{"id":5124,"date":"2026-11-13T19:33:48","date_gmt":"2026-11-13T18:33:48","guid":{"rendered":"https:\/\/aristofenster.eu\/wspolczynnik-uw-okna\/"},"modified":"2026-11-14T05:00:16","modified_gmt":"2026-11-14T04:00:16","slug":"wspolczynnik-uw-okna","status":"publish","type":"post","link":"https:\/\/aristofenster.eu\/pl\/wspolczynnik-uw-okna\/","title":{"rendered":"Wsp\u00f3\u0142czynnik Uw okna \u2013 co oznacza i jaka warto\u015b\u0107 jest dobra?"},"content":{"rendered":"<p>Por\u00f3wnuj\u0105c oferty na okna, wsz\u0119dzie spotyka si\u0119 skr\u00f3ty <strong>Uw, Ug i Uf<\/strong>. Najwa\u017cniejszy jest wsp\u00f3\u0142czynnik Uw \u2013 m\u00f3wi, ile ciep\u0142a ucieka przez ca\u0142e okno. Wyja\u015bniamy, co kryje si\u0119 za liczbami, jakie wymagania obowi\u0105zuj\u0105 w Polsce i ile mo\u017cna zaoszcz\u0119dzi\u0107 dzi\u0119ki lepszym oknom.<\/p>\n<h2>Co oznacza wsp\u00f3\u0142czynnik Uw?<\/h2>\n<p>Wsp\u00f3\u0142czynnik przenikania ciep\u0142a U okre\u015bla, ile energii cieplnej w watach ucieka przez metr kwadratowy przegrody przy r\u00f3\u017cnicy temperatur jednego stopnia mi\u0119dzy wn\u0119trzem a otoczeniem. Jednostk\u0105 jest W\/(m\u00b2K). Zasada jest prosta: <strong>im ni\u017csza warto\u015b\u0107, tym lepiej okno izoluje.<\/strong> Litera \u201ew\u201d oznacza \u201ewindow\u201d \u2013 wsp\u00f3\u0142czynnik Uw opisuje wi\u0119c ca\u0142e okno: ram\u0119, szyb\u0119 i kraw\u0119d\u017a szyby.<\/p>\n<h2>Uw, Ug, Uf i Psi \u2013 elementy sk\u0142adowe<\/h2>\n<ul>\n<li><strong>Ug (glazing):<\/strong> izolacyjno\u015b\u0107 szyby. Pakiet dwuszybowy ma ok. 1,1, a trzyszybowy 0,5\u20130,7 W\/(m\u00b2K).<\/li>\n<li><strong>Uf (frame):<\/strong> izolacyjno\u015b\u0107 ramy. Nowoczesne profile PCV osi\u0105gaj\u0105 ok. 0,9\u20131,2 W\/(m\u00b2K).<\/li>\n<li><strong>Psi (\u03a8):<\/strong> mostek termiczny na kraw\u0119dzi szyby. \u201eCiep\u0142a ramka\u201d z tworzywa zamiast aluminium zmniejsza te straty.<\/li>\n<\/ul>\n<p>Z tych warto\u015bci i udzia\u0142u powierzchni oblicza si\u0119 wsp\u00f3\u0142czynnik Uw. Producenci podaj\u0105 go zwykle dla okna referencyjnego o wymiarach 1,23 \u00d7 1,48 m. Ma\u0142e okna z du\u017cym udzia\u0142em ramy maj\u0105 nieco gorsz\u0105 warto\u015b\u0107, du\u017ce okna cz\u0119sto lepsz\u0105.<\/p>\n<figure class=\"wp-block-image size-large af-gfx\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/aristofenster.eu\/wp-content\/uploads\/aristofenster-blog-wspolczynnik-uw-porownanie-pl.png\" alt=\"Wykres: wsp\u00f3\u0142czynnik Uw starych i nowych okien z wymaganiem WT 2021\" width=\"1200\" height=\"664\" loading=\"lazy\" \/><figcaption>Wsp\u00f3\u0142czynniki Uw w por\u00f3wnaniu \u2013 z wymaganiem Warunk\u00f3w Technicznych WT 2021.<\/figcaption><\/figure>\n<h2>Jakie wymagania obowi\u0105zuj\u0105?<\/h2>\n<p>W Polsce <strong>Warunki Techniczne (WT 2021)<\/strong> wymagaj\u0105, aby okna w ogrzewanych pomieszczeniach mia\u0142y wsp\u00f3\u0142czynnik Uw nie wy\u017cszy ni\u017c <strong>0,9 W\/(m\u00b2K)<\/strong> (okna dachowe: 1,1 W\/(m\u00b2K)). Dla por\u00f3wnania: w Niemczech przy wymianie okien obowi\u0105zuje 1,3 W\/(m\u00b2K). W domach pasywnych stosuje si\u0119 okna o wsp\u00f3\u0142czynniku oko\u0142o 0,8 W\/(m\u00b2K) i ni\u017cszym.<\/p>\n<div class=\"af-cta\" style=\"background:#073C61;color:#ffffff;padding:28px 32px;border-radius:6px;margin:36px 0;border-left:6px solid #FFCC00\">\n<p style=\"margin:0 0 8px;font-size:21px;line-height:1.35;font-weight:700;color:#ffffff\">Jaki wsp\u00f3\u0142czynnik Uw potrzebuj\u0105 Twoje okna?<\/p>\n<p style=\"margin:0 0 18px;color:#e6eef4\">Obliczymy Uw dla Twoich wymiar\u00f3w okien i poka\u017cemy, kt\u00f3ry wariant op\u0142aca si\u0119 najbardziej.