{"product_id":"worcester-bosch-21ri-heat-only-boiler-including-flue-15mm-scale-reducer","title":"Worcester Bosch 21Ri Heat Only Boiler Including Flue \u0026 15mm Scale Reducer","description":"\u003cdiv class=\"product__description\"\u003e\n\u003cdiv class=\"product-description-extended\"\u003e\n\u003cdiv class=\"product__description\"\u003e\n\u003cdiv class=\"product-description-extended\"\u003e\n\u003cdiv class=\"product__description\"\u003e\n\u003cdiv class=\"product-description-extended\"\u003e\n\u003cp data-start=\"81\" data-end=\"587\" class=\"PDq2pG_selectionAnchorContainer\"\u003eThe \u003cstrong data-start=\"85\" data-end=\"162\"\u003eWorcester Bosch 21Ri Heat Only Boiler Including Flue \u0026amp; 15mm Scale Reducer\u003c\/strong\u003e is a compact and highly efficient heating package designed for homes with a traditional open-vent or conventional heating system. Supplied with a \u003cstrong data-start=\"309\" data-end=\"332\"\u003ehorizontal flue kit\u003c\/strong\u003e and a \u003cstrong data-start=\"339\" data-end=\"361\"\u003e15mm Scale Reducer\u003c\/strong\u003e, this complete package provides dependable central heating while helping protect the boiler against limescale build-up in hard water areas, ensuring long-term performance and reliability. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003cspan aria-hidden=\"true\" class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"589\" data-end=\"972\"\u003ePart of the trusted \u003cstrong data-start=\"609\" data-end=\"641\"\u003eWorcester Bosch Greenstar Ri\u003c\/strong\u003e range, the \u003cstrong data-start=\"653\" data-end=\"661\"\u003e21Ri\u003c\/strong\u003e is ideal for properties with an existing hot water cylinder and cold water storage tank. Its compact cupboard-fit design, quiet operation, and compatibility with modern heating controls make it an excellent choice for replacement installations and heating system upgrades. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"974\" data-end=\"977\"\u003e\n\u003ch2 data-section-id=\"1ma7m6t\" data-start=\"979\" data-end=\"994\"\u003eKey Features\u003c\/h2\u003e\n\u003cul data-start=\"996\" data-end=\"1677\"\u003e\n\u003cli data-section-id=\"6757lr\" data-start=\"996\" data-end=\"1029\"\u003e21kW Heat Only (Regular) Boiler\u003c\/li\u003e\n\u003cli data-section-id=\"mxek2d\" data-start=\"1030\" data-end=\"1064\"\u003eIncludes \u003cstrong data-start=\"1041\" data-end=\"1064\"\u003eHorizontal Flue Kit\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1sqr91l\" data-start=\"1065\" data-end=\"1098\"\u003eIncludes \u003cstrong data-start=\"1076\" data-end=\"1098\"\u003e15mm Scale Reducer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"778pqs\" data-start=\"1099\" data-end=\"1127\"\u003e\n\u003cstrong data-start=\"1101\" data-end=\"1115\"\u003eFuel Type:\u003c\/strong\u003e Natural Gas\u003c\/li\u003e\n\u003cli data-section-id=\"cyluwr\" data-start=\"1128\" data-end=\"1185\"\u003eDesigned for open-vent and conventional heating systems\u003c\/li\u003e\n\u003cli data-section-id=\"1p78939\" data-start=\"1186\" data-end=\"1254\"\u003eRequires a separate hot water cylinder and cold water storage tank\u003c\/li\u003e\n\u003cli data-section-id=\"ufviff\" data-start=\"1255\" data-end=\"1284\"\u003eErP \u003cstrong data-start=\"1261\" data-end=\"1272\"\u003eA Rated\u003c\/strong\u003e for heating\u003c\/li\u003e\n\u003cli data-section-id=\"1stx89z\" data-start=\"1285\" data-end=\"1320\"\u003eUp to \u003cstrong data-start=\"1293\" data-end=\"1320\"\u003e92% seasonal efficiency\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"bg2k3b\" data-start=\"1321\" data-end=\"1350\"\u003eCompact cupboard-fit design\u003c\/li\u003e\n\u003cli data-section-id=\"l6w89a\" data-start=\"1351\" data-end=\"1383\"\u003eMulti-directional flue options\u003c\/li\u003e\n\u003cli data-section-id=\"50y3yf\" data-start=\"1384\" data-end=\"1408\"\u003eEasyControl compatible\u003c\/li\u003e\n\u003cli data-section-id=\"gb5uwd\" data-start=\"1409\" data-end=\"1427\"\u003eSolar compatible\u003c\/li\u003e\n\u003cli data-section-id=\"40le43\" data-start=\"1428\" data-end=\"1471\"\u003eSimple fascia-mounted temperature control\u003c\/li\u003e\n\u003cli data-section-id=\"vvfo75\" data-start=\"1472\" data-end=\"1489\"\u003eQuiet operation\u003c\/li\u003e\n\u003cli data-section-id=\"uo9bii\" data-start=\"1490\" data-end=\"1677\"\u003e\n\u003cstrong