{"title":"NAVIEN","description":"","products":[{"product_id":"navien-ncb700-on-54kw-combi-boiler","title":"Navien NCB700 ON 54kW Combi Boiler","description":"\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; font-family:Arial, Helvetica, sans-serif; color:#222;\"\u003e\n\u003cdiv style=\"line-height:1.65;color:#222;margin-bottom:20px;\"\u003eThe \u003cstrong\u003eNavien NCB700-3S\/54K\u003c\/strong\u003e is a wall-hung, room-sealed gas condensing \u003cstrong\u003eCombi Crossover boiler\u003c\/strong\u003e rated at 54kW — the first product of its kind capable of delivering hot water to \u003cstrong\u003ethree bathrooms simultaneously\u003c\/strong\u003e. Navien's \u003cstrong\u003eON technology\u003c\/strong\u003e maximises recirculation of domestic hot water to combine the consistent flow of a system boiler with the space-saving convenience of a combi, eliminating the slow heat-up times and flow-rate drop-off of a conventional combi at this scale.\u003c\/div\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 26px;\"\u003e\n\u003cdiv style=\"flex:1;min-width:110px;background:#008377CF;color:#fff;border-radius:8px;padding:14px 10px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:19px;font-weight:800;line-height:1.15;\"\u003e54kW\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:.92;margin-top:4px;\"\u003eDHW Output\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;min-width:110px;background:#008377CF;color:#fff;border-radius:8px;padding:14px 10px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:19px;font-weight:800;line-height:1.15;\"\u003e94%\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:.92;margin-top:4px;\"\u003eErP Efficiency (A)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;min-width:110px;background:#008377CF;color:#fff;border-radius:8px;padding:14px 10px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:19px;font-weight:800;line-height:1.15;\"\u003e25.8 l\/min\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:.92;margin-top:4px;\"\u003eDHW Flow (ΔT30°C)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;min-width:110px;background:#008377CF;color:#fff;border-radius:8px;padding:14px 10px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:19px;font-weight:800;line-height:1.15;\"\u003e15:1\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:.92;margin-top:4px;\"\u003eTurndown Ratio\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;min-width:110px;background:#008377CF;color:#fff;border-radius:8px;padding:14px 10px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:19px;font-weight:800;line-height:1.15;\"\u003e12 yrs\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:.92;margin-top:4px;\"\u003eParts \u0026amp; Labour Warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1;min-width:110px;background:#008377CF;color:#fff;border-radius:8px;padding:14px 10px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:19px;font-weight:800;line-height:1.15;\"\u003e46kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;opacity:.92;margin-top:4px;\"\u003eLift Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fdecea;border-left:5px solid #c0392b;border-radius:0 8px 8px 0;padding:14px 18px;margin:16px 0;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#8a1f13;font-size:14px;margin-bottom:5px;\"\u003eGas Safe Registration Required\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#333;line-height:1.6;\"\u003eInstallation, commissioning and servicing of this boiler must be carried out by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e. A Benchmark commissioning checklist must be completed and left with the end user, and the flue must be positioned in accordance with the clearances set out in the manufacturer's installation and operation manual.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#fff8e6;border-left:5px solid #b8860b;border-radius:0 8px 8px 0;padding:14px 18px;margin:16px 0;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#7a5900;font-size:14px;margin-bottom:5px;\"\u003eLPG Conversion \u0026amp; Sizing\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#333;line-height:1.6;\"\u003eThe boiler is shipped ready to fire on natural gas, with an \u003cstrong\u003eLPG conversion kit included\u003c\/strong\u003e in the packaging for field conversion by a suitably qualified Gas Safe engineer. At 54kW DHW output, this is a large-property boiler — confirm mains water flow rate and pressure are sufficient to make full use of its 25.8 l\/min hot water delivery before ordering.