{"product_id":"vaillant-ecotec-plus-424-open-vent-heat-only-boiler-10021223-24kw","title":"Vaillant ecoTEC Plus 424 Open Vent Heat Only Boiler | 10021223 | 24kW","description":"\u003c!-- SEO Product Name: Vaillant ecoTEC Plus 424 Open Vent Heat Only Boiler | 10021223 | 24kW --\u003e\n\u003cdiv style=\"font-size: 16px; max-width: 900px;\"\u003e\n\u003cp style=\"margin: 0 0 16px 0; line-height: 1.6;\"\u003eThe \u003cstrong\u003eVaillant ecoTEC Plus 424 (MPN 10021223)\u003c\/strong\u003e is a 24kW \u003cstrong\u003eopen vent (regular\/heat-only) gas boiler\u003c\/strong\u003e, designed for homes running a traditional open-vented system with a hot water cylinder and a cold water storage tank in the loft. It's built for households with \u003cstrong\u003ehigher, more consistent hot water demand across two or more bathrooms\u003c\/strong\u003e, where an open vent system's steady pressure delivery suits the property better than a combi.\u003c\/p\u003e\n\u003cp style=\"margin: 0 0 20px 0; line-height: 1.6;\"\u003eOne of the \u003cstrong style=\"color: #008377cf;\"\u003emost compact open vent boilers Vaillant has developed\u003c\/strong\u003e, the 424 is hand-built at Vaillant's Derbyshire manufacturing plant and comes with a \u003cstrong\u003e5-year guarantee out of the box\u003c\/strong\u003e, extendable to \u003cstrong\u003e10 years\u003c\/strong\u003e when registered with Vaillant Advance and fitted with a boiler protection kit. A \u003cstrong\u003erear flue option\u003c\/strong\u003e and push-fit flue system give installers flexibility to site the boiler in more locations than a top-flue-only design allows.\u003c\/p\u003e\n\u003c!-- Stat strip --\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 12px; margin: 0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #f4faf9; border: 1px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003e94%\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #333;\"\u003eErP Efficiency\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #f4faf9; border: 1px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003e30kW\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #333;\"\u003eMax DHW Output\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #f4faf9; border: 1px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003e1:4.9\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #333;\"\u003eModulation Ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #f4faf9; border: 1px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003e10 Yrs\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #333;\"\u003eWarranty (Advance)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #f4faf9; border: 1px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003eClass 6\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #333;\"\u003eNOx Rating\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background: #f4faf9; border: 1px solid #008377CF; border-radius: 8px; padding: 14px; text-align: center;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; color: #008377cf;\"\u003e23kg\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #333;\"\u003eBoiler Lift Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Callouts --\u003e\n\u003cdiv style=\"background: #fff4f4; border-left: 4px solid #c0392b; border-radius: 6px; padding: 14px 16px; margin: 0 0 14px 0;\"\u003e\n\u003cstrong style=\"color: #c0392b;\"\u003eGas Safe installation required.\u003c\/strong\u003e This is a mains gas appliance and must be installed, commissioned and serviced by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e, in line with Building Regulations Part L and current Gas Safety (Installation and Use) Regulations.\u003c\/div\u003e\n\u003cdiv style=\"background: #fff8ec; border-left: 4px solid #d4900a; border-radius: 6px; padding: 14px 16px; margin: 0 0 14px 0;\"\u003e\n\u003cstrong style=\"color: #d4900a;\"\u003eBoiler-only, open vent system required:\u003c\/strong\u003e This is a \u003cstrong\u003eheat-only (regular) boiler\u003c\/strong\u003e, not a combi or system boiler. It must be installed with an existing or new \u003cstrong\u003eopen-vented cylinder and cold water storage tank\u003c\/strong\u003e — it will not work as a standalone unit and does not provide instant mains-pressure hot water on its own.\u003c\/div\u003e\n\u003c!-- Feature grid --\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 14px; margin: 0 0 24px 0;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; border-radius: 8px; padding: 16px; background: #fff;\"\u003e\n\u003cdiv style=\"color: #008377cf; font-weight: bold; margin-bottom: 6px;\"\u003eCompact, Lightweight Design\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.5; color: #333;\"\u003eAt \u003cstrong\u003e602 × 375 × 320mm and 23kg\u003c\/strong\u003e, it's one of the most compact open vent boilers Vaillant has built, giving installers excellent siting flexibility including standard kitchen cupboards.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; border-radius: 8px; padding: 16px; background: #fff;\"\u003e\n\u003cdiv style=\"color: #008377cf; font-weight: bold; margin-bottom: 6px;\"\u003eRear Flue Option\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.5; color: #333;\"\u003eA \u003cstrong\u003erear flue outlet is available alongside the standard top flue\u003c\/strong\u003e, letting the boiler be installed in situations where a top exit isn't practical.