Case studies

  • Sunny region makes the most of solar water heating benefits
    Case studies
    1 May 2010

    When you live in a sunny area of the country, solar water heating seems an obvious decision.  Check out three Nelson householders who said yes to solar water heating, and find out why it's making a difference for them.  May 2010.

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  • Rural family opts for solar water heating
    Case studies
    1 March 2009

    Vivien Edge and Ken Ross put a lot of thought and research into the design of their new home in rural Upper Moutere three years ago. They wanted a home that had minimal impact on the
    global environment, was comfortable to live in, and that also made sense financially. This case study describes how Vivien and Ken:
    • went about designing energy efficiency into their new home,
    • assessed the solar water heating options and chose an installer,
    • live comfortably with solar water heating throughout the year,

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  • Efficient Bulb Test
    Case studies
    1 June 2009
    A 100W traditional incandescent bulb running for three hours a day costs $25 a year in electricity. A 20W CFL equivalent costs just $5 to run for that long. So a CFL will pay for itself in just a few months – and it’ll last longer as well.
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  • LEDs - 21st century lighting
    Case studies
    1 June 2011

    LEDs have been round since the 1960s. But it’s taken years of continuous development to transform them into devices bright enough for general lighting – and that development continues, so LEDs should get better and cheaper.

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  • Downlight test
    Case studies
    2 March 2010

    The ventilation required around downlights - a feature of many NZ homes - steals warmth from rooms. Improving overall energy performance isn't just a matter of switching to energy efficient bulbs. Consumer looked at both downlight fittings and bulbs to find the best options.

    Report by Bill Whitley, Consumer NZ.
    2 March 2010

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  • Home Lighting Choices
    Case studies
    1 June 2010

    The range of energy efficient bulbs has increased dramatically lately, with options now covering virtually every fitting and situation. Which are right for you? This Consumer report helps you choose which sort of light is right, where.

    Consumer Report – Choosing the Right Bulb
    Report by Bill Whitley, Consumer NZ. June 2010

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