{"product_id":"worcester-greenstar-21-ri-erp-regular","title":"Worcester Greenstar 21 Ri ErP+ Regular","description":"\u003ch3\u003eWorcester Greenstar 21 Ri ErP+ Regular Boiler (Natural Gas)\u003c\/h3\u003e\n\nThe \u003cstrong\u003eWorcester Greenstar 21 Ri ErP+ Regular Boiler\u003c\/strong\u003e is a compact, high-efficiency heating solution designed for homes with traditional open-vented heating systems and stored hot water cylinders. As part of Worcester Bosch’s trusted Greenstar range, it combines outstanding performance with sleek, space-saving design — perfect for homeowners who want reliability and energy efficiency in one neat package.\n\n\u003ch3\u003eCompact, Powerful and Space-Saving\u003c\/h3\u003e\n\nThe Greenstar 21 Ri is one of the smallest condensing boilers in the Worcester Bosch lineup, small enough to fit neatly within a standard kitchen cupboard. Despite its compact dimensions — just 590mm high, 390mm wide, and 270mm deep — it delivers a robust \u003cstrong\u003e21 kW heat output\u003c\/strong\u003e, making it ideal for small to medium-sized homes.\n\nIts lightweight build, at just \u003cstrong\u003e27.4 kg\u003c\/strong\u003e, and \u003cstrong\u003emulti-directional fluing options\u003c\/strong\u003e make installation simple and flexible, while flow and return pipes can be plumbed in from either above or below the unit for added convenience.\n\n\u003ch3\u003eEnergy Efficient and Eco-Friendly\u003c\/h3\u003e\n\nWith an \u003cstrong\u003eErP A rating\u003c\/strong\u003e and \u003cstrong\u003eA-rated SAP 2005 seasonal efficiency\u003c\/strong\u003e, the Greenstar 21 Ri ensures excellent fuel economy and reduced energy costs. Designed with the environment in mind, it features \u003cstrong\u003elow NOx and CO? emissions\u003c\/strong\u003e, contributing to cleaner air and lower carbon output.\n\nIt’s also compatible with \u003cstrong\u003eWorcester Greenskies solar panels\u003c\/strong\u003e, allowing households to incorporate renewable energy sources for even greater efficiency and sustainability.\n\n\u003ch3\u003eSimple Controls and Reliable Performance\u003c\/h3\u003e\n\nUser-friendly and practical, this model includes a \u003cstrong\u003efascia-mounted heating temperature control knob\u003c\/strong\u003e and a \u003cstrong\u003eneon operational status indicator\u003c\/strong\u003e, so you can easily monitor your system at a glance. Built to Worcester Bosch’s high standards, the Greenstar 21 Ri promises years of dependable heating with minimal maintenance.\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Greenstar 21 Ri ErP+ Regular\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMPN:\u003c\/strong\u003e 7733600310\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEAN:\u003c\/strong\u003e 4057749719164\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e Heat Only (Regular) Boiler\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFuel Type:\u003c\/strong\u003e Natural Gas\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeat Output:\u003c\/strong\u003e 21 kW\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eErP Rating:\u003c\/strong\u003e A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Wall Mounted\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eColour:\u003c\/strong\u003e White\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 390 mm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 590 mm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eDepth:\u003c\/strong\u003e 270 mm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 27.4 kg\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eGuarantee:\u003c\/strong\u003e 7 Years\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eWhy Choose the Worcester Greenstar 21 Ri?\u003c\/h3\u003e\n\nThe Greenstar 21 Ri offers the perfect balance of performance, flexibility, and simplicity. It’s ideal for homes that need reliable central heating with a separate hot water cylinder. With its compact design, low emissions, and Worcester Bosch’s proven reliability, this boiler is a smart investment for long-term comfort and energy efficiency.\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e \u003ch4\u003eQ1: What type of heating system does the Greenstar 21 Ri work with?\u003c\/h4\u003e The Greenstar 21 Ri is designed for traditional open-vented heating systems that include a cold water tank and a separate hot water cylinder. \u003ch4\u003eQ2: Can this boiler fit inside a kitchen cupboard?\u003c\/h4\u003e Yes. The Greenstar 21 Ri is one of the smallest regular boilers on the market and can be installed neatly within a standard kitchen cabinet, saving valuable space. \u003ch4\u003eQ3: How long is the warranty?\u003c\/h4\u003e This model comes with a \u003cstrong\u003e7-year manufacturer’s guarantee\u003c\/strong\u003e (subject to installation and servicing conditions), offering peace of mind and long-term reliability.\u003cbr\u003e\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/plumbing-supplies\"\u003eplumbing supplies\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/boilers\"\u003eboilers\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Worcester","offers":[{"title":"Default Title","offer_id":51771448623446,"sku":"145795","price":1177.12,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/worcester-greenstar-21-ri-erp-regular-1963067.jpg?v=1772639471","url":"https:\/\/jjbuildingmaterials.co.uk\/products\/worcester-greenstar-21-ri-erp-regular","provider":"JJ Building Materials","version":"1.0","type":"link"}