window/door is shut?

    woodbe.

  8. #8
    Join Date
    Sep 2004
    Location
    Strzelecki Ranges Victoria
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    Default

    If they don't give a 'toss' they won't be in business long.
    Now that there is a 'window energy rating scheme' in place manuf. who aren't up with the game will find it hard to compete.
    But point taken . . .if energy efficiency hadn't become fashionable they'd possibly be still selling glass to fill a hole.
    Peter Clarkson

    www.ausdesign.com.au

    This information is intended to provide general information only.
    It does not purport to be a comprehensive advice.

  9. #9
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    Sep 2006
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    Quote Originally Posted by woodbe View Post
    Perhaps I should have said a 'typical' window supplier. Paarhammer are anything but typical in the Australian idiom.

    Unfortunately they aren't local to me.....yes I know they deliver but the concept of embedded energy and the number of local window suppliers tends to make them an unrealistic option.

    Like most stuff of any type available in the market these days........there's plenty of product but not much good design.
    Ours is not to reason why.....only to point and giggle.

  10. #10
    Join Date
    Sep 2004
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    Strzelecki Ranges Victoria
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    Default

    Advance
    Affinity
    Aneeta
    Bradnams
    Breezway
    Canterbury
    Dowell
    Everglaze
    G James
    Rylock
    Stegbar
    Trend
    Wideline

    to my knowledge all are part of a nation wide rating scheme for energy efficient windows
    Peter Clarkson

    www.ausdesign.com.au

    This information is intended to provide general information only.
    It does not purport to be a comprehensive advice.

  11. #11
    Join Date
    Oct 2005
    Location
    Adelaide
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    329

    Default

    Quote Originally Posted by SilentButDeadly View Post
    the concept of embedded energy and the number of local window suppliers tends to make them an unrealistic option.
    I hear you, but I have no idea how you are making those calculations.

    Ok, the transport energy is an add-on, and probably the more efficient window takes more energy in it's construction by virtue of the nature of it's components. but if the concept of embedded energy is to be any use, doesn't it have to be balanced against the energy efficiency of the finished item over it's life? There should be a break-even at some point, and if that falls within the practical life of the window...

    Because of the wild-card future energy costs, the financial calculations (dollar cost of window, compared to dollar energy savings x life of window) are hard enough, but isn't any window very difficult or even impossible to quantify on embedded energy terms?

    woodbe.

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