{"product_id":"ehc-comet-12-16-20-24kw-3-phase-system-electric-boiler-ehc-cs24kw-400v","title":"EHC Comet 12\/16\/20\/24kW 3 Phase System Electric Boiler | EHC.CS24KW | 400V","description":"\u003c!-- SEO Product Name: EHC Comet 12\/16\/20\/24kW 3 Phase System Electric Boiler | EHC.CS24KW | 400V --\u003e\n\u003cdiv style=\"font-size:16px; max-width:900px; margin:0 auto; color:#2B2B2B; line-height:1.6; font-family:Arial, Helvetica, sans-serif;\"\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThe \u003cstrong\u003eEHC Comet 12\/16\/20\/24kW System Electric Boiler\u003c\/strong\u003e (EHC.CS24KW) is the highest-output model in the Comet Standard System range, built on over \u003cstrong\u003e21 years of EHC electric heating expertise\u003c\/strong\u003e. It is intended for larger domestic properties and light-commercial systems where a \u003cstrong\u003e3-phase electrical supply\u003c\/strong\u003e is available, delivering central heating and domestic hot water via an S-Plan configuration from a single wall-mounted unit.\u003c\/p\u003e\n\u003cp style=\"font-size:16px; line-height:1.7; color:#2B2B2B; margin:0 0 16px 0;\"\u003eThis model runs on a \u003cstrong\u003e3-phase 400V supply\u003c\/strong\u003e with \u003cstrong\u003efour selectable output settings — 12kW, 16kW, 20kW or 24kW\u003c\/strong\u003e — configured on-site to match the property’s heat loss and balance load evenly across all three phases. The pump, expansion vessel, automatic air vent, auto-bypass and high-current thermal cut-out are all \u003cstrong\u003efactory-fitted inside the casing\u003c\/strong\u003e, removing the need for external plumbing or pipework.\u003c\/p\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:20px -4px 24px -4px;\"\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-top:3px solid #008377CF; border-radius:6px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; color:#00625D;\"\u003e12–24 kW\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px;\"\u003eSelectable Output\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-top:3px solid #008377CF; border-radius:6px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; color:#00625D;\"\u003e400V 3N~\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px;\"\u003e3-Phase Supply\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-top:3px solid #008377CF; border-radius:6px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; color:#00625D;\"\u003e41 dB\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px;\"\u003eQuiet Operation\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-top:3px solid #008377CF; border-radius:6px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; color:#00625D;\"\u003e20.5 kg\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px;\"\u003eBoiler Weight\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-top:3px solid #008377CF; border-radius:6px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; color:#00625D;\"\u003e20–85°C\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px;\"\u003eFlow Temperature\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 140px; background:#F7FAFA; border:1px solid #D9EDEA; border-top:3px solid #008377CF; border-radius:6px; padding:14px 10px; text-align:center; margin:4px;\"\u003e\n\u003cdiv style=\"font-size:20px; font-weight:700; color:#00625D;\"\u003e5 Years\u003c\/div\u003e\n\u003cdiv style=\"font-size:12.5px; color:#555; margin-top:4px;\"\u003eManufacturer Warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FDECEC; border-left:4px solid #D32F2F; border-radius:4px; padding:14px 16px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#D32F2F; margin-bottom:6px; font-size:14.5px;\"\u003eImportant Safety Information\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThis boiler must be installed by a \u003cstrong\u003equalified electrician\u003c\/strong\u003e in accordance with \u003cstrong\u003eBS 7671\u003c\/strong\u003e Wiring Regulations. A \u003cstrong\u003e30mA RCD\u003c\/strong\u003e, dedicated local isolation and an in-line \u003cstrong\u003emagnetic filter\u003c\/strong\u003e are all mandatory — failure to fit a magnetic filter to this boiler will \u003cstrong\u003einvalidate the manufacturer’s warranty\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#FFF6E5; border-left:4px solid #E0942A; border-radius:4px; padding:14px 16px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#E0942A; margin-bottom:6px; font-size:14.5px;\"\u003ePlease Note\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003eThis model requires a \u003cstrong\u003e3-phase 400V electrical supply\u003c\/strong\u003e — it is not compatible with a standard single-phase domestic supply. Confirm 3-phase availability and carry out a full load check before specifying this boiler. At the 24kW setting, load current reaches \u003cstrong\u003e3 x 34.6A\u003c\/strong\u003e and requires a \u003cstrong\u003e40A MCB\u003c\/strong\u003e per phase.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size:19px; font-weight:700; color:#00625D; margin:32px 0 14px 0; padding-bottom:8px; border-bottom:2px solid #008377CF;\"\u003eKey Features\u003c\/div\u003e\n\u003cdiv style=\"display:flex; flex-wrap:wrap; margin:0 -4px 24px -4px;\"\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#FFFFFF; border:1px solid #D9EDEA; border-radius:6px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15.5px; margin-bottom:6px;\"\u003eFlexible Multi-Output Technology\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eFour selectable outputs (12, 16, 20 or 24kW) let installers range-rate the boiler on site to match the exact heat loss of larger properties.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#FFFFFF; border:1px solid #D9EDEA; border-radius:6px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15.5px; margin-bottom:6px;\"\u003eSix-Stage Modulation\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eA \u003cstrong\u003estainless steel heat exchanger\u003c\/strong\u003e with six-stage heating modulates output in real time, reducing electricity consumption and running costs.