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; border-radius: 8px; padding: 16px; background: #fff;\"\u003e\n\u003cdiv style=\"color: #008377cf; font-weight: bold; margin-bottom: 6px;\"\u003eWide Modulation Range\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.5; color: #333;\"\u003eA \u003cstrong\u003e1:4.9 modulation ratio\u003c\/strong\u003e lets the boiler closely match output to demand, reducing cycling and improving overall energy efficiency compared with a narrower-range appliance.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; border-radius: 8px; padding: 16px; background: #fff;\"\u003e\n\u003cdiv style=\"color: #008377cf; font-weight: bold; margin-bottom: 6px;\"\u003eBuilt-In Frost Protection\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.5; color: #333;\"\u003e\n\u003cstrong\u003eTwo-stage frost protection\u003c\/strong\u003e is built in as standard, keeping the boiler safely operational through cold snaps without extra components.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; border-radius: 8px; padding: 16px; background: #fff;\"\u003e\n\u003cdiv style=\"color: #008377cf; font-weight: bold; margin-bottom: 6px;\"\u003eLarge Backlit Display\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.5; color: #333;\"\u003eA \u003cstrong\u003elarge backlit plain-text display\u003c\/strong\u003e gives clear visibility of boiler status and fault codes even in poor lighting, with push-button programming for straightforward day-to-day use.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 260px; border: 1px solid #ddd; border-radius: 8px; padding: 16px; background: #fff;\"\u003e\n\u003cdiv style=\"color: #008377cf; font-weight: bold; margin-bottom: 6px;\"\u003eEasy Access Servicing\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.5; color: #333;\"\u003e\n\u003cstrong\u003eRemovable side panels\u003c\/strong\u003e give installers and engineers straightforward access during installation, routine maintenance and repair work.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- Spec table --\u003e\n\u003cdiv style=\"border: 1px solid #ddd; border-radius: 8px; overflow: hidden; margin: 0 0 24px 0;\"\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 16px;\"\u003eHeating Performance\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eNominal Heat Output (50\/30°C, condensing)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e6.3–25.7 kW\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eNominal Heat Output (80\/60°C, non-condensing)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e6.1–24.6 kW\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eModulation Ratio\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e1:4.9\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eFlow Temperature Range\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e10–80°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eFlow Temperature Factory Setting\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e75°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 16px;\"\u003eWater Generation\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eMaximum Heat Output for Water Generation\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e30 kW\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eApproximate Condensate Volume (50\/30°C)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e2.47 litres\/hr\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 16px;\"\u003ePhysical \u0026amp; Connections\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eDimensions (H × W × D)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e602 × 375 × 320 mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eBoiler Lift Weight (dry)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e23.0 kg\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eGas Inlet Connection\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e15mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eHeating Flow \u0026amp; Return Connections\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e22mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eHeat Exchanger Material\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003eAluminium\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 16px;\"\u003eEmissions \u0026amp; Noise\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eNOx Class\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003eClass 6\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eNOx Emissions (EN 15502-2-1)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e39 mg\/kWh\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eErP Efficiency\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e94%\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eErP Sound Power\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e52 dB(A)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 16px;\"\u003eFlueing Options\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eMax Horizontal Flue (60\/100)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e10 