{"product_id":"vaillant-ecotech-435-heat-only-with-horizontal-flue-15mm-scale-reducer","title":"Vaillant Ecotech 435 Heat Only with Horizontal Flue \u0026 15mm Scale Reducer","description":"\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-6a5c8076-6870-83eb-ada8-d94fc8646e45-8\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-6a5c8076-6870-83eb-ada8-d94fc8646e45-8\" data-turn-id-container=\"request-6a5c8076-6870-83eb-ada8-d94fc8646e45-8\" data-testid=\"conversation-turn-40\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-15 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"a9c7a690-d042-4af0-af6e-4b056c9ac28d\" data-turn-start-message=\"true\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full light markdown-new-styling\"\u003e\n\u003cp data-start=\"241\" data-end=\"762\"\u003eThe \u003cstrong data-start=\"245\" data-end=\"290\"\u003eVaillant ecoTEC Plus 435 Open Vent Boiler\u003c\/strong\u003e is a premium \u003cstrong data-start=\"304\" data-end=\"333\"\u003e35kW heat-only gas boiler\u003c\/strong\u003e designed for traditional open-vented central heating systems. Combining high heating performance with advanced condensing technology, it provides efficient, reliable, and quiet operation for larger homes with higher heating demands. It is designed to work alongside a separate \u003cstrong data-start=\"611\" data-end=\"633\"\u003ehot water cylinder\u003c\/strong\u003e and \u003cstrong data-start=\"638\" data-end=\"665\"\u003ecold water storage tank\u003c\/strong\u003e, making it an ideal replacement for older regular boilers. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"764\" data-end=\"980\"\u003eIts compact dimensions, flexible installation options, and intuitive controls make the ecoTEC Plus 435 an excellent choice for homeowners looking for dependable heating performance without compromising on efficiency.\u003c\/p\u003e\n\u003chr data-start=\"982\" data-end=\"985\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"987\" data-end=\"1002\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"1004\" data-end=\"1663\"\u003e\n\u003cli data-section-id=\"hz9tr9\" data-start=\"1004\" data-end=\"1043\"\u003e35kW heat-only (Open Vent) gas boiler\u003c\/li\u003e\n\u003cli data-section-id=\"bdylec\" data-start=\"1044\" data-end=\"1068\"\u003eFuel Type: Natural Gas\u003c\/li\u003e\n\u003cli data-section-id=\"p1d3wk\" data-start=\"1069\" data-end=\"1123\"\u003eDesigned for traditional open-vented heating systems\u003c\/li\u003e\n\u003cli data-section-id=\"1hz6ld0\" data-start=\"1124\" data-end=\"1163\"\u003eHigh-efficiency condensing technology\u003c\/li\u003e\n\u003cli data-section-id=\"1kd8wkc\" data-start=\"1164\" data-end=\"1200\"\u003eErP A Rated for heating efficiency\u003c\/li\u003e\n\u003cli data-section-id=\"fxzaq2\" data-start=\"1201\" data-end=\"1230\"\u003eCompact wall-mounted design\u003c\/li\u003e\n\u003cli data-section-id=\"2v205\" data-start=\"1231\" data-end=\"1259\"\u003eStylish, modern appearance\u003c\/li\u003e\n\u003cli data-section-id=\"q33gfy\" data-start=\"1260\" data-end=\"1297\"\u003eBuilt-in two-stage frost protection\u003c\/li\u003e\n\u003cli data-section-id=\"1vd5yiy\" data-start=\"1298\" data-end=\"1358\"\u003ePush-button controls with comprehensive diagnostic display\u003c\/li\u003e\n\u003cli data-section-id=\"5nn7fd\" data-start=\"1359\" data-end=\"1420\"\u003eCompatible with the full range of Vaillant heating controls\u003c\/li\u003e\n\u003cli data-section-id=\"r7rkc6\" data-start=\"1421\" data-end=\"1467\"\u003eFront-access components for easier servicing\u003c\/li\u003e\n\u003cli data-section-id=\"gwqdf7\" data-start=\"1468\" data-end=\"1509\"\u003eStandard 5-year manufacturer's warranty\u003c\/li\u003e\n\u003cli data-section-id=\"1chbmfm\" data-start=\"1510\" data-end=\"1663\"\u003eUp to 10-year warranty available when installed by a Vaillant Advance Installer (subject to terms and conditions) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1665\" data-end=\"1668\"\u003e\n\u003ch2 