{"product_id":"worcester-bosch-greenstar-heatslave-ii-external-18-25-oil-combi-boiler-7731600264","title":"Worcester Greenstar Heatslave II External 18\/25 2022+ Combi Boiler","description":"\u003cp class=\"PDq2pG_selectionAnchorContainer\"\u003e\u003cstrong\u003eWorcester Greenstar Heatslave II External 18\/25 2022+ Combi Boiler\u003c\/strong\u003e\u003cbr\u003e\u003cbr\u003eThe \u003cstrong\u003eWorcester Bosch Greenstar Heatslave II External 18\/25\u003c\/strong\u003e is a high-performance oil combi boiler designed for outdoor installation. Providing central heating and instant hot water from a single appliance, it is an excellent choice for small to medium-sized properties located off the mains gas network.\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eWith a maximum central heating output of \u003cstrong\u003e25kW\u003c\/strong\u003e and a domestic hot-water flow rate of up to \u003cstrong\u003e18 litres per minute\u003c\/strong\u003e, this boiler delivers dependable heating and strong hot-water performance without requiring a separate cylinder.\u003c\/p\u003e\n\u003cp\u003eIts durable, weather-resistant external cabinet frees up valuable space inside the property. Integrated frost protection supports reliable operation during cold weather, while the cross-firing burner and one-piece primary baffle provide convenient access for servicing and maintenance.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eMaximum \u003cstrong\u003e25kW central heating output\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHot-water flow rate of up to \u003cstrong\u003e18 L\/min\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eProvides heating and instant domestic hot water\u003c\/li\u003e\n\u003cli\u003eExternal installation saves valuable indoor space\u003c\/li\u003e\n\u003cli\u003eDurable, weather-resistant green cabinet\u003c\/li\u003e\n\u003cli\u003eIntegrated frost protection\u003c\/li\u003e\n\u003cli\u003eQuiet operation\u003c\/li\u003e\n\u003cli\u003eDigital control interface for accurate operation\u003c\/li\u003e\n\u003cli\u003eCross-firing burner design\u003c\/li\u003e\n\u003cli\u003eOne-piece primary baffle for easier servicing\u003c\/li\u003e\n\u003cli\u003eConvenient front access to internal components\u003c\/li\u003e\n\u003cli\u003eEasy-access oil and hydraulic connections\u003c\/li\u003e\n\u003cli\u003eCompatible with selected Worcester Bosch controls\u003c\/li\u003e\n\u003cli\u003eSolar-compatible\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eErP A-rated for central heating\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eErP B-rated for water heating\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003eUp to \u003cstrong\u003e7-year Worcester Bosch guarantee\u003c\/strong\u003e, subject to eligibility and manufacturer terms\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Specification\u003c\/h2\u003e\n\u003cdiv class=\"group TyagGW_tableContainer\"\u003e\n\u003cdiv class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\"\u003e\n\u003ctable class=\"w-fit min-w-(--thread-content-width)\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth class=\"last:pe-10\"\u003eSpecification\u003c\/th\u003e\n\u003cth class=\"last:pe-10\"\u003eDetails\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eWorcester Bosch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRange\u003c\/td\u003e\n\u003ctd\u003eGreenstar Heatslave II External\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e18\/25 2022+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer Part Number\u003c\/td\u003e\n\u003ctd\u003e7731600264\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEAN\u003c\/td\u003e\n\u003ctd\u003e4062321624545\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBoiler Type\u003c\/td\u003e\n\u003ctd\u003eCombi boiler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel Type\u003c\/td\u003e\n\u003ctd\u003eOil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation Type\u003c\/td\u003e\n\u003ctd\u003eExternal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting\u003c\/td\u003e\n\u003ctd\u003eFloor standing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum Central Heating Output\u003c\/td\u003e\n\u003ctd\u003e25kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDomestic Hot-Water Flow Rate\u003c\/td\u003e\n\u003ctd\u003e18 L\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating ErP Rating\u003c\/td\u003e\n\u003ctd\u003eA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHot-Water ErP Rating\u003c\/td\u003e\n\u003ctd\u003eB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e950mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e640mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth\u003c\/td\u003e\n\u003ctd\u003e770mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCabinet Colour\u003c\/td\u003e\n\u003ctd\u003eGreen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMagnetic Filter Included\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuarantee\u003c\/td\u003e\n\u003ctd\u003eUp to 7 years, subject to terms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eWhy Choose the Heatslave II External 18\/25?\u003c\/h2\u003e\n\u003cp\u003eThe external design makes this boiler particularly suitable for properties where indoor installation space is limited. Its 25kW output provides a balanced combination of heating capacity and hot-water performance, while Worcester Bosch’s service-friendly design helps simplify routine maintenance.\u003c\/p\u003e\n\u003ch2\u003eImportant Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eInstallation must be completed by a suitably qualified \u003cstrong\u003eOFTEC-registered heating engineer\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eA magnetic system filter is not included.\u003c\/li\u003e\n\u003cli\u003eThe appropriate flue, controls and installation accessories should be purchased separately unless expressly stated otherwise.\u003c\/li\u003e\n\u003cli\u003eWorcester Bosch’s extended guarantee is subject to installation, registration and eligibility requirements.\u003c\/li\u003e\n\u003cli\u003eBoiler suitability should be confirmed by a qualified heating professional before purchase.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eDelivery is 6-11 Days\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Worcester Bosch","offers":[{"title":"Default Title","offer_id":54605458604369,"sku":"7731600264","price":3999.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5022\/0369\/files\/10802301_FO_a64377f7-0d22-4aff-bec8-731a431fccb4.jpg?v=1787003449","url":"https:\/\/www.hydeplumbheatsuppliers.co.uk\/products\/worcester-bosch-greenstar-heatslave-ii-external-18-25-oil-combi-boiler-7731600264","provider":"Hyde Plumbing \u0026 Heating Supplies","version":"1.0","type":"link"}