{"product_id":"navien-28kw-combi-boiler-ncb300","title":"Navien 28kW Combi Boiler NCB300","description":"\u003ch2 data-start=\"62\" data-end=\"136\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"65\" data-end=\"136\"\u003eNavien NCB300 28kW Combi Boiler – Natural Gas \/ LPG (Includes Flue)\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 data-start=\"138\" data-end=\"165\"\u003e\u003c\/h3\u003e\n\u003cp data-start=\"166\" data-end=\"483\"\u003eThe \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eNavien\u003c\/span\u003e\u003c\/span\u003e NCB300 28kW Combi Boiler is a compact yet powerful heating solution designed for smaller to medium-sized homes. As Navien’s entry-level combi, it delivers impressive hot water performance, efficient heating, and flexible installation options—all within a cupboard-fit design.\u003c\/p\u003e\n\u003cp data-start=\"485\" data-end=\"723\"\u003eBuilt with stainless steel heat exchangers, the NCB300 ensures long-term durability and efficiency. Its 6:1 turndown ratio allows the boiler to modulate output effectively, reducing energy consumption while maintaining consistent comfort.\u003c\/p\u003e\n\u003cp data-start=\"725\" data-end=\"955\"\u003eHydrogen-ready (20% blend) and compatible with Navien smart tools, this boiler is designed for both current performance and future energy standards. Supplied \u003cstrong data-start=\"883\" data-end=\"898\"\u003ewith a flue\u003c\/strong\u003e, it offers added value and convenience for installation.\u003c\/p\u003e\n\u003chr data-start=\"957\" data-end=\"960\"\u003e\n\u003ch3 data-start=\"962\" data-end=\"1007\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"966\" data-end=\"1007\"\u003eWhy Customers Should Buy This Product\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1008\" data-end=\"1700\"\u003e\n\u003cli data-start=\"1008\" data-end=\"1059\"\u003e\n\u003cstrong data-start=\"1010\" data-end=\"1025\"\u003e28kW output\u003c\/strong\u003e ideal for small to medium homes\u003c\/li\u003e\n\u003cli data-start=\"1060\" data-end=\"1113\"\u003e\n\u003cstrong data-start=\"1062\" data-end=\"1079\"\u003eIncludes flue\u003c\/strong\u003e for added convenience and value\u003c\/li\u003e\n\u003cli data-start=\"1114\" data-end=\"1183\"\u003e\n\u003cstrong data-start=\"1116\" data-end=\"1151\"\u003eStainless steel heat exchangers\u003c\/strong\u003e for durability and efficiency\u003c\/li\u003e\n\u003cli data-start=\"1184\" data-end=\"1237\"\u003e\n\u003cstrong data-start=\"1186\" data-end=\"1210\"\u003e6:1 modulation ratio\u003c\/strong\u003e for reduced energy usage\u003c\/li\u003e\n\u003cli data-start=\"1238\" data-end=\"1308\"\u003e\n\u003cstrong data-start=\"1240\" data-end=\"1281\"\u003eHigh hot water flow rate (11.5 l\/min)\u003c\/strong\u003e for reliable performance\u003c\/li\u003e\n\u003cli data-start=\"1309\" data-end=\"1370\"\u003e\n\u003cstrong data-start=\"1311\" data-end=\"1342\"\u003eCompact cupboard-fit design\u003c\/strong\u003e for flexible installation\u003c\/li\u003e\n\u003cli data-start=\"1371\" data-end=\"1425\"\u003e\n\u003cstrong data-start=\"1373\" data-end=\"1403\"\u003eHydrogen-ready (20% blend)\u003c\/strong\u003e for future-proofing\u003c\/li\u003e\n\u003cli data-start=\"1426\" data-end=\"1481\"\u003e\n\u003cstrong data-start=\"1428\" data-end=\"1451\"\u003eSmart compatibility\u003c\/strong\u003e with Navien Service Toolkit\u003c\/li\u003e\n\u003cli data-start=\"1482\" data-end=\"1530\"\u003e\n\u003cstrong data-start=\"1484\" data-end=\"1504\"\u003eLightweight unit\u003c\/strong\u003e for easier installation\u003c\/li\u003e\n\u003cli data-start=\"1531\" data-end=\"1575\"\u003e\n\u003cstrong data-start=\"1533\" data-end=\"1552\"\u003eDigital display\u003c\/strong\u003e for simple operation\u003c\/li\u003e\n\u003cli data-start=\"1576\" data-end=\"1632\"\u003e\n\u003cstrong data-start=\"1578\" data-end=\"1612\"\u003e5-year manufacturer’s warranty\u003c\/strong\u003e for peace of mind\u003c\/li\u003e\n\u003cli data-start=\"1633\" data-end=\"1700\"\u003e\n\u003cstrong data-start=\"1635\" data-end=\"1655\"\u003eReliable quality\u003c\/strong\u003e