{"product_id":"warmflow-agentis-external-combi-oil-boiler","title":"Warmflow Agentis External Combi Oil Boiler – E21C \/ E26C \/ E33C","description":"\u003ch3\u003e\n\u003cmeta charset=\"UTF-8\"\u003e\n\u003cspan\u003eWarmflow Agentis External Combi Oil Boiler – E21C \/ E26C \/ E33C\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eThe \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eWarmflow Agentis External Combi Oil Boiler\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e is a high-efficiency outdoor oil boiler designed to provide both central heating and instantaneous domestic hot water from one compact, weatherproof appliance.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eBuilt specifically for external installation, the Agentis External Combi features Warmflow's \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003epatented stainless steel heat exchanger\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, latest-generation \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eRiello Low NOx burner\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e and a durable \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIP45-rated anthracite grey casing\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"isSelectedEnd\"\u003e\u003cspan\u003eAvailable in \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ethree output options – E21C, E26C and E33C\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e – allowing you to select the most suitable model for your property and hot water requirements.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cspan\u003eChoose Your Model\u003c\/span\u003e\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cspan\u003eModel\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eHeating Output\u003c\/span\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cspan\u003eDHW Flow Rate\u003c\/span\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eE21C\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e15–21kW\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e18 L\/min\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eE26C\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e21–27kW\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e22 L\/min*\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003e\u003cspan\u003eE33C\u003c\/span\u003e\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e27–33kW\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e24 L\/min*\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eExternal oil-fired combination boiler\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eProvides \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003ecentral heating and domestic hot water\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eWarmflow patented \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e5mm stainless steel heat exchanger technology\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eLatest \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eRiello Low NOx burner\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFactory-fitted \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e24-litre hinged expansion vessel\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFactory-fitted \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e32-plate heat exchanger\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFactory-fitted pressure reducing and relief valves\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFactory-fitted \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eGrundfos UPM3 FLEX AS circulating pump\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eDurable \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eIP45 weatherproof casing\u003c\/span\u003e\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAnthracite grey external finish\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eMulti-directional flue arrangement\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003eFlue positions: \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003eleft, right or rear\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e, with optional top arrangement\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eQuiet operation\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003e\u003cspan\u003eHVO Ready\u003c\/span\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eFront and top service access\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDesigned specifically for outdoor installation\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDelivery is 10-14 Working Days\u003c\/strong\u003e\u003c\/p\u003e","brand":"Warmflow","offers":[{"title":"E21C – 15–21kW","offer_id":54635728666961,"sku":null,"price":2999.0,"currency_code":"GBP","in_stock":true},{"title":"E26C – 21–27kW","offer_id":54635728699729,"sku":null,"price":3300.0,"currency_code":"GBP","in_stock":true},{"title":"E33C – 27–33kW","offer_id":54635728732497,"sku":null,"price":3900.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0820\/5022\/0369\/files\/ChatGPTImageAug20_2026_10_00_39AM.png?v=1787216605","url":"https:\/\/www.hydeplumbheatsuppliers.co.uk\/products\/warmflow-agentis-external-combi-oil-boiler","provider":"Hyde Plumbing \u0026 Heating Supplies","version":"1.0","type":"link"}