m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eMax Vertical Flue (60\/100)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e10 m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eMax Horizontal Flue (80\/125)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e25 m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eMax Vertical Flue (80\/125)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e25 m\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eRear Flue Option\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003eYes\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 16px;\"\u003eCompliance \u0026amp; Coverage\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eManufacturer Part Number (MPN)\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e0010021223\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eGas Council Number\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e41-694-16\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px; background: #f9f9f9; border-bottom: 1px solid #eee;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eErP Rating\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003eA (heating)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; padding: 10px 16px;\"\u003e\n\u003cdiv style=\"flex: 1; color: #555;\"\u003eWarranty\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; font-weight: 600;\"\u003e5 years standard; 10 years with Vaillant Advance registration and boiler protection kit\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- FAQ --\u003e\n\u003cdiv style=\"margin: 0 0 8px 0;\"\u003e\n\u003cdetails style=\"border: 1px solid #ddd; border-radius: 6px; margin-bottom: 8px;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; cursor: pointer; border-radius: 6px;\"\u003eWhat's the difference between an open vent boiler and a combi boiler?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; line-height: 1.6;\"\u003eAn \u003cstrong\u003eopen vent (regular) boiler only heats water\u003c\/strong\u003e — it needs a separate hot water cylinder and a cold water storage tank, typically in the loft, to store and deliver hot water. A combi boiler heats water on demand with no cylinder needed. Open vent systems suit homes with \u003cstrong\u003ehigher simultaneous hot water demand across multiple bathrooms\u003c\/strong\u003e, since output isn't limited by mains flow rate.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #ddd; border-radius: 6px; margin-bottom: 8px;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; cursor: pointer; border-radius: 6px;\"\u003eDo I need a cylinder and tank to use this boiler?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; line-height: 1.6;\"\u003eYes. This is a \u003cstrong\u003eheat-only boiler\u003c\/strong\u003e supplied without a cylinder — it must be connected to an existing or new \u003cstrong\u003eopen-vented hot water cylinder and a cold water storage tank\u003c\/strong\u003e to provide domestic hot water. It cannot function as a standalone unit.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #ddd; border-radius: 6px; margin-bottom: 8px;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; cursor: pointer; border-radius: 6px;\"\u003eHow do I get the full 10-year warranty?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; line-height: 1.6;\"\u003eThe boiler ships with a \u003cstrong\u003e5-year guarantee out of the box\u003c\/strong\u003e. To extend this to \u003cstrong\u003e10 years, it must be registered with Vaillant Advance and fitted with a compatible boiler protection kit\u003c\/strong\u003e at installation — confirm current eligibility and registration steps with Vaillant before completing the install.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #ddd; border-radius: 6px; margin-bottom: 8px;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; cursor: pointer; border-radius: 6px;\"\u003eCan the flue exit through the rear instead of the top?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; line-height: 1.6;\"\u003eYes. The ecoTEC Plus 424 \u003cstrong\u003esupports a rear flue option in addition to the standard top flue\u003c\/strong\u003e, giving installers more flexibility when siting the boiler in properties where a top exit isn't practical.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #ddd; border-radius: 6px;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; cursor: pointer; border-radius: 6px;\"\u003eWho can install this boiler?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; line-height: 1.6;\"\u003eInstallation, commissioning and servicing must be carried out by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e, in line with UK Gas Safety (Installation and Use) Regulations and Building Regulations Part L.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Vaillant","offers":[{"title":"Default Title","offer_id":65915729707357,"sku":"10021223","price":1595.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/VaillantecoTECPlus424OpenVentHeatOnlyBoiler.jpg?v=1789371884","url":"https:\/\/qualityheating.co.uk\/products\/vaillant-ecotec-plus-424-open-vent-heat-only-boiler-10021223-24kw","provider":"AIZO Quality Heating","version":"1.0","type":"link"}