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size:18px;font-weight:700;color:#00594F;border-bottom:3px solid #008377CF;padding-bottom:8px;margin:30px 0 14px;\"\u003eWhy This Boiler\u003c\/div\u003e\n\u003cdiv style=\"display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0 26px;\"\u003e\n\u003cdiv style=\"background:#e6f4f2;border-left:4px solid #008377CF;border-radius:0 6px 6px 0;padding:14px 16px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#00594F;font-size:14.5px;margin-bottom:6px;\"\u003eNavien ON Recirculation Technology\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#333;line-height:1.6;\"\u003eBuilt-in \u003cstrong\u003eDHW recirculation\u003c\/strong\u003e keeps hot water primed at outlets around the property, removing the wait and the fluctuation between hot and cold that affects conventional combi boilers under heavy simultaneous demand.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#e6f4f2;border-left:4px solid #008377CF;border-radius:0 6px 6px 0;padding:14px 16px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#00594F;font-size:14.5px;margin-bottom:6px;\"\u003eThree Showers Simultaneously\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#333;line-height:1.6;\"\u003eRated to deliver hot water to \u003cstrong\u003ethree bathrooms at once\u003c\/strong\u003e, the NCB700 ON removes the need to choose between a combi's compact footprint and a system boiler's simultaneous hot water capacity.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#e6f4f2;border-left:4px solid #008377CF;border-radius:0 6px 6px 0;padding:14px 16px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#00594F;font-size:14.5px;margin-bottom:6px;\"\u003eIndustry-Leading 15:1 Turndown\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#333;line-height:1.6;\"\u003eA \u003cstrong\u003e15:1 modulation ratio\u003c\/strong\u003e allows the burner to idle at a very low minimum output, improving part-load efficiency and comfort across a huge range of demand.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#e6f4f2;border-left:4px solid #008377CF;border-radius:0 6px 6px 0;padding:14px 16px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#00594F;font-size:14.5px;margin-bottom:6px;\"\u003eNaviCirc™ Hot Water Return\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#333;line-height:1.6;\"\u003e\n\u003cstrong\u003eNaviCirc™\u003c\/strong\u003e simplifies the setup of a hot water return system, supporting fast, consistent delivery to outlets throughout a larger home.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#e6f4f2;border-left:4px solid #008377CF;border-radius:0 6px 6px 0;padding:14px 16px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#00594F;font-size:14.5px;margin-bottom:6px;\"\u003eHydrogen-Ready (20% Blend)\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#333;line-height:1.6;\"\u003eTested and approved for use with up to a \u003cstrong\u003e20% hydrogen blend\u003c\/strong\u003e in the gas supply, helping future-proof the installation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#e6f4f2;border-left:4px solid #008377CF;border-radius:0 6px 6px 0;padding:14px 16px;\"\u003e\n\u003cdiv style=\"font-weight:700;color:#00594F;font-size:14.5px;margin-bottom:6px;\"\u003e12-Year Warranty\u003c\/div\u003e\n\u003cdiv style=\"font-size:14px;color:#333;line-height:1.6;\"\u003eNavien back the NCB700 ON with a \u003cstrong\u003e12-year parts and labour warranty\u003c\/strong\u003e as standard — the longest in the current Navien gas range.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size:18px;font-weight:700;color:#00594F;border-bottom:3px solid #008377CF;padding-bottom:8px;margin:30px 0 14px;\"\u003eTechnical Specification\u003c\/div\u003e\n\u003cdiv style=\"overflow-x:auto;margin:18px 0 26px;\"\u003e\u003ctable style=\"width:100%;border-collapse:collapse;\"\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF;color:#fff;font-weight:700;padding:9px 14px;font-size:13px;letter-spacing:.04em;text-transform:uppercase;\"\u003eGeneral\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eArticle number\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003ePNCB7000054L001 (NCB700-3S\/54K)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eBoiler type\u003c\/td\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003eWall-hung, room-sealed, fan-assisted condensing Combi Crossover\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eFuel type\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003eNatural gas (LPG conversion kit included, field conversion required)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eDimensions (W x D x H)\u003c\/td\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e440 x 353 x 695 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eGuarantee\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e12 years parts and labour\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eShower rating\u003c\/td\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003eThree showers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF;color:#fff;font-weight:700;padding:9px 14px;font-size:13px;letter-spacing:.04em;text-transform:uppercase;\"\u003eHeating Performance\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eHeat input range\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e3.5 – 35.0 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eHeat output range (80\/60°C)\u003c\/td\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e3.4 – 34.0 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eModulation (max\/min)\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e15:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF;color:#fff;font-weight:700;padding:9px 14px;font-size:13px;letter-spacing:.04em;text-transform:uppercase;\"\u003eDomestic Hot Water\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eDHW heat input range\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e3.5 – 52.4 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eDHW output range\u003c\/td\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e3.5 – 54.0 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eDHW flow rate (ΔT = 25°C)\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e31.0 l\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eDHW flow rate (ΔT = 30°C)\u003c\/td\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e25.8 l\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eDHW flow rate, kitchen tap (ΔT = 45°C)\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e17.2 l\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF;color:#fff;font-weight:700;padding:9px 14px;font-size:13px;letter-spacing:.04em;text-transform:uppercase;\"\u003ePerformance \u0026amp; Emissions\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eErP efficiency\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003eA (94%) — A+ (98%) with single Smart Plus control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eNOx classification\u003c\/td\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003eClass 6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eLift weight\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e46 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd colspan=\"2\" style=\"background:#008377CF;color:#fff;font-weight:700;padding:9px 14px;font-size:13px;letter-spacing:.04em;text-transform:uppercase;\"\u003eFlue\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eFlue diameter\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003eCoaxial 60\/100mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eMax. horizontal coaxial flue length\u003c\/td\u003e\n\u003ctd style=\"background:#ffffff;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e20 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;font-weight:600;color:#333;font-size:14px;width:44%;border-bottom:1px solid #e2e2e2;\"\u003eMax. vertical coaxial flue length\u003c\/td\u003e\n\u003ctd style=\"background:#f2faf9;padding:9px 14px;color:#222;font-size:14px;border-bottom:1px solid #e2e2e2;\"\u003e21 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003c\/div\u003e\n\u003cdiv style=\"font-size:18px;font-weight:700;color:#00594F;border-bottom:3px solid #008377CF;padding-bottom:8px;margin:30px 0 14px;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdiv style=\"margin:18px 0 10px;\"\u003e\n\u003cdetails style=\"border:1px solid #cde3e1;border-radius:8px;margin-bottom:10px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:12px 18px;font-weight:700;font-size:14.5px;cursor:pointer;list-style:none;\"\u003eWhat does ON technology actually do?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px;font-size:14px;color:#333;line-height:1.65;background:#fff;\"\u003eIt maximises recirculation of domestic hot water around the property's pipework, so hot water is already primed at outlets rather than needing to travel the full length of pipe from the boiler on every draw-off — reducing water wastage and the wait for hot water.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #cde3e1;border-radius:8px;margin-bottom:10px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:12px 18px;font-weight:700;font-size:14.5px;cursor:pointer;list-style:none;\"\u003eCan this boiler really supply three bathrooms at once?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px;font-size:14px;color:#333;line-height:1.65;background:#fff;\"\u003eYes — Navien designed the NCB700 ON specifically to deliver hot water to three bathrooms simultaneously without the flow or temperature drop-off typical of smaller combi boilers under similar demand.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #cde3e1;border-radius:8px;margin-bottom:10px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:12px 18px;font-weight:700;font-size:14.5px;cursor:pointer;list-style:none;\"\u003eDo I still need a hot water cylinder with this boiler?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px;font-size:14px;color:#333;line-height:1.65;background:#fff;\"\u003eNo. As a Combi Crossover model, the NCB700 ON supplies domestic hot water directly, without needing a separate storage cylinder, despite its system-boiler-level performance.