A radiant barrier reduces the radiant heat transfer from the underside of the roof to the other surfaces in the attic.Ī radiant barrier works best when it is perpendicular to the radiant energy striking it. The hot roof material then radiates its gained heat energy onto the cooler attic surfaces, including the air ducts and the attic floor. Much of this heat travels by conduction through the roofing materials to the attic side of the roof. When the sun heats a roof, it's primarily the sun's radiant energy that makes the roof hot. The radiant barrier should be installed in a manner to minimize dust accumulation on the reflective surface. Dust accumulation on the reflective surface will reduce its reflective capability. To be effective, the reflective surface must face an air space. Radiant barriers and reflective insulation systems work by reducing radiant heat gain. Most common insulation materials work by slowing conductive heat flow and - to a lesser extent - convective heat flow. ![]() Radiant heat travels in a straight line away from any surface and heats anything solid that absorbs its energy. As the liquid or gas cools, it becomes denser and falls. Heat transfer by convection occurs when a liquid or gas - air, for example - is heated, becomes less dense, and rises. Heat flows by conduction from a hotter location within a material or assembly to a colder location, like the way a spoon placed in a hot cup of coffee conducts heat through its handle to your hand. ![]() Send us feedback about these examples.Heat travels from a warm area to a cool area by a combination of conduction, convection, and radiation. These examples are programmatically compiled from various online sources to illustrate current usage of the word 'bright.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. 2022 Kelsea Ballerini brings the bright to SiriusXM Studios in N.Y.C. 2022 These types of colors can make any lipstick - even your loudest red - feel more wearable and less over-the-top bright. 2022 The prickly pear and pomegranate options were on the sweet side while the mango, strawberry, and blood orange entries hit just the right bright, tangy notes. 2023 Sitting at the bright and airy James Oliver Coffee Co. Natasha Wimmer, The New York Review of Books, 16 Feb. 2023 Tawada’s words are easy to understand-in this novel more than ever-and her dystopia is Day-Glo bright. Jessica Madavo Delphine Danhier, New York Times, 20 Mar. 2023 Knits that range from quiet neutrals to high-contrast brights. 2023 Though there will always be space for neutrals, uplifting brights offer something different: a moment for celebration. Sydney Price, Better Homes & Gardens, 10 Apr. Noun If brights are too daunting, try a dark version of a color, such as burgundy, forest green, or eggplant. Ben Jones, CNN, For the casual outing, Kate wore a long coat dress in a bright poppy red color from Eponine London. Mark Gurman, Fortune, The bright yellow signature color dominates inside and out, with Pikachu motifs covering everything from floor to walls and curtains. Matt Ng, Popular Mechanics, Its screen is 25% brighter than the preceding model and has a faster, 90-hertz refresh rate. Arricca Elin Sansone, Country Living, With its large and bright screen, strong 13-megapixel camera, and solid sound, the Echo Show 10 is ideal for just about anything, including Alexa connectivity and video calls. Mike Freeman, San Diego Union-Tribune, Give jade plants bright filtered light year-round, preferably in a south-facing window. Rachel Silva, ELLE Decor, Among the concerns are the impact of the sun’s bright reflections off the satellites on telescopes used for things like tracking asteroids or Earth observation missions that take measurements of climate. ![]() Briannah Rivera, Seventeen, With 100 rooms to peruse-featuring whimsical wallpaper and any number of other artful touches-there’s bound to be a bright idea here that suits your space and style. Adjective Her nails were painted a bright, fiery red, and her black hair, styled in a deep side part, fell down her shoulders in beachy waves.
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