{"id":19610,"date":"2026-04-10T19:31:05","date_gmt":"2026-04-10T16:31:05","guid":{"rendered":"https:\/\/www.tastyfood.top\/?p=19610"},"modified":"2026-04-10T19:31:06","modified_gmt":"2026-04-10T16:31:06","slug":"%f0%9f%94%a5-why-cant-you-install-a-90-elbow-on-a-chimney-proper-chimney-installation-is-the-basis-for-the-safety-and-efficiency-of-a-heating-system-one-of-the-important-points-during-instal","status":"publish","type":"post","link":"https:\/\/www.tastyfood.top\/?p=19610","title":{"rendered":"\ud83d\udd25 Why can’t you install a 90\u00b0 elbow on a chimney? Proper chimney installation is the basis for the safety and efficiency of a heating system. One of the important points during installation is the choice of the pipe bend angle"},"content":{"rendered":"\n

Finally, we have come across a topic where “fun” goes aside and pure physics and safety come into play. While it is just fun with T-shirts with holes or blue eggs, a bad decision with a chimney can end in a fire or poisoning.<\/p>\n\n\n\n

Installing a 90\u00b0 elbow directly on the flue is considered a major offense in the heating industry, for several very logical reasons:<\/p>\n\n\n\n

    \n
  1. Drastic reduction in chimney draft
    The chimney works on the principle of pressure difference. The flue gases want to rise upwards. As soon as they encounter a sharp 90\u00b0 angle, turbulence occurs and the gas flow slows down sharply.<\/li>\n<\/ol>\n\n\n\n

    Imagine it like a car that has to take a right-angle bend at full speed – it almost has to stop.
    The result? The stove “doesn’t pull”, it does not heat well and smoke can return to the room.<\/p>\n\n\n\n

      \n
    1. Soot and tar deposits (fire risk)
      In a sharp bend, the flue gases cool down and slow down, which leads to massive soot deposits.<\/li>\n<\/ol>\n\n\n\n

      Soot is flammable. A deposit forms in a 90\u00b0 bend, which can sooner or later start to burn (so-called chimney burnout).
      Moreover, cleaning such a bend is a nightmare, because it is very difficult to get a brush over the sharp corner.<\/p>\n\n\n\n

        \n
      1. Condensation accumulation
        Flue gases contain moisture. Condensation occurs more quickly in a sharp bend. This liquid (often an aggressive acidic mixture) remains in the bend, corrodes the pipe material and can flow out through the joint onto the floor or wall.<\/li>\n<\/ol>\n\n\n\n

        What is the right way?
        Instead of one \u201ckiller\u201d 90\u00b0 elbow, use:<\/p>\n\n\n\n

        Two 45\u00b0 elbows: They create a smoother run-up (the so-called pants), the flue gases do not lose speed and the soot has nowhere to get trapped.
        An elbow with a cleaning hole: If there has to be an angle, it must have an inspection door so that you can see what is going on inside.
        The golden rule:
        The fewer bends and the gentler the angles, the safer the home. If someone tells you that \u201cwe just dig in there at a right angle because that\u2019s how it comes out to the wall\u201d, you\u2019d better send them to dye their eggs with turmeric.<\/p>\n\n\n\n

        Are you building a fireplace or just adding another important fact to your collection of internet wisdom?<\/p>\n","protected":false},"excerpt":{"rendered":"

        Finally, we have come across a topic where “fun” goes aside and pure physics and safety come into play. While it is just fun with T-shirts with holes or blue […]<\/p>\n","protected":false},"author":2,"featured_media":19611,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-19610","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-nteresting"],"_links":{"self":[{"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=\/wp\/v2\/posts\/19610","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=19610"}],"version-history":[{"count":1,"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=\/wp\/v2\/posts\/19610\/revisions"}],"predecessor-version":[{"id":19612,"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=\/wp\/v2\/posts\/19610\/revisions\/19612"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=\/wp\/v2\/media\/19611"}],"wp:attachment":[{"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=19610"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=19610"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tastyfood.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=19610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}