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #cde3e1;border-radius:8px;margin-bottom:10px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:12px 18px;font-weight:700;font-size:14.5px;cursor:pointer;list-style:none;\"\u003eCan I run this boiler on LPG?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px;font-size:14px;color:#333;line-height:1.65;background:#fff;\"\u003eAn LPG conversion kit is included in the boiler's packaging as standard, but the boiler ships configured for natural gas. Conversion must be carried out by a Gas Safe registered engineer holding the appropriate LPG qualification.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #cde3e1;border-radius:8px;margin-bottom:10px;overflow:hidden;\"\u003e\u003csummary style=\"background:#008377CF;color:#fff;padding:12px 18px;font-weight:700;font-size:14.5px;cursor:pointer;list-style:none;\"\u003eCan I install this boiler myself?\u003c\/summary\u003e\u003cdiv style=\"padding:14px 18px;font-size:14px;color:#333;line-height:1.65;background:#fff;\"\u003eNo. UK law requires that all gas boiler installation, commissioning and servicing work is carried out by a Gas Safe registered engineer.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Navien","offers":[{"title":"Default Title","offer_id":65142551118173,"sku":"PNCB7000054L001","price":1995.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/NavienCombiBoilerSide.jpg?v=1783090844"},{"product_id":"navien-pem750-r290-monobloc-air-source-heat-pump-4-6-8-10-17kw-variant","title":"Navien PEM750 R290 Monobloc Air Source Heat Pump — 4\/6\/8\/10\/17kW Variant","description":"\u003cdiv style=\"font-size: 16px; font-family: Arial,Helvetica,sans-serif; color: #222; max-width: 900px; margin: 0 auto; line-height: 1.55;\"\u003e\n\u003cp style=\"margin: 0 0 14px 0;\"\u003eThe \u003cstrong\u003eNavien PEM750\u003c\/strong\u003e is Navien's flagship \u003cstrong\u003eR290 propane monobloc air source heat pump\u003c\/strong\u003e for UK residential properties. Available in \u003cstrong\u003efive capacities from 4 kW to 17 kW\u003c\/strong\u003e — select the size that matches your calculated heat loss on the variant selector. Every variant shares the same platform: R290 refrigerant (GWP 3), \u003cstrong\u003eflow temperatures up to 75°C\u003c\/strong\u003e, reliable operation down to -20°C ambient, MCS\/Keymark certified, BUS grant eligible, and backed by Navien's UK warranty of up to \u003cstrong\u003eseven years parts and labour\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0;\"\u003e\n\u003cdiv style=\"flex: 1 1 140px; min-width: 120px; background: #008377CF; color: #fff; padding: 14px 10px; text-align: center; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; line-height: 1.1;\"\u003e4–17 kW\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.95; letter-spacing: 0.3px; text-transform: uppercase;\"\u003eOutput range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 140px; min-width: 120px; background: #008377CF; color: #fff; padding: 14px 10px; text-align: center; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; line-height: 1.1;\"\u003eR290\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.95; letter-spacing: 0.3px; text-transform: uppercase;\"\u003eRefrigerant (GWP 3)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 140px; min-width: 120px; background: #008377CF; color: #fff; padding: 14px 10px; text-align: center; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; line-height: 1.1;\"\u003eUp to 75°C\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.95; letter-spacing: 0.3px; text-transform: uppercase;\"\u003eMax flow temp\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 140px; min-width: 120px; background: #008377CF; color: #fff; padding: 14px 10px; text-align: center; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; line-height: 1.1;\"\u003eSCOP 4.87\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.95; letter-spacing: 0.3px; text-transform: uppercase;\"\u003ePeak efficiency\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 140px; min-width: 120px; background: #008377CF; color: #fff; padding: 14px 10px; text-align: center; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; line-height: 1.1;\"\u003e-20°C\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.95; letter-spacing: 0.3px; text-transform: uppercase;\"\u003eMin ambient\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 140px; min-width: 120px; background: #008377CF; color: #fff; padding: 14px 10px; text-align: center; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold; line-height: 1.1;\"\u003e7 years\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.95; letter-spacing: 0.3px; text-transform: uppercase;\"\u003eWarranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #E6F3F1; border-left: 4px solid #008377; padding: 14px 16px; margin: 16px 0; border-radius: 0 4px 4px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; margin-bottom: 4px;\"\u003eBUS grant eligible\u003c\/div\u003e\n\u003cdiv\u003eThe Navien PEM750 is eligible for the UK \u003cstrong\u003eBoiler Upgrade Scheme grant\u003c\/strong\u003e when installed by an MCS-certified installer in an eligible property. The grant is paid directly to your installer and discounted from your quote.