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Thread: This Ultra-White Paint May Someday Replace Air Conditioning

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    Loony Running The Asylum ZiprHead's Avatar
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    This Ultra-White Paint May Someday Replace Air Conditioning

    Developed by researchers at Purdue University, the paint reflects 98.1 percent of sunlight

    A new coat of paint is an easy way to freshen up your home’s curb appeal. Soon, it may also help keep your house cool.

    Researchers at Purdue University have developed a new ultra-white paint that reflects 98.1 percent of sunlight and can keep surfaces up to 19 degrees Fahrenheit cooler than their ambient surroundings. This new paint, which may become available for purchase in the next year or two, could someday help combat global warming and reduce our reliance on air conditioners.

    The team of scientists in Purdue’s mechanical engineering department recently published the findings of their paint research, funded by the university’s cooling technologies research center and the Air Force’s scientific research office, in the journal ACS Applied Materials & Interfaces.

    “Our paint only absorbs 1.9 percent of the sunlight, whereas commercial paint absorbs 10 to 20 percent of sunlight,” says Xiulin Ruan, a Purdue mechanical engineering professor and one of the study’s co-authors.
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    And as soon as we paint roofs this’ll be a game changer.

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    Contributor skepticalbip's Avatar
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    This Ultra-White Paint May Someday Replace Air Conditioning
    That headline is a bit misleading. If it is above 95 deg. F outside, the paint won't cool the house. What the paint can do is reduce the need for AC - especially as, JH noted, if the roof is painted with it.

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    And in a matter of days or weeks, dust, leaves and debris will accumulate on the roof making the whole thing moot.

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    Just cover your house in aluminum foil.

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    Veteran Member Treedbear's Avatar
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    Quote Originally Posted by Shadowy Man View Post
    Just cover your house in aluminum foil.
    FYI
    The reflectivity of bright aluminium foil is 88% while dull embossed foil is about 80%.

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    Quote Originally Posted by thebeave View Post
    And in a matter of days or weeks, dust, leaves and debris will accumulate on the roof making the whole thing moot.
    All radiant barriers suffer from this problem.

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    Quote Originally Posted by Jimmy Higgins View Post
    And as soon as we paint roofs this’ll be a game changer.
    Quite common to paint roofs in AZ.

    https://www.homedepot.com/b/Reflecti...-5yc1vZ1z0lpkk

    Even on the flat roofs, dust/leaves have a minimal effect.

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    Quote Originally Posted by Treedbear View Post
    Quote Originally Posted by Shadowy Man View Post
    Just cover your house in aluminum foil.
    FYI
    The reflectivity of bright aluminium foil is 88% while dull embossed foil is about 80%.
    might not be as reflective but it’s probably a lot cheaper than the fancy white paint.

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    Contributor skepticalbip's Avatar
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    Quote Originally Posted by Shadowy Man View Post
    Quote Originally Posted by Treedbear View Post

    FYI
    might not be as reflective but it’s probably a lot cheaper than the fancy white paint.
    I would think shade trees would be much better. My home has tall magnolia trees on the south side which shade the house. They also cool the air through evaporation from their leaves so that it is noticeably cooler under them.

    It's a shame that new housing developments strip the trees from the development before building then plant a few seedlings as decoration.

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