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action="https://www.styropianknauf.pl/"><input type="text" name="s" placeholder="Wyszukaj w serwisie" value=""> <button type="submit">Szukaj</button> <div class="close"></div> </form> </div> </header> <div class="header-spacer"></div> <div class="container"> <div class="breadcrumbs"> <span class="home"><a href="https://www-styropianknauf-pl.translate.goog/?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB"></a></span><span><span><a href="https://www-styropianknauf-pl.translate.goog/baza-wiedzy/?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB">Baza wiedzy</a></span> / <span class="breadcrumb_last" aria-current="page">Co to jest WSPÓŁCZYNNIK PRZENIKANIA CIEPŁA U oraz jaka jest jego zależność od współczynnika przewodzenia ciepła λ ?</span></span> </div> </div> <div class="container"> <div class="blog-single"> <h1>Co to jest WSPÓŁCZYNNIK PRZENIKANIA CIEPŁA U oraz jaka jest jego zależność od współczynnika przewodzenia ciepła λ ?</h1> <div class="date"><span>26 września 2024</span> </div> <div class="image"><img width="870" height="489" src="https://www.styropianknauf.pl/wp-content/uploads/2020/09/U-870x489.png" class="attachment-news-single size-news-single wp-post-image" alt="wspolczynnik u przegrody U styropian" decoding="async" srcset="https://www-styropianknauf-pl.translate.goog/wp-content/uploads/2020/09/U-870x489.png?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB 870w,https://www-styropianknauf-pl.translate.goog/wp-content/uploads/2020/09/U-300x169.png?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB 300w,https://www-styropianknauf-pl.translate.goog/wp-content/uploads/2020/09/U-1024x576.png?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB 1024w,https://www-styropianknauf-pl.translate.goog/wp-content/uploads/2020/09/U-768x432.png?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB 768w,https://www-styropianknauf-pl.translate.goog/wp-content/uploads/2020/09/U.png?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB 1200w" sizes="(max-width: 870px) 100vw, 870px"> </div> <div class="description"> <h2>Sprawdź czym jest współczynnik przenikania ciepła</h2> <p>Współczynnik przenikania ciepła U, jest wielkością określającą <a href="https://www-styropianknauf-pl.translate.goog/baza-wiedzy/czy-w-polsce-sa-przepisy-okreslajace-wymagania-dla-izolacji-cieplnej-scian-i-innych-przegrod-budowlanych/?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB">jakość izolacyjności cieplnej</a> całej przegrody budowlanej (np. ściany, dachu itp.). Wg definicji współczynnik przenikania ciepła U jest odwrotnością oporu cieplnego przegrody (R).</p> <p>Wzór podstawowy:</p> <p><img decoding="async" class="alignnone size-full wp-image-322" src="https://www.styropianknauf.pl/wp-content/uploads/2020/12/1408535397_741104001.jpg" alt="" width="150" height="59"></p> <p><strong>Zachodzi tu prosta zależność: im opór przegrody R (czyli jej izolacyjność) jest wyższy, tym współczynnik U jest mniejszy.</strong></p> <p>Opór cieplny przegrody budowlanej (R) jest sumą oporów jej poszczególnych warstw. Uzależnione są one od izolacyjności termicznej zastosowanych materiałów. Opór cieplny materiału jest więc zależny wprost od jego współczynnika λ, według wzoru:</p> <p>Opór cieplny pojedynczej warstwy materiału:</p> <p><img decoding="async" class="alignnone size-full wp-image-323" src="https://www.styropianknauf.pl/wp-content/uploads/2020/12/1408535463_065937001.jpg" alt="" width="138" height="54"></p> <p>gdzie: d- grubość warstwy, λ- współczynnik przewodzenia ciepła materiału</p> <p>Oznacza to, że im większa grubość materiału oraz im niższa wartość współczynnika przewodzenia ciepła λ, tym przegroda osiąga lepsze parametry izolacyjności cieplnej.<br> Z tego powodu ważne jest, aby jako izolację termiczną, stosować materiały o jak najniższej wartości λ oraz o możliwie jak największej ich grubości.</p> <p>Zastosowanie dobrej jakości materiałów izolacyjnych, takich jak <a href="https://www-styropianknauf-pl.translate.goog/styropian-budowlany-eps/?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB">styropiany Knauf Therm</a>, pozwala na osiągnięcie wysokiej oporności cieplnej przegrody R. Tym samym wartość współczynnika przenikania ciepła U przegrody jest niska. Jeżeli budynek posiada niskie wartości współczynnika przenikania ciepła U przegród budowlanych, to oznacza, że jest <a href="https://www-styropianknauf-pl.translate.goog/blog/energooszczednosc-w-wielkim-wymiarze/?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB">energooszczędny</a>. A jego normalna eksploatacja powinna być niedroga. Zwykle wartość współczynnika przenikania ciepła U obliczana jest na podstawie informacji dotyczących materiałach budowlanych. Możemy je znaleźć w dokumentacji technicznej budynku. Graniczne (dopuszczalne) wartość współczynnika U określone są w przepisach budowlanych.</p> <p><a href="https://www-styropianknauf-pl.translate.goog/baza-wiedzy/czy-w-polsce-sa-przepisy-okreslajace-wymagania-dla-izolacji-cieplnej-scian-i-innych-przegrod-budowlanych/?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB">Dowiedź się więcej o wymaganiach dla izolacji cieplnej!</a></p> </div> </div> </div> <footer> <div class="container"> <div class="columns"> <div> <div class="menu-menu-produktowe-container"> <ul id="menu-menu-produktowe" class="nav nav-footer" itemscope itemtype="http://www.schema.org/SiteNavigationElement"> <li id="menu-item-500" class="menu-item menu-item-type-taxonomy menu-item-object-category menu-item-has-children menu-item-500"><a href="https://www-styropianknauf-pl.translate.goog/styropian-budowlany-eps/?_x_tr_sl=pl&_x_tr_tl=cs&_x_tr_hl=en-GB">Styropian budowlany EPS</a> <ul class="sub-menu"> <li id="menu-item-505" class="menu-item menu-item-type-taxonomy 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