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #FFF6E0; border-left: 4px solid #C89200; padding: 14px 16px; margin: 16px 0; border-radius: 0 4px 4px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #c89200; margin-bottom: 4px;\"\u003eR290 outdoor unit siting\u003c\/div\u003e\n\u003cdiv\u003eR290 is an A3 flammable refrigerant. UK installation requires minimum clearances from doors, windows, drains and ignition sources per Navien's technical manual. Most domestic gardens accommodate the unit easily — constrained sites need design review before ordering.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #FBEAE9; border-left: 4px solid #B3261E; padding: 14px 16px; margin: 16px 0; border-radius: 0 4px 4px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #b3261e; margin-bottom: 4px;\"\u003eMCS-certified installer required\u003c\/div\u003e\n\u003cdiv\u003eTo claim the BUS grant and validate the full Navien manufacturer warranty (up to 7 years parts and labour), this heat pump must be installed and commissioned by an \u003cstrong\u003eMCS-certified heat pump installer\u003c\/strong\u003e. Quality Heating can connect you with our trade network.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #008377; font-size: 18px; margin: 24px 0 10px 0; padding-bottom: 6px; border-bottom: 2px solid #008377CF;\"\u003eChoose your capacity\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%; font-size: 14.5px; margin: 8px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"background: rgba(0, 131, 119, 0.81); color: rgb(255, 255, 255); padding: 9px 12px; border: 1px solid rgb(0, 131, 119); text-align: left; font-weight: bold; width: 17.3524%;\"\u003eHeating output\u003c\/th\u003e\n\u003cth style=\"background: rgba(0, 131, 119, 0.81); color: rgb(255, 255, 255); padding: 9px 12px; border: 1px solid rgb(0, 131, 119); text-align: left; font-weight: bold; width: 53.4884%;\"\u003eTypical property fit\u003c\/th\u003e\n\u003cth style=\"background: rgba(0, 131, 119, 0.81); color: rgb(255, 255, 255); padding: 9px 12px; border: 1px solid rgb(0, 131, 119); text-align: left; font-weight: bold; width: 29.1592%;\"\u003eNavien part number\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 17.3524%;\"\u003e4 kW\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 53.4884%;\"\u003eSmall, well-insulated 1–2 bedroom homes and flats\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 29.1592%;\"\u003eGPEM750004VGP01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #FFFFFF;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 17.3524%;\"\u003e6 kW\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 53.4884%;\"\u003eTypical 2–3 bedroom UK homes with average insulation\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 29.1592%;\"\u003eGPEM750006VGP01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 17.3524%;\"\u003e8 kW\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 53.4884%;\"\u003e3–4 bedroom semis and detached homes\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 29.1592%;\"\u003eGPEM750008VGP01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #FFFFFF;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 17.3524%;\"\u003e10 kW\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 53.4884%;\"\u003eLarger 4–5 bedroom detached properties\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 29.1592%;\"\u003eGPEM750010VGP01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 17.3524%;\"\u003e17 kW\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 53.4884%;\"\u003eVery large detached homes, older properties with retrofitted insulation, or small commercial\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid rgb(229, 231, 235); width: 29.1592%;\"\u003eGPEM750017VGP01\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #E6F3F1; border-left: 4px solid #008377; padding: 14px 16px; margin: 16px 0; border-radius: 0 4px 4px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; margin-bottom: 4px;\"\u003eSizing tip\u003c\/div\u003e\n\u003cdiv\u003eAlways size a heat pump from a \u003cstrong\u003ecalculated room-by-room heat loss survey\u003c\/strong\u003e — not from bedroom count or existing boiler size. Oversized heat pumps short-cycle and lose efficiency; undersized units rely too heavily on backup heat. Quality Heating offers free heat loss calculations on request.