from \u003cspan class=\"hover:entity-accent entity-underline inline cursor-pointer align-baseline\"\u003e\u003cspan class=\"whitespace-normal\"\u003eNavien\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1702\" data-end=\"1705\"\u003e\n\u003ch3 data-start=\"1707\" data-end=\"1733\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1711\" data-end=\"1733\"\u003eKey Specifications\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"1734\" data-end=\"1908\"\u003e\n\u003cli data-start=\"1734\" data-end=\"1755\"\u003e\n\u003cstrong data-start=\"1736\" data-end=\"1746\"\u003eBrand:\u003c\/strong\u003e Navien\u003c\/li\u003e\n\u003cli data-start=\"1756\" data-end=\"1777\"\u003e\n\u003cstrong data-start=\"1758\" data-end=\"1768\"\u003eRange:\u003c\/strong\u003e NCB300\u003c\/li\u003e\n\u003cli data-start=\"1778\" data-end=\"1803\"\u003e\n\u003cstrong data-start=\"1780\" data-end=\"1790\"\u003eModel:\u003c\/strong\u003e 28kW Combi\u003c\/li\u003e\n\u003cli data-start=\"1804\" data-end=\"1838\"\u003e\n\u003cstrong data-start=\"1806\" data-end=\"1823\"\u003eProduct Type:\u003c\/strong\u003e Combi Boiler\u003c\/li\u003e\n\u003cli data-start=\"1839\" data-end=\"1875\"\u003e\n\u003cstrong data-start=\"1841\" data-end=\"1855\"\u003eFuel Type:\u003c\/strong\u003e Natural Gas \/ LPG\u003c\/li\u003e\n\u003cli data-start=\"1876\" data-end=\"1908\"\u003e\n\u003cstrong data-start=\"1878\" data-end=\"1893\"\u003eMount Type:\u003c\/strong\u003e Wall Mounted\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1910\" data-end=\"1928\"\u003e\u003cstrong data-start=\"1910\" data-end=\"1926\"\u003ePerformance:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1929\" data-end=\"2128\"\u003e\n\u003cli data-start=\"1929\" data-end=\"1955\"\u003e\n\u003cstrong data-start=\"1931\" data-end=\"1947\"\u003eHeat Output:\u003c\/strong\u003e 28 kW\u003c\/li\u003e\n\u003cli data-start=\"1956\" data-end=\"1988\"\u003e\n\u003cstrong data-start=\"1958\" data-end=\"1978\"\u003eCH Output (Max):\u003c\/strong\u003e 25.8 kW\u003c\/li\u003e\n\u003cli data-start=\"1989\" data-end=\"2014\"\u003e\n\u003cstrong data-start=\"1991\" data-end=\"2006\"\u003eDHW Output:\u003c\/strong\u003e 28 kW\u003c\/li\u003e\n\u003cli data-start=\"2015\" data-end=\"2060\"\u003e\n\u003cstrong data-start=\"2017\" data-end=\"2047\"\u003eDHW Flow Rate (35°C rise):\u003c\/strong\u003e 11.5 l\/min\u003c\/li\u003e\n\u003cli data-start=\"2061\" data-end=\"2098\"\u003e\n\u003cstrong data-start=\"2063\" data-end=\"2084\"\u003eDHW Output Range:\u003c\/strong\u003e 4.3 – 28 kW\u003c\/li\u003e\n\u003cli data-start=\"2099\" data-end=\"2128\"\u003e\n\u003cstrong data-start=\"2101\" data-end=\"2122\"\u003eModulation Ratio:\u003c\/strong\u003e 6:1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2130\" data-end=\"2157\"\u003e\u003cstrong data-start=\"2130\" data-end=\"2155\"\u003eEfficiency \u0026amp; Ratings:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2158\" data-end=\"2230\"\u003e\n\u003cli data-start=\"2158\" data-end=\"2209\"\u003e\n\u003cstrong data-start=\"2160\" data-end=\"2175\"\u003eERP Rating:\u003c\/strong\u003e A (A+ with Smart Plus controls)\u003c\/li\u003e\n\u003cli data-start=\"2210\" data-end=\"2230\"\u003e\n\u003cstrong data-start=\"2212\" data-end=\"2226\"\u003eNOx Class:\u003c\/strong\u003e 6\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2232\" data-end=\"2249\"\u003e\u003cstrong data-start=\"2232\" data-end=\"2247\"\u003eDimensions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2250\" data-end=\"2316\"\u003e\n\u003cli data-start=\"2250\" data-end=\"2272\"\u003e\n\u003cstrong data-start=\"2252\" data-end=\"2263\"\u003eHeight:\u003c\/strong\u003e 680 mm\u003c\/li\u003e\n\u003cli data-start=\"2273\" data-end=\"2294\"\u003e\n\u003cstrong data-start=\"2275\" data-end=\"2285\"\u003eWidth:\u003c\/strong\u003e 395 mm\u003c\/li\u003e\n\u003cli data-start=\"2295\" data-end=\"2316\"\u003e\n\u003cstrong data-start=\"2297\" data-end=\"2307\"\u003eDepth:\u003c\/strong\u003e 283 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2318\" data-end=\"2337\"\u003e\u003cstrong