data-section-id=\"17rdhp4\" data-start=\"1670\" data-end=\"1713\"\u003eDesigned for Traditional Heating Systems\u003c\/h2\u003e\n\u003cp data-start=\"1715\" data-end=\"1906\"\u003eThe ecoTEC Plus 435 is specifically engineered for homes with an \u003cstrong data-start=\"1780\" data-end=\"1818\"\u003eopen-vented central heating system\u003c\/strong\u003e, operating alongside a separate \u003cstrong data-start=\"1851\" data-end=\"1873\"\u003ehot water cylinder\u003c\/strong\u003e and \u003cstrong data-start=\"1878\" data-end=\"1905\"\u003ecold water storage tank\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"1908\" data-end=\"2130\"\u003eUnlike a combi boiler, this model focuses exclusively on central heating. It is an excellent choice for larger properties where stored hot water and high heating capacity are required. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"2132\" data-end=\"2135\"\u003e\n\u003ch2 data-section-id=\"xvngn3\" data-start=\"2137\" data-end=\"2173\"\u003ePowerful 35kW Heating Performance\u003c\/h2\u003e\n\u003cp data-start=\"2175\" data-end=\"2383\"\u003eDelivering a \u003cstrong data-start=\"2188\" data-end=\"2219\"\u003e35kW central heating output\u003c\/strong\u003e, the ecoTEC Plus 435 is the most powerful model in the ecoTEC Plus Open Vent range, making it ideal for large homes and properties with extensive radiator systems.\u003c\/p\u003e\n\u003cp data-start=\"2385\" data-end=\"2547\"\u003eIts intelligent burner modulation automatically adjusts the heating output to match demand, helping improve efficiency while reducing unnecessary gas consumption.\u003c\/p\u003e\n\u003cp data-start=\"2549\" data-end=\"2752\"\u003eThe boiler provides a heating output range of approximately \u003cstrong data-start=\"2609\" data-end=\"2628\"\u003e7.5kW to 37.1kW\u003c\/strong\u003e in condensing mode, ensuring reliable and economical performance throughout the year. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"2754\" data-end=\"2757\"\u003e\n\u003ch2 data-section-id=\"jc49um\" data-start=\"2759\" data-end=\"2782\"\u003eCompact Installation\u003c\/h2\u003e\n\u003cp data-start=\"2784\" data-end=\"2905\"\u003eDespite its powerful output, the ecoTEC Plus 435 retains a compact design that offers excellent installation flexibility.\u003c\/p\u003e\n\u003ch3 data-section-id=\"bpec4l\" data-start=\"2907\" data-end=\"2921\"\u003eDimensions\u003c\/h3\u003e\n\u003cul data-start=\"2923\" data-end=\"2980\"\u003e\n\u003cli data-section-id=\"1ki961l\" data-start=\"2923\" data-end=\"2942\"\u003eHeight: \u003cstrong data-start=\"2933\" data-end=\"2942\"\u003e602mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1ots3c5\" data-start=\"2943\" data-end=\"2961\"\u003eWidth: \u003cstrong data-start=\"2952\" data-end=\"2961\"\u003e375mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"9c15ny\" data-start=\"2962\" data-end=\"2980\"\u003eDepth: \u003cstrong data-start=\"2971\" data-end=\"2980\"\u003e320mm\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2982\" data-end=\"3197\"\u003eIts wall-mounted construction makes it suitable for installation in kitchens, utility rooms, and airing cupboards while allowing convenient access for servicing and maintenance. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"3199\" data-end=\"3202\"\u003e\n\u003ch2 data-section-id=\"1u2wg06\" data-start=\"3204\" data-end=\"3231\"\u003eEnergy Efficient Heating\u003c\/h2\u003e\n\u003cp data-start=\"3233\" data-end=\"3540\"\u003eBuilt with Vaillant's advanced condensing technology, the ecoTEC Plus 435 achieves an \u003cstrong data-start=\"3319\" data-end=\"3335\"\u003eErP A Rating\u003c\/strong\u003e for central heating efficiency. Intelligent modulation technology optimises gas consumption while maintaining stable indoor temperatures and reducing operating costs. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"3542\" data-end=\"3545\"\u003e\n\u003ch2 data-section-id=\"bvzj9p\" data-start=\"3547\" data-end=\"3585\"\u003eSmart Heating Control Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"3587\" data-end=\"3784\"\u003eThe ecoTEC Plus 435 is fully compatible with Vaillant's range of smart thermostats and heating controls, allowing homeowners to optimise heating schedules, improve efficiency, and increase comfort.\u003c\/p\u003e\n\u003cp data-start=\"3786\" data-end=\"3998\"\u003eIt can also be integrated into selected hybrid heating systems alongside compatible Vaillant renewable technologies, offering greater flexibility for future heating upgrades. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"4000\" data-end=\"4003\"\u003e\n\u003ch2 data-section-id=\"7ykkcp\" data-start=\"4005\" data-end=\"4043\"\u003eReliable Performance All Year Round\u003c\/h2\u003e\n\u003cp data-start=\"4045\" data-end=\"4373\"\u003eDesigned for long-term reliability, the ecoTEC Plus 435 features built-in frost protection, comprehensive onboard diagnostics, and intuitive push-button controls. Its robust engineering and quiet operation make it a dependable solution for demanding heating systems throughout every season. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"4375\" data-end=\"4378\"\u003e\n\u003ch2 data-section-id=\"15okmn6\" data-start=\"4380\" data-end=\"4407\"\u003eWarranty \u0026amp; Peace of Mind\u003c\/h2\u003e\n\u003cp data-start=\"4409\" data-end=\"4718\"\u003eThe Vaillant ecoTEC Plus 435 includes a \u003cstrong data-start=\"4449\" data-end=\"4483\"\u003e5-year manufacturer's warranty\u003c\/strong\u003e as standard. When installed and registered by an eligible \u003cstrong data-start=\"4542\" data-end=\"4572\"\u003eVaillant Advance Installer\u003c\/strong\u003e, the warranty may be extended to \u003cstrong data-start=\"4606\" data-end=\"4618\"\u003e10 years\u003c\/strong\u003e, providing additional long-term protection and peace of mind. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"4720\" data-end=\"4723\"\u003e\n\u003ch2 data-section-id=\"1nxbz66\" data-start=\"4725\" data-end=\"4768\"\u003eWhy Choose the Vaillant ecoTEC Plus 435?\u003c\/h2\u003e\n\u003cul data-start=\"4770\" data-end=\"5212\" data-is-last-node=\"\" data-is-only-node=\"\"\u003e\n\u003cli data-section-id=\"1m0ulsp\" data-start=\"4770\" data-end=\"4806\"\u003ePowerful 35kW heat-only gas boiler\u003c\/li\u003e\n\u003cli data-section-id=\"nto3ov\" data-start=\"4807\" data-end=\"4864\"\u003eIdeal for large traditional open-vented heating systems\u003c\/li\u003e\n\u003cli data-section-id=\"1eozaro\" data-start=\"4865\" data-end=\"4900\"\u003eCompact wall-mounted installation\u003c\/li\u003e\n\u003cli data-section-id=\"1hz6ld0\" data-start=\"4901\" data-end=\"4940\"\u003eHigh-efficiency condensing technology\u003c\/li\u003e\n\u003cli data-section-id=\"172bi7k\" data-start=\"4941\" data-end=\"4966\"\u003eErP A Rated performance\u003c\/li\u003e\n\u003cli data-section-id=\"uobhc0\" data-start=\"4967\" data-end=\"5004\"\u003eSmart heating control compatibility\u003c\/li\u003e\n\u003cli data-section-id=\"1und88i\" data-start=\"5005\" data-end=\"5035\"\u003eQuiet and reliable operation\u003c\/li\u003e\n\u003cli data-section-id=\"161tg6h\" data-start=\"5036\" data-end=\"5069\"\u003eEasy installation and servicing\u003c\/li\u003e\n\u003cli data-section-id=\"owus8o\" data-start=\"5070\" data-end=\"5104\"\u003eUp to 10-year warranty available\u003c\/li\u003e\n\u003cli data-section-id=\"1ylsf0l\" data-start=\"5105\" data-end=\"5212\" data-is-last-node=\"\"\u003eTrusted Vaillant engineering with outstanding long-term reliability \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-conversation-screenshot-content=\"\" class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Mağazam","offers":[{"title":"Default Title","offer_id":49033161867419,"sku":null,"price":1856.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0773\/2091\/3051\/files\/ecotec-ov_6_1.webp?v=1784456698","url":"https:\/\/boilerlines.co.uk\/products\/vaillant-ecotech-435-heat-only-with-horizontal-flue-15mm-scale-reducer","provider":"Boiler Lines","version":"1.0","type":"link"}