<\/p>\n<p><a href=\"https:\/\/aristofenster.eu\/pl\/kontakt\/\" style=\"display:inline-block;background:#FFCC00;color:#073C61;padding:13px 24px;font-weight:700;text-decoration:none;border-radius:4px;letter-spacing:.5px\">Popro\u015b o porad\u0119 \u2192<\/a><\/div>\n<h2>Przyk\u0142ad: ile daje lepszy wsp\u00f3\u0142czynnik Uw?<\/h2>\n<p>Dom jednorodzinny ma 15 m\u00b2 okien. Stare okna zespolone maj\u0105 Uw oko\u0142o 2,8, nowe okna z pakietem trzyszybowym 0,8 W\/(m\u00b2K). R\u00f3\u017cnica 2,0 W\/(m\u00b2K) przy 15 m\u00b2 oznacza o 30 wat\u00f3w mniejsze straty ciep\u0142a na ka\u017cdy stopie\u0144 r\u00f3\u017cnicy temperatur. W typowym sezonie grzewczym to w przybli\u017ceniu <strong>2000\u20132500 kWh mniej energii na ogrzewanie rocznie<\/strong> \u2013 w zale\u017cno\u015bci od ceny energii kilkaset z\u0142otych oszcz\u0119dno\u015bci. Do tego dochodzi komfort: wewn\u0119trzna powierzchnia szyby jest cieplejsza, mniej ci\u0105gnie od okna i rzadziej skrapla si\u0119 para.<\/p>\n<p><em>Uwaga: przyk\u0142ad jest uproszczonym szacunkiem. Rzeczywista oszcz\u0119dno\u015b\u0107 zale\u017cy od budynku, sposobu ogrzewania i zysk\u00f3w s\u0142onecznych.<\/em><\/p>\n<h2>Wskaz\u00f3wki do oferty<\/h2>\n<ul>\n<li>Pytaj o wsp\u00f3\u0142czynnik Uw dla Twoich wymiar\u00f3w okien, a nie tylko dla okna referencyjnego.<\/li>\n<li>Zwr\u00f3\u0107 uwag\u0119 na wsp\u00f3\u0142czynnik Ug i ciep\u0142\u0105 ramk\u0119 \u2013 oba bezpo\u015brednio wp\u0142ywaj\u0105 na Uw.<\/li>\n<li>Dobry wsp\u00f3\u0142czynnik Uw ma sens tylko przy szczelnym monta\u017cu. Wi\u0119cej w artykule <a href=\"https:\/\/aristofenster.eu\/pl\/cieply-montaz-okien\/\">Ciep\u0142y monta\u017c okien<\/a>.<\/li>\n<\/ul>\n<p>Nasze okna PCV z pakietem trzyszybowym osi\u0105gaj\u0105 Uw do 0,74 W\/(m\u00b2K) (VEKA Softline 82 MD). Szczeg\u00f3\u0142y znajdziesz na stronie <a href=\"https:\/\/aristofenster.eu\/pl\/produkty\/okna-pcv\/\">Okna PCV<\/a>. R\u00f3\u017cnice mi\u0119dzy szybami opisujemy w artykule <a href=\"https:\/\/aristofenster.eu\/pl\/pakiet-dwuszybowy-czy-trzyszybowy\/\">Pakiet dwuszybowy czy trzyszybowy<\/a>.<\/p>\n<div class=\"af-cta\" style=\"background:#073C61;color:#ffffff;padding:28px 32px;border-radius:6px;margin:36px 0;border-left:6px solid #FFCC00\">\n<p style=\"margin:0 0 8px;font-size:21px;line-height:1.35;font-weight:700;color:#ffffff\">Energooszcz\u0119dne okna w uczciwej cenie<\/p>\n<p style=\"margin:0 0 18px;color:#e6eef4\">Prze\u015blij nam wymiary \u2013 przygotujemy ofert\u0119 z dok\u0142adnymi wsp\u00f3\u0142czynnikami Uw.<\/p>\n<p><a href=\"https:\/\/aristofenster.eu\/pl\/kontakt\/\" style=\"display:inline-block;background:#FFCC00;color:#073C61;padding:13px 24px;font-weight:700;text-decoration:none;border-radius:4px;letter-spacing:.5px\">Popro\u015b o ofert\u0119 \u2192<\/a><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Co oznacza wsp\u00f3\u0142czynnik Uw? Wyja\u015bniamy Ug, Uf i Psi, podajemy wymagania WT 2021 i pokazujemy na przyk\u0142adzie, ile energii cieplnej oszcz\u0119dzaj\u0105 nowe okna.<\/p>\n","protected":false},"author":6,"featured_media":4841,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5124","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-poradnik"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Wsp\u00f3\u0142czynnik Uw okna \u2013 co oznacza? | Aristofenster<\/title>\n<meta name=\"description\" content=\"Wsp\u00f3\u0142czynnik Uw okna wyja\u015bniony: Ug, Uf i ramka ciep\u0142a, wymagania WT 2021 (Uw \u2264 0,9) oraz przyk\u0142ad, ile energii pozwalaj\u0105 zaoszcz\u0119dzi\u0107 nowe okna.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aristofenster.eu\/pl\/wspolczynnik-uw-okna\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Wsp\u00f3\u0142czynnik Uw okna \u2013 co oznacza? 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