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #008377; font-size: 18px; margin: 24px 0 10px 0; padding-bottom: 6px; border-bottom: 2px solid #008377CF;\"\u003eWhy choose the Navien PEM750\u003c\/h3\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0;\"\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 240px; background: #fff; border: 1px solid #E5E7EB; border-top: 3px solid #008377CF; padding: 14px 16px; border-radius: 4px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; margin-bottom: 6px;\"\u003eR290 refrigerant — GWP 3\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14.5px;\"\u003ePropane refrigerant with a GWP of just 3 — close to \u003cstrong\u003eone-thousand times lower\u003c\/strong\u003e than legacy split heat pump refrigerants. The most future-proof choice ahead of tightening UK F-Gas regulation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 240px; background: #fff; border: 1px solid #E5E7EB; border-top: 3px solid #008377CF; padding: 14px 16px; border-radius: 4px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; margin-bottom: 6px;\"\u003eFlow temperatures up to 75°C\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14.5px;\"\u003eDelivers \u003cstrong\u003e75°C flow temperatures\u003c\/strong\u003e — exceptional for radiator-only retrofits where existing emitters need to stay in place, and ideal for high-temperature DHW production.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 240px; background: #fff; border: 1px solid #E5E7EB; border-top: 3px solid #008377CF; padding: 14px 16px; border-radius: 4px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; margin-bottom: 6px;\"\u003eReliable cold-weather output\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14.5px;\"\u003eRated operation down to \u003cstrong\u003e-20°C ambient\u003c\/strong\u003e — dependable heat delivery through UK winter cold snaps, no supplementary heat required in typical conditions.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 240px; background: #fff; border: 1px solid #E5E7EB; border-top: 3px solid #008377CF; padding: 14px 16px; border-radius: 4px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; margin-bottom: 6px;\"\u003eSCOP up to 4.87 — A+++ ERP\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14.5px;\"\u003eTop-tier seasonal efficiency for meaningful annual running-cost savings versus older split systems and, in most retrofit cases, versus running a gas boiler at current tariffs.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 240px; background: #fff; border: 1px solid #E5E7EB; border-top: 3px solid #008377CF; padding: 14px 16px; border-radius: 4px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; margin-bottom: 6px;\"\u003eSealed monobloc — no on-site F-Gas\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14.5px;\"\u003eRefrigerant circuit fully sealed at the factory. The installer only connects \u003cstrong\u003ewater pipes\u003c\/strong\u003e indoors — no F-Gas brazing required at install, reducing complexity and cost.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 240px; background: #fff; border: 1px solid #E5E7EB; border-top: 3px solid #008377CF; padding: 14px 16px; border-radius: 4px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; margin-bottom: 6px;\"\u003eSmart touch display + app + web\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14.5px;\"\u003eOnboard smart touch display for setup, and dedicated \u003cstrong\u003esmartphone app plus web platform\u003c\/strong\u003e for remote monitoring, scheduling, and fault alerts.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 240px; background: #fff; border: 1px solid #E5E7EB; border-top: 3px solid #008377CF; padding: 14px 16px; border-radius: 4px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; margin-bottom: 6px;\"\u003eShock absorption technology\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14.5px;\"\u003eEnhanced stability through shock absorption in the outdoor unit — reduces transmitted vibration and helps sustain performance across the warranty period.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; min-width: 240px; background: #fff; border: 1px solid #E5E7EB; border-top: 3px solid #008377CF; padding: 14px 16px; border-radius: 4px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377; margin-bottom: 6px;\"\u003eUp to 7-year warranty\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14.5px;\"\u003eBacked by Navien UK's manufacturer warranty of \u003cstrong\u003eup to seven years, parts and labour included\u003c\/strong\u003e — one of the strongest warranty offers on the UK heat pump market.