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#FFFFFF; border:1px solid #D9EDEA; border-radius:6px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15.5px; margin-bottom:6px;\"\u003eBalanced 3-Phase Loading\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eOutput is spread evenly across all three phases, helping avoid overloading any single phase on larger installations.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#FFFFFF; border:1px solid #D9EDEA; border-radius:6px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15.5px; margin-bottom:6px;\"\u003eVirtually Silent Operation\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eRated at just \u003cstrong\u003e41dB\u003c\/strong\u003e, the Comet Standard operates quietly enough for plant rooms, kitchens and utility spaces.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#FFFFFF; border:1px solid #D9EDEA; border-radius:6px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15.5px; margin-bottom:6px;\"\u003eUnderfloor Heating Compatible\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eAdjustable flow temperature from \u003cstrong\u003e20–85°C\u003c\/strong\u003e makes it equally suited to underfloor heating and traditional radiator systems.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 260px; background:#FFFFFF; border:1px solid #D9EDEA; border-radius:6px; padding:16px; margin:4px;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#00625D; font-size:15.5px; margin-bottom:6px;\"\u003eCompact Wall-Mounted Design\u003c\/div\u003e\n\u003cdiv style=\"font-size:14.5px; color:#444; line-height:1.55;\"\u003eAll core components — pump, expansion vessel, auto-air vent and auto-bypass — are built into a single \u003cstrong\u003e716 x 316 x 235mm\u003c\/strong\u003e casing for a one-person lift and install.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size:19px; font-weight:700; color:#00625D; margin:32px 0 14px 0; padding-bottom:8px; border-bottom:2px solid #008377CF;\"\u003eSpecification\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:18px; border:1px solid #D9EDEA; border-radius:6px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#FFFFFF; font-weight:700; font-size:14.5px; padding:10px 14px;\"\u003ePerformance\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eRated Power Output\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e12 \/ 16 \/ 20 \/ 24 kW\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F1F8F7; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eRated Voltage\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e400V 3N~ (3-phase)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eOutlet Flow Temperature Range\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e20–85°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F1F8F7; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eMaximum Temperature\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e100°C\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eSound Level\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e41 dB\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F1F8F7; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eMinimum System Flow Rate\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e4.5 l\/min\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:18px; border:1px solid #D9EDEA; border-radius:6px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#FFFFFF; font-weight:700; font-size:14.5px; padding:10px 14px;\"\u003eElectrical Data\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eMCB Rating\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e20 \/ 32 \/ 32 \/ 40 A\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F1F8F7; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eLoad Current\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e3x17.4 \/ 3x23.1 \/ 3x28.8 \/ 3x34.6 A\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eMinimum Supply Cable Cross-Section*\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e5x2.5 \/ 5x4 \/ 5x6 mm²\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F1F8F7; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eMaximum Supply Cable Cross-Section\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e5x16 mm²\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eMaximum Allowed Network Impedance\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e0.27 \/ 0.13 Ω\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:18px; border:1px solid #D9EDEA; border-radius:6px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#FFFFFF; font-weight:700; font-size:14.5px; padding:10px 14px;\"\u003eHydraulics \u0026amp; Build\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eBoiler Connections\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003eG 3\/4\" (internal thread)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F1F8F7; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eMaximum System Pressure\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e0.3 MPa (3 bar)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eMinimum System Pressure\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e0.05 MPa (0.5 bar)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F1F8F7; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eBuilt-In Expansion Vessel\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e5 litres, 1.5 bar precharge\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eSafety Class (Ingress Protection)\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003eIP 22\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F1F8F7; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eHeat Exchanger\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003eStainless steel\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"margin-bottom:18px; border:1px solid #D9EDEA; border-radius:6px; overflow:hidden;\"\u003e\n\u003cdiv style=\"background:#008377CF; color:#FFFFFF; font-weight:700; font-size:14.5px; padding:10px 