data-start=\"2318\" data-end=\"2335\"\u003eFlue Options:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2338\" data-end=\"2479\"\u003e\n\u003cli data-start=\"2338\" data-end=\"2372\"\u003e\n\u003cstrong data-start=\"2340\" data-end=\"2365\"\u003eMax Vertical (125mm):\u003c\/strong\u003e 28 m\u003c\/li\u003e\n\u003cli data-start=\"2373\" data-end=\"2406\"\u003e\n\u003cstrong data-start=\"2375\" data-end=\"2400\"\u003eMax Vertical (100mm):\u003c\/strong\u003e 8 m\u003c\/li\u003e\n\u003cli data-start=\"2407\" data-end=\"2443\"\u003e\n\u003cstrong data-start=\"2409\" data-end=\"2436\"\u003eMax Horizontal (125mm):\u003c\/strong\u003e 27 m\u003c\/li\u003e\n\u003cli data-start=\"2444\" data-end=\"2479\"\u003e\n\u003cstrong data-start=\"2446\" data-end=\"2473\"\u003eMax Horizontal (100mm):\u003c\/strong\u003e 8 m\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2481\" data-end=\"2505\"\u003e\u003cstrong data-start=\"2481\" data-end=\"2503\"\u003eDesign \u0026amp; Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2506\" data-end=\"2673\"\u003e\n\u003cli data-start=\"2506\" data-end=\"2541\"\u003eStainless steel heat exchangers\u003c\/li\u003e\n\u003cli data-start=\"2542\" data-end=\"2561\"\u003eDigital display\u003c\/li\u003e\n\u003cli data-start=\"2562\" data-end=\"2593\"\u003eCompact cupboard-fit design\u003c\/li\u003e\n\u003cli data-start=\"2594\" data-end=\"2624\"\u003eHydrogen-ready (20% blend)\u003c\/li\u003e\n\u003cli data-start=\"2625\" data-end=\"2673\"\u003eCompatible with Navien Smart Service Toolkit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2675\" data-end=\"2693\"\u003e\u003cstrong data-start=\"2675\" data-end=\"2691\"\u003eNoise Level:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2694\" data-end=\"2703\"\u003e\n\u003cli data-start=\"2694\" data-end=\"2703\"\u003e52 dB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2705\" data-end=\"2734\"\u003e\u003cstrong data-start=\"2705\" data-end=\"2732\"\u003eAdditional Information:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2735\" data-end=\"2756\"\u003e\n\u003cli data-start=\"2735\" data-end=\"2756\"\u003e\u003cstrong data-start=\"2737\" data-end=\"2754\"\u003eFlue included\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"2758\" data-end=\"2773\"\u003e\u003cstrong data-start=\"2758\" data-end=\"2771\"\u003eWarranty:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"2774\" data-end=\"2814\"\u003e\n\u003cli data-start=\"2774\" data-end=\"2814\"\u003e\u003cstrong data-start=\"2776\" data-end=\"2812\"\u003e5 Years Manufacturer’s Guarantee\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2816\" data-end=\"2819\"\u003e\n\u003ch3 data-start=\"2821\" data-end=\"2846\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2825\" data-end=\"2846\"\u003eWhat’s in the Box\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2847\" data-end=\"2880\"\u003e\n\u003cli data-start=\"2847\" data-end=\"2867\"\u003e1 x Combi Boiler\u003c\/li\u003e\n\u003cli data-start=\"2868\" data-end=\"2880\"\u003eFlue Kit\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2882\" data-end=\"2885\"\u003e\n\u003ch3 data-start=\"2887\" data-end=\"2916\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"2891\" data-end=\"2916\"\u003eImportant Information\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-start=\"2917\" data-end=\"3075\"\u003e\n\u003cli data-start=\"2917\" data-end=\"2972\"\u003eMust be installed by a Gas Safe registered engineer\u003c\/li\u003e\n\u003cli data-start=\"2973\" data-end=\"3046\"\u003eSuitable for sealed systems (no separate hot water cylinder required)\u003c\/li\u003e\n\u003cli data-start=\"3047\" data-end=\"3075\"\u003eControls sold separately\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tradeplumbing","offers":[{"title":"Default Title","offer_id":53347652862290,"sku":"NCB300","price":980.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0904\/3001\/3778\/files\/GPID_1100757783_IMG_00.jpg?v=1778064375","url":"https:\/\/www.tradeplumbing.co.uk\/products\/navien-28kw-combi-boiler-ncb300","provider":"Tradeplumbing","version":"1.0","type":"link"}