{"product_id":"worcester-bosch-greenstar-4000-system-boiler","title":"Worcester Bosch Greenstar 4000 System Boiler 12–24kW","description":"\u003cdiv class=\"availability-notice\" style=\"border:2px solid #e68a2e;border-radius:6px;padding:12px 16px;margin:0 0 16px;background:#fff7ef;\"\u003e\u003cp\u003e\u003cstrong\u003e18kW in stock in Lincoln (3 units, ready now); other outputs are supplied to order.\u003c\/strong\u003e Order-in boilers are usually with us in 2-4 working days. We confirm availability and the delivery or collection date when you order.\u003c\/p\u003e\u003c\/div\u003e\u003ch2\u003eWorcester Bosch Greenstar 4000 System Boiler 12–24kW\u003c\/h2\u003e\u003cp\u003eThe Greenstar 4000 system boiler heats the radiators directly and supplies a separate hot water cylinder, with the pump and expansion vessel built in. Natural gas, 12kW to 24kW. The 18kW is new, boxed stock in our Lincoln warehouse; other outputs are supplied to order.\u003c\/p\u003e\u003ch3\u003eKey points\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e12, 15, 18, 21 and 24kW, natural gas\u003c\/li\u003e\n\u003cli\u003e724 x 400 x 310mm (H x W x D)\u003c\/li\u003e\n\u003cli\u003eQuiet Mark certified; colour display\u003c\/li\u003e\n\u003cli\u003eErP A\u003c\/li\u003e\n\u003cli\u003eEasyControl compatible; add the internal diverter valve kit for a cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"required-notice\" style=\"border:2px solid #1f6feb;border-radius:6px;padding:12px 16px;margin:16px 0;\"\u003e\n\u003cp\u003e\u003cstrong\u003eRequired with this boiler: a flue kit\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWorcester Bosch supplies this boiler without a flue. The \u003cstrong\u003eFlue kit\u003c\/strong\u003e selector above Add to cart adds the \u003ca href=\"\/products\/worcester-bosch-greenstar-60-100-telescopic-horizontal-flue-kit\"\u003eGreenstar 60\/100 standard telescopic horizontal flue kit (350-570mm, 7716191082)\u003c\/a\u003e by default, as a separate line in your basket. Pick the long kit (570-790mm) for thicker walls, or the \u003ca href=\"\/products\/worcester-bosch-greenstar-60-100-vertical-flue-kit-7719002430\"\u003e60\/100 vertical flue kit\u003c\/a\u003e for a roof exit.\u003c\/p\u003e\n\u003cp\u003eOnly choose \u003cstrong\u003e\"I already have this\"\u003c\/strong\u003e if you already have a compatible Worcester Greenstar flue kit for this boiler. Check maximum flue lengths and terminal positions in the installation manual.\u003c\/p\u003e\n\u003c\/div\u003e\u003ch3\u003eWhat's included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e1 x Worcester Bosch Greenstar 4000 system boiler in the output you select, boiler only, as supplied by the manufacturer\u003c\/li\u003e\n\u003cli\u003eWall-mounting jig, as supplied by Worcester Bosch\u003c\/li\u003e\n\u003cli\u003eNo flue included: choose your flue kit with the selector above Add to cart\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecification and price\u003c\/h3\u003e\u003cp\u003eDimensions (H x W x D): 724 x 400 x 310mm. ErP A.\u003c\/p\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eOutput\u003c\/th\u003e\n\u003cth\u003eFuel\u003c\/th\u003e\n\u003cth\u003ePart number\u003c\/th\u003e\n\u003cth\u003eOur code\u003c\/th\u003e\n\u003cth\u003ePrice (inc VAT)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12kW\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003ctd\u003e7733600377\u003c\/td\u003e\n\u003ctd\u003ePLUMHEAT0397\u003c\/td\u003e\n\u003ctd\u003e£1,269.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e15kW\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003ctd\u003e7733600379\u003c\/td\u003e\n\u003ctd\u003ePLUMHEAT0399\u003c\/td\u003e\n\u003ctd\u003e£1,339.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e18kW\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003ctd\u003e7733600381\u003c\/td\u003e\n\u003ctd\u003ePLUMHEAT0401\u003c\/td\u003e\n\u003ctd\u003e£630.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e21kW\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003ctd\u003e7733600383\u003c\/td\u003e\n\u003ctd\u003ePLUMHEAT0403\u003c\/td\u003e\n\u003ctd\u003e£1,519.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e24kW\u003c\/td\u003e\n\u003ctd\u003eNatural Gas\u003c\/td\u003e\n\u003ctd\u003e7733600385\u003c\/td\u003e\n\u003ctd\u003ePLUMHEAT0404\u003c\/td\u003e\n\u003ctd\u003e£1,579.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eRecommended add-ons\u003c\/h3\u003e\u003cp\u003eTick these in the add-on list above Add to cart, or follow the links:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/worcester-bosch-greenstar-magnetic-system-filter\"\u003eWorcester Bosch Greenstar magnetic system filter\u003c\/a\u003e: protects the heat exchanger and is part of Worcester's extended guarantee terms.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/worcester-bosch-easycontrol-ct200-smart-thermostat-white-7736701341\"\u003eWorcester Bosch EasyControl CT200 smart thermostat\u003c\/a\u003e: app, voice and presence-based control.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/worcester-greenstar-4000-system-diverter-valve-kit-7733601251\"\u003eWorcester Bosch Greenstar 4000 system diverter valve kit\u003c\/a\u003e: internal diverter for a hot water cylinder.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/worcester-bosch-greenstar-vertical-pre-piping-kit\"\u003eWorcester Bosch Greenstar vertical pre-piping kit\u003c\/a\u003e: pre-formed vertical pipework behind the boiler (choose the 4000 \/ Compact version).