data-start=\"1492\" data-end=\"1533\"\u003eUp to 10-Year manufacturer's warranty\u003c\/strong\u003e (subject to installation, registration, use of a Worcester Bosch system filter, and manufacturer's terms) \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1679\" data-end=\"1682\"\u003e\n\u003ch2 data-section-id=\"1k784zy\" data-start=\"1684\" data-end=\"1724\"\u003eIdeal for Traditional Heating Systems\u003c\/h2\u003e\n\u003cp data-start=\"1726\" data-end=\"2112\"\u003eThe \u003cstrong data-start=\"1730\" data-end=\"1771\"\u003eWorcester Bosch 21Ri Heat Only Boiler\u003c\/strong\u003e is ideal for \u003cstrong data-start=\"1785\" data-end=\"1816\"\u003esmall to medium-sized homes\u003c\/strong\u003e that already have a traditional heating system with a separate hot water cylinder and cold water storage tank. Heat only boilers are particularly suited to replacing existing regular boilers while retaining the current system pipework and hot water storage. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2114\" data-end=\"2255\"\u003eThe included \u003cstrong data-start=\"2127\" data-end=\"2149\"\u003e15mm Scale Reducer\u003c\/strong\u003e helps minimise limescale build-up, making this package especially suitable for homes in hard water areas.\u003c\/p\u003e\n\u003chr data-start=\"2257\" data-end=\"2260\"\u003e\n\u003ch2 data-section-id=\"ah7jha\" data-start=\"2262\" data-end=\"2301\"\u003eReliable Central Heating Performance\u003c\/h2\u003e\n\u003cp data-start=\"2303\" data-end=\"2634\"\u003eWith a \u003cstrong data-start=\"2310\" data-end=\"2341\"\u003e21kW central heating output\u003c\/strong\u003e, the Greenstar 21Ri delivers efficient and consistent heating throughout the home. As a \u003cstrong data-start=\"2430\" data-end=\"2460\"\u003eHeat Only (Regular) Boiler\u003c\/strong\u003e, it is designed exclusively for central heating and works alongside a separate hot water cylinder to provide stored domestic hot water. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-start=\"2636\" data-end=\"2763\"\u003eIts advanced condensing technology helps maximise energy efficiency while reducing gas consumption and household heating costs.\u003c\/p\u003e\n\u003chr data-start=\"2765\" data-end=\"2768\"\u003e\n\u003ch2 data-section-id=\"11nmlxs\" data-start=\"2770\" data-end=\"2787\"\u003eCompact Design\u003c\/h2\u003e\n\u003cp data-start=\"2789\" data-end=\"2943\"\u003eDesigned to fit neatly inside a standard kitchen cupboard, the Greenstar 21Ri offers exceptional installation flexibility without sacrificing performance.\u003c\/p\u003e\n\u003ch3 data-section-id=\"bpec4l\" data-start=\"2945\" data-end=\"2959\"\u003eDimensions\u003c\/h3\u003e\n\u003cul data-start=\"2961\" data-end=\"3018\"\u003e\n\u003cli data-section-id=\"1qt4q1n\" data-start=\"2961\" data-end=\"2980\"\u003e\n\u003cstrong data-start=\"2963\" data-end=\"2974\"\u003eHeight:\u003c\/strong\u003e 600mm\u003c\/li\u003e\n\u003cli data-section-id=\"1fl6j5a\" data-start=\"2981\" data-end=\"2999\"\u003e\n\u003cstrong data-start=\"2983\" data-end=\"2993\"\u003eWidth:\u003c\/strong\u003e 390mm\u003c\/li\u003e\n\u003cli data-section-id=\"p1n4lm\" data-start=\"3000\" data-end=\"3018\"\u003e\n\u003cstrong data-start=\"3002\" data-end=\"3012\"\u003eDepth:\u003c\/strong\u003e 270mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3020\" data-end=\"3209\"\u003eThe included \u003cstrong data-start=\"3033\" data-end=\"3052\"\u003ehorizontal flue\u003c\/strong\u003e and \u003cstrong data-start=\"3057\" data-end=\"3079\"\u003e15mm Scale Reducer\u003c\/strong\u003e provide a complete installation package while helping maintain long-term boiler efficiency. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"3211\" data-end=\"3214\"\u003e\n\u003ch2 data-section-id=\"ex875a\" data-start=\"3216\" data-end=\"3245\"\u003eAdvanced Energy Efficiency\u003c\/h2\u003e\n\u003cp data-start=\"3247\" data-end=\"3418\"\u003eRated \u003cstrong data-start=\"3253\" data-end=\"3262\"\u003eErP A\u003c\/strong\u003e with \u003cstrong data-start=\"3268\" data-end=\"3303\"\u003e92% seasonal heating efficiency\u003c\/strong\u003e, the Greenstar 21Ri uses advanced condensing technology to maximise heat output while reducing energy consumption.\u003c\/p\u003e\n\u003cp data-start=\"3420\" data-end=\"3600\"\u003eIts compatibility with renewable technologies such as \u003cstrong data-start=\"3474\" data-end=\"3499\"\u003esolar thermal systems\u003c\/strong\u003e also provides greater flexibility for future heating upgrades. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"3602\" data-end=\"3605\"\u003e\n\u003ch2 data-section-id=\"bvzj9p\" data-start=\"3607\" data-end=\"3645\"\u003eSmart Heating Control Compatibility\u003c\/h2\u003e\n\u003cp data-start=\"3647\" data-end=\"3897\"\u003eThe Greenstar 21Ri is compatible with \u003cstrong data-start=\"3685\" data-end=\"3716\"\u003eWorcester Bosch EasyControl\u003c\/strong\u003e and a range of Worcester heating controls, allowing homeowners to improve comfort, optimise energy usage, and manage heating more efficiently. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"3899\" data-end=\"3902\"\u003e\n\u003ch2 data-section-id=\"19rweb4\" data-start=\"3904\" data-end=\"3946\"\u003eReliable Performance \u0026amp; Easy Maintenance\u003c\/h2\u003e\n\u003cp data-start=\"3948\" data-end=\"4119\"\u003eBuilt with Worcester Bosch's renowned engineering quality, the Greenstar 21Ri features a durable, installer-friendly design with simple controls and easy servicing access.\u003c\/p\u003e\n\u003cp data-start=\"4121\" data-end=\"4290\"\u003eIts compact dimensions and flexible flue positioning make installation straightforward in both new and replacement heating systems. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"4292\" data-end=\"4295\"\u003e\n\u003ch2 data-section-id=\"15okmn6\" data-start=\"4297\" data-end=\"4324\"\u003eWarranty \u0026amp; Peace of Mind\u003c\/h2\u003e\n\u003cp data-start=\"4326\" data-end=\"4646\"\u003eThe \u003cstrong data-start=\"4330\" data-end=\"4407\"\u003eWorcester Bosch 21Ri Heat Only Boiler Including Flue \u0026amp; 15mm Scale Reducer\u003c\/strong\u003e includes \u003cstrong data-start=\"4417\" data-end=\"4460\"\u003eup to a 10-Year manufacturer's warranty\u003c\/strong\u003e when installed with a Worcester Bosch system filter by an accredited installer and registered in accordance with the manufacturer's warranty terms. \u003cspan class=\"\" data-state=\"closed\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003chr data-start=\"4648\" data-end=\"4651\"\u003e\n\u003ch2 data-section-id=\"106hnyp\" data-start=\"4653\" data-end=\"4745\"\u003eWhy Choose the Worcester Bosch 21Ri Heat Only Boiler Including Flue \u0026amp; 15mm Scale Reducer?\u003c\/h2\u003e\n\u003cul data-start=\"4747\" data-end=\"5133\"\u003e\n\u003cli data-section-id=\"xoerhq\" data-start=\"4747\" data-end=\"4800\"\u003eComplete boiler, flue, and scale protection package\u003c\/li\u003e\n\u003cli data-section-id=\"1kq1mn1\" data-start=\"4801\" data-end=\"4838\"\u003eEfficient \u003cstrong data-start=\"4813\" data-end=\"4821\"\u003e21kW\u003c\/strong\u003e heat only boiler\u003c\/li\u003e\n\u003cli data-section-id=\"b4wp0q\" data-start=\"4839\" data-end=\"4867\"\u003e\n\u003cstrong data-start=\"4841\" data-end=\"4856\"\u003eNatural Gas\u003c\/strong\u003e compatible\u003c\/li\u003e\n\u003cli data-section-id=\"11fbbp1\" data-start=\"4868\" data-end=\"4910\"\u003eDesigned for traditional heating systems\u003c\/li\u003e\n\u003cli data-section-id=\"aj1sub\" data-start=\"4911\" data-end=\"4941\"\u003eIncludes \u003cstrong data-start=\"4922\" data-end=\"4941\"\u003eHorizontal Flue\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"1sqr91l\" data-start=\"4942\" data-end=\"4975\"\u003eIncludes \u003cstrong data-start=\"4953\" data-end=\"4975\"\u003e15mm Scale Reducer\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"bg2k3b\" data-start=\"4976\" data-end=\"5005\"\u003eCompact cupboard-fit design\u003c\/li\u003e\n\u003cli data-section-id=\"50y3yf\" data-start=\"5006\" data-end=\"5030\"\u003eEasyControl compatible\u003c\/li\u003e\n\u003cli data-section-id=\"gb5uwd\" data-start=\"5031\" data-end=\"5049\"\u003eSolar compatible\u003c\/li\u003e\n\u003cli data-section-id=\"qsglj3\" data-start=\"5050\" data-end=\"5133\"\u003e\u003cstrong data-start=\"5052\" data-end=\"5093\"\u003eUp to 10-Year manufacturer's warranty\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Mağazam","offers":[{"title":"Default Title","offer_id":49046696722587,"sku":null,"price":1114.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0773\/2091\/3051\/files\/rs-heat-reg_8_1.webp?v=1784641859","url":"https:\/\/boilerlines.co.uk\/products\/worcester-bosch-21ri-heat-only-boiler-including-flue-15mm-scale-reducer","provider":"Boiler Lines","version":"1.0","type":"link"}