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #008377; font-size: 18px; margin: 24px 0 10px 0; padding-bottom: 6px; border-bottom: 2px solid #008377CF;\"\u003ePlatform specification (all variants)\u003c\/h3\u003e\n\u003cdiv style=\"overflow-x: auto;\"\u003e\n\u003ctable style=\"border-collapse: collapse; width: 100%; font-size: 14.5px; margin: 8px 0;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eRange\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eNavien PEM750\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #FFFFFF;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eType\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eR290 monobloc air source heat pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eAvailable capacities\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003e4 kW \/ 6 kW \/ 8 kW \/ 10 kW \/ 17 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #FFFFFF;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eRefrigerant\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eR290 propane (GWP 3)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eMaximum flow temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003e75°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #FFFFFF;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eMinimum operating ambient\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003e-20°C (rated); reliable operation in UK winter conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003ePeak SCOP\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eUp to 4.87 (35°C low-temperature output)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #FFFFFF;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eERP energy label\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eA+++\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eElectrical supply\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003e220–240V, 50Hz, single-phase (all variants)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #FFFFFF;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eCertifications\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eMCS certified, Keymark, BUS Grant eligible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eOutdoor unit finish\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eGrey\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #FFFFFF;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eArchitecture\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eSealed monobloc — no on-site refrigerant brazing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eCompatible with\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eRadiators, underfloor heating, DHW cylinders\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #FFFFFF;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eSmart control\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eOnboard smart touch display + smartphone app + web platform\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #F7FAFA;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB; font-weight: 600; width: 42%;\"\u003eWarranty\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border: 1px solid #E5E7EB;\"\u003eUp to 7 years parts and labour (Navien UK, MCS install)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003ch3 style=\"color: #008377; font-size: 18px; margin: 24px 0 10px 0; padding-bottom: 6px; border-bottom: 2px solid #008377CF;\"\u003eWhat's in the box (every variant)\u003c\/h3\u003e\n\u003cul style=\"padding-left: 22px; margin: 8px 0;\"\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eNavien PEM750 outdoor monobloc unit (capacity per selected variant)\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eRefrigerant circuit and integrated controls\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eManufacturer installation and commissioning documentation\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eNavien UK warranty registration card\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #008377; font-size: 18px; margin: 24px 0 10px 0; padding-bottom: 6px; border-bottom: 2px solid #008377CF;\"\u003eWhat you'll also need (sold separately)\u003c\/h3\u003e\n\u003cul style=\"padding-left: 22px; margin: 8px 0;\"\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eDHW cylinder (heat-pump-suitable, indirect coil sized for low flow temperature)\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eIndoor hydraulic kit \/ wiring centre (Navien's dedicated wiring centre simplifies commissioning)\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eOutdoor wall bracket or floor stand\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eAnti-freeze valves on primary flow and return\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eMagnetic system filter on the primary return\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eBuffer tank if system water volume falls below Navien's minimum\u003c\/li\u003e\n\u003cli style=\"margin-bottom: 5px;\"\u003eCondensate drainage — piped to soakaway or gulley recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 style=\"color: #008377; font-size: 18px; margin: 24px 0 10px 0; padding-bottom: 6px; border-bottom: 2px solid #008377CF;\"\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdetails style=\"border: 1px solid #E5E7EB; border-radius: 4px; margin: 8px 0; overflow: hidden;\"\u003e\n\u003csummary style=\"cursor: pointer; background: #008377CF; color: #fff; padding: 10px 14px; font-weight: 600; list-style: none;\"\u003eWhich kW should I choose?