{"product_id":"vaillant-80-125mm-horizontal-flue-kit-303209-ecotec-compatible","title":"Vaillant 80\/125mm Horizontal Flue Kit | 303209 | ecoTEC Compatible","description":"\u003cdiv style=\"font-size: 16px; max-width: 900px; margin: 0 auto; font-family: Arial, Helvetica, sans-serif; color: #222; line-height: 1.6;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eVaillant 80\/125mm Horizontal Flue Kit\u003c\/strong\u003e is a complete \u003cstrong\u003econcentric air\/flue solution\u003c\/strong\u003e for compatible \u003cstrong\u003eVaillant ecoTEC\u003c\/strong\u003e boiler installations. Supplied with the \u003cstrong\u003ehorizontal terminal duct, 87° boiler elbow and wall rosettes\u003c\/strong\u003e, it provides a neat, reliable route for combustion air intake and safe dispersal of flue gases through an external wall.\u003c\/p\u003e\n\u003cp\u003eDesigned for professional installation, this \u003cstrong\u003e80\/125mm flue system\u003c\/strong\u003e supports extended horizontal runs when used with approved Vaillant extensions and elbows. The \u003cstrong\u003eroom sealed concentric design\u003c\/strong\u003e helps maintain efficient boiler operation while keeping flue components protected and neatly finished inside and outside the property.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 12px; margin: 24px 0;\"\u003e\n\u003cdiv style=\"flex: 1 1 130px; min-width: 130px; border: 2px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003e80\/125mm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eConcentric flue size\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 130px; min-width: 130px; border: 2px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003e87°\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eBoiler elbow included\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 130px; min-width: 130px; border: 2px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003e970mm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eTerminal duct length\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 130px; min-width: 130px; border: 2px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003eecoTEC\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eCompatible flue system\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 130px; min-width: 130px; border: 2px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003e303209\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eVaillant part number\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 130px; min-width: 130px; border: 2px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003eComplete\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eHorizontal flue kit\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 5px solid #008377CF; background: #f2faf8; padding: 14px 16px; border-radius: 6px; margin: 20px 0;\"\u003e\n\u003cstrong style=\"color: #008377cf;\"\u003eInstallation information:\u003c\/strong\u003e The horizontal flue must be installed with the correct \u003cstrong\u003edownward gradient back to the boiler\u003c\/strong\u003e to allow condensate management, in accordance with the boiler and flue installation instructions.\u003c\/div\u003e\n\u003cdiv style=\"border-left: 5px solid #d97706; background: #fff8ec; padding: 14px 16px; border-radius: 6px; margin: 20px 0;\"\u003e\n\u003cstrong style=\"color: #b45309;\"\u003eCompatibility note:\u003c\/strong\u003e This kit is intended for \u003cstrong\u003eVaillant 80\/125mm concentric flue systems\u003c\/strong\u003e. Always confirm the required flue configuration, maximum permissible length and boiler connection details against the installation instructions for the specific appliance.\u003c\/div\u003e\n\u003cdiv style=\"border-left: 5px solid #dc2626; background: #fef2f2; padding: 14px 16px; border-radius: 6px; margin: 20px 0;\"\u003e\n\u003cstrong style=\"color: #b91c1c;\"\u003eSafety and compliance:\u003c\/strong\u003e Flue installation must be carried out by a \u003cstrong\u003ecompetent, suitably qualified installer\u003c\/strong\u003e in accordance with current UK building regulations, manufacturer instructions and applicable gas safety requirements.\u003c\/div\u003e\n\u003cdiv style=\"margin: 28px 0 10px; font-size: 20px; font-weight: bold; color: #008377cf; border-bottom: 2px solid #008377CF; padding-bottom: 6px;\"\u003eKey Features\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 24px;\"\u003e\n\u003cdiv style=\"flex: 1 1 270px; min-width: 270px; border: 1px solid #008377CF; border-top: 4px solid #008377CF; border-radius: 8px; padding: 14px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px;\"\u003eComplete Horizontal Flue Kit\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eIncludes the \u003cstrong\u003ehorizontal terminal duct, 87° elbow, inner and outer rosettes\u003c\/strong\u003e for a coordinated wall through installation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 270px; min-width: 270px; border: 1px solid #008377CF; border-top: 4px solid #008377CF; border-radius: 8px; padding: 14px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px;\"\u003e80\/125mm Concentric Design\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eThe \u003cstrong\u003econcentric air\/flue arrangement\u003c\/strong\u003e supplies combustion air and expels products of combustion through a single external wall penetration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 270px; min-width: 270px; border: 1px solid #008377CF; border-top: 4px solid #008377CF; border-radius: 8px; padding: 14px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px;\"\u003eVaillant ecoTEC Compatibility\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eManufactured for use with compatible \u003cstrong\u003eVaillant ecoTEC boilers\u003c\/strong\u003e that specify an \u003cstrong\u003e80\/125mm flue connection\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 270px; min-width: 270px; border: 1px solid #008377CF; border-top: 4px solid #008377CF; border-radius: 8px; padding: 14px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px;\"\u003eExtended Run Capability\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eCan form part of a longer \u003cstrong\u003ehorizontal flue run\u003c\/strong\u003e using approved Vaillant extensions, subject to the maximum length and elbow allowances stated in the appliance instructions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 270px; min-width: 270px; border: 1px solid #008377CF; border-top: 4px solid #008377CF; border-radius: 8px; padding: 14px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px;\"\u003eNeat Internal and External Finish\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eSupplied \u003cstrong\u003erosettes\u003c\/strong\u003e help deliver a tidy finish where the flue passes through the wall, supporting a professional installation appearance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 270px; min-width: 270px; border: 1px solid #008377CF; border-top: 4px solid #008377CF; border-radius: 8px; padding: 14px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px;\"\u003eGenuine Vaillant Component\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eA \u003cstrong\u003egenuine Vaillant flue accessory\u003c\/strong\u003e, identified by part number \u003cstrong\u003e303209\u003c\/strong\u003e, designed to integrate with the manufacturer’s flue system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin: 28px 0 10px; font-size: 