\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/worcester-bosch-greenstar-60-100-90-degree-flue-bend-7716191084\"\u003eWorcester Bosch 60\/100 90° flue bend\u003c\/a\u003e: for side exits and changes of direction.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/worcester-bosch-45-degree-flue-bends-pair\"\u003eWorcester Bosch 45° flue bends (pair)\u003c\/a\u003e: offsets around obstacles.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cdiv class=\"compliance-notice\" style=\"border:2px solid #1f6feb;border-radius:6px;padding:12px 16px;margin:16px 0;\"\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation and guarantee\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eInstallation must be by a Gas Safe registered engineer (oil: OFTEC registered) and commissioned with the Benchmark checklist. Manufacturer guarantees require registration after installation and annual servicing; extended guarantee terms are the manufacturer's and may require their approved filter\/installer.\u003c\/p\u003e\n\u003cp\u003eWorcester Bosch's current UK product page quotes \u003cstrong\u003eup to a 10 year guarantee\u003c\/strong\u003e when installed by a Worcester Bosch Accredited Installer (Worcester's terms apply).\u003c\/p\u003e\n\u003c\/div\u003e\u003ch3\u003eDelivery and collection\u003c\/h3\u003e\u003cp\u003eDelivered by pallet\/courier (£29.99 per order) or collect free from Leafbridge, Lincoln. Order-in boilers usually 2-4 working days.\u003c\/p\u003e\u003cp\u003eWorcester Bosch's Greenstar 4000 System 18kW ErP data sheet, Greenstar 4000 System 12kW ErP data sheet, Greenstar 4000 System 21kW ErP data sheet are in the PDF downloads at the bottom of this page.\u003c\/p\u003e\u003cdiv class=\"shop-the-range\"\u003e\n\u003ch3\u003eShop the Worcester Bosch Greenstar range\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-1000-combi-boiler\"\u003eWorcester Bosch Greenstar 1000 combi\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-2000-combi-boiler\"\u003eWorcester Bosch Greenstar 2000 combi\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-4000-combi-boiler\"\u003eWorcester Bosch Greenstar 4000 combi\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-cdi-compact-combi-boiler\"\u003eWorcester Bosch Greenstar CDi Compact combi\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-8000-plus-combi-boiler\"\u003eWorcester Bosch Greenstar 8000+ combi\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-8000-plus-style-combi-boiler\"\u003eWorcester Bosch Greenstar 8000+ Style combi\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-i-system-compact-boiler\"\u003eWorcester Bosch Greenstar i System Compact\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-8000-plus-system-boiler\"\u003eWorcester Bosch Greenstar 8000+ system\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-ri-regular-boiler\"\u003eWorcester Bosch Greenstar Ri regular\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-8000-plus-regular-boiler\"\u003eWorcester Bosch Greenstar 8000+ regular\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/worcester-bosch-greenstar-8000-life-30kw-regular-boiler-ex-stock-clearance\"\u003eGreenstar 8000 Life 30kW regular, ex-stock clearance\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eFlues and accessories: \u003ca href=\"\/products\/worcester-bosch-greenstar-60-100-telescopic-horizontal-flue-kit\"\u003e60\/100 telescopic flue kit\u003c\/a\u003e · \u003ca href=\"\/products\/worcester-bosch-greenstar-60-100-vertical-flue-kit-7719002430\"\u003evertical flue kit\u003c\/a\u003e · \u003ca href=\"\/products\/worcester-bosch-greenstar-60-100-90-degree-flue-bend-7716191084\"\u003e90° bend\u003c\/a\u003e · \u003ca href=\"\/products\/worcester-bosch-45-degree-flue-bends-pair\"\u003e45° bends\u003c\/a\u003e · \u003ca href=\"\/products\/worcester-bosch-greenstar-magnetic-system-filter\"\u003eGreenstar system filter\u003c\/a\u003e · \u003ca href=\"\/products\/worcester-bosch-easycontrol-ct200-smart-thermostat-white-7736701341\"\u003eEasyControl CT200\u003c\/a\u003e. Browse all \u003ca href=\"\/collections\/boilers\"\u003eboilers\u003c\/a\u003e and \u003ca href=\"\/collections\/central-heating-controls\"\u003ecentral heating controls\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003ePair it with an \u003ca href=\"\/collections\/unvented-hot-water-cylinders\"\u003eunvented hot water cylinder\u003c\/a\u003e and an \u003ca href=\"\/collections\/expansion-vessels\"\u003eexpansion vessel\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Worcester Bosch","offers":[{"title":"12kW","offer_id":60156237316480,"sku":"PLUMHEAT0397","price":1269.99,"currency_code":"GBP","in_stock":true},{"title":"15kW","offer_id":60156237349248,"sku":"PLUMHEAT0399","price":1339.99,"currency_code":"GBP","in_stock":true},{"title":"18kW","offer_id":60151308288384,"sku":"PLUMHEAT0401","price":630.99,"currency_code":"GBP","in_stock":true},{"title":"21kW","offer_id":60156237382016,"sku":"PLUMHEAT0403","price":1519.99,"currency_code":"GBP","in_stock":true},{"title":"24kW","offer_id":60156237414784,"sku":"PLUMHEAT0404","price":1579.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0723\/6344\/2467\/files\/worcester-greenstar-4000-system-front-1600.webp?v=1792403216","url":"https:\/\/shop.the-glow-group.co.uk\/products\/worcester-bosch-greenstar-4000-system-boiler","provider":"The Glow Group","version":"1.0","type":"link"}