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; background: #FFFFFF;\"\u003eChoose the variant that matches your \u003cstrong\u003ecalculated heat loss\u003c\/strong\u003e. As a rough guide: 4 kW for small well-insulated 1–2 bed homes; 6 kW for typical 2–3 bed homes; 8 kW for 3–4 bed semis and detached; 10 kW for larger 4–5 bed detached; 17 kW for very large or lightly-insulated properties. \u003cstrong\u003eAlways confirm with a proper heat loss survey\u003c\/strong\u003e — sizing by rule of thumb is the most common cause of poor heat pump performance.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #E5E7EB; border-radius: 4px; margin: 8px 0; overflow: hidden;\"\u003e\n\u003csummary style=\"cursor: pointer; background: #008377CF; color: #fff; padding: 10px 14px; font-weight: 600; list-style: none;\"\u003eIs R290 safe for a domestic installation?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; background: #FFFFFF;\"\u003eYes. R290 is widely used across Europe in domestic heat pumps and refrigeration. The refrigerant is \u003cstrong\u003esealed inside the outdoor unit\u003c\/strong\u003e, which sits outside the property. UK installation rules govern minimum siting clearances to ensure safety; a competent designer will ensure these are met.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #E5E7EB; border-radius: 4px; margin: 8px 0; overflow: hidden;\"\u003e\n\u003csummary style=\"cursor: pointer; background: #008377CF; color: #fff; padding: 10px 14px; font-weight: 600; list-style: none;\"\u003eWill my existing radiators work with the PEM750?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; background: #FFFFFF;\"\u003eIn most retrofit cases, yes — the PEM750's \u003cstrong\u003e75°C flow temperature\u003c\/strong\u003e means existing radiators sized for a gas boiler will usually deliver enough output without uprating. A heat loss survey identifies any coldest-rooms exceptions.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #E5E7EB; border-radius: 4px; margin: 8px 0; overflow: hidden;\"\u003e\n\u003csummary style=\"cursor: pointer; background: #008377CF; color: #fff; padding: 10px 14px; font-weight: 600; list-style: none;\"\u003eDo I need to be MCS-registered to install this?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; background: #FFFFFF;\"\u003eThe unit can be installed by any competent heating engineer, but to claim the \u003cstrong\u003eBoiler Upgrade Scheme grant\u003c\/strong\u003e and to activate the full 7-year Navien warranty, the install must be carried out by an MCS-certified installer. Quality Heating can introduce you to trade partners if needed.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #E5E7EB; border-radius: 4px; margin: 8px 0; overflow: hidden;\"\u003e\n\u003csummary style=\"cursor: pointer; background: #008377CF; color: #fff; padding: 10px 14px; font-weight: 600; list-style: none;\"\u003eHow loud is the outdoor unit?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; background: #FFFFFF;\"\u003eNavien quote a low-noise floor of \u003cstrong\u003e42 dB(A)\u003c\/strong\u003e, quieter than a typical gas-powered boiler. Sound power figures rise with capacity (larger units are inherently louder), but every variant is designed to meet MCS 020 boundary noise limits on a normal domestic install.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"border: 1px solid #E5E7EB; border-radius: 4px; margin: 8px 0; overflow: hidden;\"\u003e\n\u003csummary style=\"cursor: pointer; background: #008377CF; color: #fff; padding: 10px 14px; font-weight: 600; list-style: none;\"\u003eIs there a smart control included?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 16px; background: #FFFFFF;\"\u003eYes — every PEM750 includes a \u003cstrong\u003esmart touch display\u003c\/strong\u003e onboard, plus a dedicated smartphone app and web platform for schedules, monitoring and fault alerts. No extra Wi-Fi module needed.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Navien","offers":[{"title":"4kW","offer_id":65259554341213,"sku":"GPEM750004VGP01","price":3470.0,"currency_code":"GBP","in_stock":true},{"title":"6kW","offer_id":65259554373981,"sku":"GPEM750006VGP01","price":3700.0,"currency_code":"GBP","in_stock":true},{"title":"8kW","offer_id":65259554406749,"sku":"GPEM750008VGP01","price":3995.0,"currency_code":"GBP","in_stock":true},{"title":"10kW","offer_id":65259554439517,"sku":"GPEM750010VGP01","price":4650.0,"currency_code":"GBP","in_stock":true},{"title":"17kW","offer_id":65259554472285,"sku":"GPEM750017VGP01","price":5995.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/NavienBlackHeatPump.jpg?v=1784109130"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/collections\/NAVIEN.webp?v=1784113730","url":"https:\/\/qualityheating.co.uk\/collections\/navien.oembed","provider":"AIZO Quality Heating","version":"1.0","type":"link"}