14px;\"\u003eDimensions \u0026amp; Warranty\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eDimensions (H x W x D)\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e716 x 316 x 235 mm\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#F1F8F7; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eWeight\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e~20.5 kg\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display:flex; background:#FFFFFF; padding:9px 14px; border-bottom:1px solid #D9EDEA;\"\u003e\n\u003cdiv style=\"flex:1 1 55%; font-size:14.5px; color:#444;\"\u003eManufacturer Warranty\u003c\/div\u003e\n\u003cdiv style=\"flex:1 1 45%; font-size:14.5px; font-weight:700; color:#222;\"\u003e5 years (registration required, T\u0026amp;Cs apply)\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background:#E6F4F3; border-left:4px solid #008377CF; border-radius:4px; padding:14px 16px; margin:0 0 20px 0;\"\u003e\n\u003cdiv style=\"font-weight:700; color:#008377CF; margin-bottom:6px; font-size:14.5px;\"\u003eGood to Know\u003c\/div\u003e\n\u003cdiv style=\"font-size:15px; color:#2B2B2B; line-height:1.6;\"\u003e*Minimum cable cross-sections are the manufacturer’s stated minimums only, given per phase across a 5-core cable. The cable size for your installation must be calculated separately by a qualified electrician in accordance with \u003cstrong\u003eBS 7671\u003c\/strong\u003e, accounting for cable type, routing and supply voltage deviation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size:19px; font-weight:700; color:#00625D; margin:32px 0 14px 0; padding-bottom:8px; border-bottom:2px solid #008377CF;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:6px; margin-bottom:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#E6F4F3; color:#00625D; font-weight:700; padding:12px 16px; cursor:pointer; font-size:15px; list-style:none;\"\u003eDoes this boiler need a 3-phase supply?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#FFFFFF;\"\u003eYes. The EHC.CS24KW is a \u003cstrong\u003e3-phase 400V\u003c\/strong\u003e model and is not compatible with a standard single-phase domestic supply. If only single-phase power is available, the 2\/4\/6\/8kW or 7.2\/9.6\/12\/14.4kW Comet Standard models are the correct choice instead.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:6px; margin-bottom:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#E6F4F3; color:#00625D; font-weight:700; padding:12px 16px; cursor:pointer; font-size:15px; list-style:none;\"\u003eWhat electrical supply capacity do I need for the 24kW setting?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#FFFFFF;\"\u003eAt the top 24kW output, load current reaches \u003cstrong\u003e3 x 34.6A\u003c\/strong\u003e and requires a \u003cstrong\u003e40A MCB\u003c\/strong\u003e per phase. A full load check of the property’s 3-phase supply by a qualified electrician is essential before installation.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:6px; margin-bottom:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#E6F4F3; color:#00625D; font-weight:700; padding:12px 16px; cursor:pointer; font-size:15px; list-style:none;\"\u003eCan this boiler provide hot water as well as heating?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#FFFFFF;\"\u003eYes. The EHC.CS24KW can be installed for \u003cstrong\u003eheating only\u003c\/strong\u003e, or for combined heating and domestic hot water when wired in an \u003cstrong\u003e‘S’ Plan configuration\u003c\/strong\u003e alongside a compatible hot water cylinder and twin-channel control.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:6px; margin-bottom:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#E6F4F3; color:#00625D; font-weight:700; padding:12px 16px; cursor:pointer; font-size:15px; list-style:none;\"\u003eDo I need to choose one fixed output, or can it be changed later?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#FFFFFF;\"\u003eThe boiler ships with all four output settings available. The installer configures the required output (12, 16, 20 or 24kW) during commissioning via the DIP switches and control panel software — it is not locked to a single kW rating at the factory.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:6px; margin-bottom:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#E6F4F3; color:#00625D; font-weight:700; padding:12px 16px; cursor:pointer; font-size:15px; list-style:none;\"\u003eIs a magnetic filter really mandatory?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#FFFFFF;\"\u003eYes. A magnetic filter must be fitted to the return of this boiler. This is a \u003cstrong\u003emanufacturer warranty condition\u003c\/strong\u003e, not just best practice — installing without one will void the warranty regardless of any other fault.\u003c\/div\u003e\u003c\/details\u003e\u003cdetails style=\"border:1px solid #D9EDEA; border-radius:6px; margin-bottom:8px; overflow:hidden;\"\u003e\u003csummary style=\"background:#E6F4F3; color:#00625D; font-weight:700; padding:12px 16px; cursor:pointer; font-size:15px; list-style:none;\"\u003eIs this boiler suitable for larger commercial-style installations?\u003c\/summary\u003e\u003cdiv style=\"padding:12px 16px; font-size:14.5px; color:#333; line-height:1.6; background:#FFFFFF;\"\u003eThe 3-phase design and up to 24kW output make it suitable for larger domestic properties and light-commercial systems. For higher demand still, EHC also offers dedicated 3-phase commercial boiler ranges and cascade-linked multi-boiler setups.\u003c\/div\u003e\u003c\/details\u003e\n\u003c\/div\u003e","brand":"EHC","offers":[{"title":"Default Title","offer_id":65934533263709,"sku":"EHC.CS24KW","price":1720.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/EHCCometElectricSystemBoiler.jpg?v=1789537046","url":"https:\/\/qualityheating.co.uk\/products\/ehc-comet-12-16-20-24kw-3-phase-system-electric-boiler-ehc-cs24kw-400v","provider":"AIZO Quality Heating","version":"1.0","type":"link"}