20px; font-weight: bold; color: #008377cf; border-bottom: 2px solid #008377CF; padding-bottom: 6px;\"\u003eTechnical Specifications\u003c\/div\u003e\n\u003cdiv style=\"border: 2px solid #008377CF; border-radius: 8px; overflow: hidden; margin-bottom: 24px;\"\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; padding: 10px 14px;\"\u003eProduct Identification\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #ffffff;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eBrand\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003eVaillant\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #f7fbfa;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eManufacturer part number (MPN)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003e303209\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #ffffff;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eEAN \/ barcode\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003e4024074343432\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #f7fbfa;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eProduct type\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003eHorizontal concentric flue kit\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; padding: 10px 14px;\"\u003eFlue System\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #ffffff;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eFlue diameter\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003e80\/125mm concentric\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #f7fbfa;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eFlue orientation\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003eHorizontal\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #ffffff;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eTerminal duct length\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003e970mm to face of outer wall\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #f7fbfa;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eIncluded elbow\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003e87° boiler elbow\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #ffffff;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eIncluded rosettes\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003eInner and outer wall rosettes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; padding: 10px 14px;\"\u003eCompatibility and Installation\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #ffffff;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eCompatible system\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003eVaillant 80\/125mm concentric flue systems\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #f7fbfa;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eTypical application\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003eCompatible Vaillant ecoTEC boiler installations\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #ffffff;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eInstallation gradient\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003eDownward gradient back to the boiler, as specified by Vaillant\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #f7fbfa;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eInstaller requirement\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003eSuitably qualified competent installer\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; font-weight: bold; padding: 10px 14px;\"\u003ePhysical Details\u003c\/div\u003e\n\u003cdiv style=\"display: flex; border-bottom: 1px solid #d9d9d9; background: #ffffff;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eApproximate weight\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003e5.223kg\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; background: #f7fbfa;\"\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px; font-weight: bold;\"\u003eFinish\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; padding: 10px 14px;\"\u003eStandard white concentric flue finish\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin: 28px 0 10px; font-size: 20px; font-weight: bold; color: #008377cf; border-bottom: 2px solid #008377CF; padding-bottom: 6px;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdetails style=\"border: 1px solid #008377CF; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #ffffff; font-weight: bold; padding: 12px 14px; cursor: pointer;\"\u003eWhat is included with this Vaillant 80\/125mm horizontal flue kit?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eThe kit includes the \u003cstrong\u003ehorizontal terminal duct, 87° boiler elbow, inner rosette and outer rosette\u003c\/strong\u003e, providing the core components for a horizontal wall through flue installation.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #008377CF; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #ffffff; font-weight: bold; padding: 12px 14px; cursor: pointer;\"\u003eWhich boilers is this flue kit compatible with?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eIt is designed for \u003cstrong\u003eVaillant 80\/125mm concentric flue systems\u003c\/strong\u003e and is commonly used with compatible \u003cstrong\u003eVaillant ecoTEC\u003c\/strong\u003e appliances. Always check the specific boiler’s installation instructions to confirm flue type, connection and maximum run length.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #008377CF; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #ffffff; font-weight: bold; padding: 12px 14px; cursor: pointer;\"\u003eCan the flue run be extended?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eYes, the system can generally be extended using approved \u003cstrong\u003eVaillant 80\/125mm flue extensions and elbows\u003c\/strong\u003e. The maximum permissible flue length is reduced by each additional elbow, so the final configuration must be calculated from the appliance manufacturer’s instructions.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #008377CF; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #ffffff; font-weight: bold; padding: 12px 14px; cursor: pointer;\"\u003eDoes the flue need to be installed at an angle?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eYes. The horizontal flue should be installed with the required \u003cstrong\u003edownward gradient back towards the boiler\u003c\/strong\u003e to support correct condensate handling and comply with the installation instructions.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #008377CF; border-radius: 8px; margin-bottom: 10px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #ffffff; font-weight: bold; padding: 12px 14px; cursor: pointer;\"\u003eWho should install this flue kit?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eInstallation should be completed by a \u003cstrong\u003ecompetent, suitably qualified heating engineer\u003c\/strong\u003e, following the boiler and flue manufacturer’s instructions along with current UK regulations and best practice.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Vaillant","offers":[{"title":"Default Title","offer_id":67633463361926,"sku":"303209","price":179.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/Vaillant_80_125mm_Horizontal_Flue_Kit_1.jpg?v=1792154763","url":"https:\/\/qualityheating.co.uk\/products\/vaillant-80-125mm-horizontal-flue-kit-303209-ecotec-compatible","provider":"AIZO Quality Heating","version":"1.0","type":"link"}