{"product_id":"worcester-greenstar-9-ri-erp-regular","title":"Worcester Greenstar 9 Ri ErP+ Regular","description":"\u003ch3\u003eWorcester Greenstar 9 Ri ErP+ Regular Boiler (Natural Gas)\u003c\/h3\u003e\n\nThe \u003cstrong\u003eWorcester Greenstar 9 Ri ErP+ Regular Boiler\u003c\/strong\u003e is a compact yet powerful gas-fired condensing boiler, designed for homes with a traditional open-vented heating system and separate hot water cylinder. Delivering exceptional efficiency and quiet operation, it’s the ideal choice for small properties looking for reliable heating performance without compromising on energy savings.\n\n\u003ch3\u003eEnergy-Efficient and Eco-Friendly\u003c\/h3\u003e\n\nWith an impressive \u003cstrong\u003eErP A energy efficiency rating\u003c\/strong\u003e and a seasonal space heating efficiency of \u003cstrong\u003e92%\u003c\/strong\u003e, the Greenstar 9 Ri ensures optimal performance while keeping running costs low. This condensing boiler achieves up to \u003cstrong\u003e98.1% efficiency\u003c\/strong\u003e at low temperatures, helping homeowners reduce energy consumption and carbon emissions. Its low \u003cstrong\u003eNOx output of just 32 mg\/kWh\u003c\/strong\u003e also makes it an environmentally responsible choice.\n\n\u003ch3\u003eQuiet and Compact Design\u003c\/h3\u003e\n\nOperating at just \u003cstrong\u003e45 dB\u003c\/strong\u003e, the Greenstar 9 Ri runs exceptionally quietly — perfect for installation in kitchens, airing cupboards, or utility rooms. Its compact size and lightweight design make it easy to fit in a range of internal spaces, while the clean, modern styling complements any home.\n\n\u003ch3\u003eReliable Worcester Bosch Quality\u003c\/h3\u003e\n\nBuilt by \u003cstrong\u003eWorcester Bosch\u003c\/strong\u003e, the Greenstar 9 Ri reflects the brand’s reputation for outstanding reliability and engineering excellence. Designed for longevity and ease of maintenance, it’s an excellent option for households upgrading an older regular boiler or modernising their heating system.\n\n\u003ch3\u003eKey Technical Specifications\u003c\/h3\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Greenstar 9 Ri ErP+ Regular\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eProduct Code:\u003c\/strong\u003e 7733600306\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eRated Heat Output:\u003c\/strong\u003e 9 kW\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eEnergy Efficiency Class:\u003c\/strong\u003e A\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSeasonal Space Heating Efficiency:\u003c\/strong\u003e 92%\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eUseful Efficiency at 30% Load:\u003c\/strong\u003e 98.1%\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSound Power Level:\u003c\/strong\u003e 45 dB\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eCondensing Boiler:\u003c\/strong\u003e Yes\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eNOx Emissions:\u003c\/strong\u003e 32 mg\/kWh\u003c\/li\u003e \u003c\/ul\u003e \u003ch3\u003eWhy Choose the Worcester Greenstar 9 Ri?\u003c\/h3\u003e\n\nThis model is ideal for smaller homes or flats with lower heating demands, particularly where space is limited but reliability and efficiency are essential. When paired with a hot water cylinder, the Greenstar 9 Ri delivers consistent, dependable hot water and heating performance throughout the year.\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e \u003ch4\u003eQ1: What type of system is the Worcester Greenstar 9 Ri suitable for?\u003c\/h4\u003e The 9 Ri is a \u003cstrong\u003eregular (heat-only) boiler\u003c\/strong\u003e, designed for homes that already have a hot water cylinder and a cold water storage tank in the loft. It’s ideal for traditional open-vented systems. \u003ch4\u003eQ2: How efficient is the Greenstar 9 Ri?\u003c\/h4\u003e It boasts a \u003cstrong\u003e92% seasonal efficiency\u003c\/strong\u003e and can reach up to \u003cstrong\u003e98.1% efficiency\u003c\/strong\u003e under low-temperature operation, meaning it’s highly efficient and environmentally friendly. \u003ch4\u003eQ3: Is the Greenstar 9 Ri noisy when running?\u003c\/h4\u003e Not at all. The boiler operates at a quiet \u003cstrong\u003e45 dB\u003c\/strong\u003e, making it one of the quieter models in the Worcester Bosch range — perfect for indoor installation without disturbance.\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":51771448590678,"sku":"145791","price":936.09,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/worcester-greenstar-9-ri-erp-regular-5711735.jpg?v=1772639470","url":"https:\/\/jjbuildingmaterials.co.uk\/products\/worcester-greenstar-9-ri-erp-regular","provider":"JJ Building Materials","version":"1.0","type":"link"}