{"product_id":"ariston-e-combi-one-24kw-and-30kw-condensing-combi-gas-boiler-boiler-only-no-flue","title":"Ariston E-Combi ONE 24kW and 30kW Condensing Combi Gas Boiler – Boiler Only No Flue","description":"\u003c!-- SEO Product Name: Ariston E-Combi ONE 24kW and 30kW Condensing Combi Gas Boiler – Boiler Only No Flue --\u003e\n\u003cdiv style=\"font-size:16px;font-family:Arial,sans-serif;color:#222;max-width:900px;margin:0 auto;line-height:1.6;\"\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eAriston E-Combi ONE Condensing Combi Gas Boiler\u003c\/strong\u003e is available in \u003cstrong\u003e24 kW (Part No. 3301131)\u003c\/strong\u003e and \u003cstrong\u003e30 kW (Part No. 3301132)\u003c\/strong\u003e outputs, supplied here as \u003cstrong\u003eboiler only — no flue kit included\u003c\/strong\u003e. This option is intended for \u003cstrong\u003ereplacement installations\u003c\/strong\u003e where the existing flue system is in serviceable condition and will be reused, or for \u003cstrong\u003enew builds where the flue is supplied and specified separately\u003c\/strong\u003e by the main contractor. Both models share Ariston's \u003cstrong\u003epatented XtraTech™ stainless steel heat exchanger\u003c\/strong\u003e, \u003cstrong\u003e94% seasonal efficiency\u003c\/strong\u003e, \u003cstrong\u003eA\/A ErP energy rating\u003c\/strong\u003e, and \u003cstrong\u003e1:7 modulation ratio\u003c\/strong\u003e. \u003cstrong\u003eLPG conversion kits and wall brackets are included as standard\u003c\/strong\u003e in both boxes. The E-Combi ONE range is compatible with Ariston's full HE Ø60\/100 and Ø80\/125 coaxial flue accessory range and with Ariston NET smart controls.\u003c\/p\u003e\n\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:10px;margin:22px 0;\"\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;border-radius:8px;padding:14px 18px;flex:1 1 130px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:22px;font-weight:700;\"\u003e94%\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003eSeasonal Efficiency\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;border-radius:8px;padding:14px 18px;flex:1 1 130px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:22px;font-weight:700;\"\u003eA \/ A\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003eErP Heating \/ DHW\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;border-radius:8px;padding:14px 18px;flex:1 1 130px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:22px;font-weight:700;\"\u003e1:7\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003eModulation Ratio\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;border-radius:8px;padding:14px 18px;flex:1 1 130px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:22px;font-weight:700;\"\u003eNo Flue\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003eBoiler Only\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;border-radius:8px;padding:14px 18px;flex:1 1 130px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:22px;font-weight:700;\"\u003eLPG Kit\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003eIncluded as Standard\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;border-radius:8px;padding:14px 18px;flex:1 1 130px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:22px;font-weight:700;\"\u003e29.3 \/ 31.9 kg\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003eWeight 24 kW \/ 30 kW\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background:#fdecea;border-left:4px solid #c0392b;padding:14px 16px;border-radius:6px;margin:18px 0;\"\u003e\n  \u003cstrong\u003e⚠ Gas Safe Registered Installer Required:\u003c\/strong\u003e This boiler must be installed and commissioned by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e in accordance with the Gas Safety (Installation and Use) Regulations 1998 and current Building Regulations. A compliant flue must be fitted — this listing does not include one.\n\u003c\/div\u003e\n\n\u003cdiv style=\"background:#fdecea;border-left:4px solid #c0392b;padding:14px 16px;border-radius:6px;margin:18px 0;\"\u003e\n  \u003cstrong\u003e⚠ Flue Not Included — Must Be Ordered Separately:\u003c\/strong\u003e This boiler cannot operate without a correctly specified flue system. The E-Combi ONE uses the \u003cstrong\u003eAriston HE Ø60\/100 coaxial flue range\u003c\/strong\u003e. Standard options:\n  \u003cul style=\"margin:8px 0 0 0;padding-left:20px;\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHorizontal through-wall:\u003c\/strong\u003e 3318073 Horizontal Coaxial Kit (1000mm)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHorizontal + vertical option for installer:\u003c\/strong\u003e 3318074 Horizontal Kit + Vertical Starter bundle\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVertical domestic (125mm terminal):\u003c\/strong\u003e 3318079 Starter + 3318080 (black) or 3318081 (red) flue kit\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVertical leisure\/caravan (100mm terminal):\u003c\/strong\u003e 3318079 Starter + 3319235 flue kit\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"background:#e6f4f3;border-left:4px solid #008377;padding:14px 16px;border-radius:6px;margin:18px 0;\"\u003e\n  \u003cstrong\u003eℹ What's in the Box — Both Models:\u003c\/strong\u003e LPG conversion kit, wall mounting bracket, tap kit (filling loop), installation manual, and Benchmark commissioning checklist. No flue components are included.\n\u003c\/div\u003e\n\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:24px 0;\"\u003e\n\n  \u003cdiv style=\"border:1px solid #ddd;border-radius:8px;padding:16px;\"\u003e\n    \u003cdiv style=\"font-size:16px;font-weight:700;border-bottom:2px solid #008377;padding-bottom:6px;margin-bottom:10px;\"\u003eXtraTech™ Stainless Steel Heat Exchanger\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eAriston's \u003cstrong\u003epatented single-coil XtraTech™ stainless steel heat exchanger\u003c\/strong\u003e uses \u003cstrong\u003ewider waterways\u003c\/strong\u003e than conventional copper alternatives to resist limescale build-up and improve thermal transfer over the boiler's service life. Performance independently certified by \u003cstrong\u003eTÜV Rheinland\u003c\/strong\u003e.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"border:1px solid #ddd;border-radius:8px;padding:16px;\"\u003e\n    \u003cdiv style=\"font-size:16px;font-weight:700;border-bottom:2px solid #008377;padding-bottom:6px;margin-bottom:10px;\"\u003eAUTO Function — Intelligent Efficiency\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eThe \u003cstrong\u003eAUTO function\u003c\/strong\u003e continuously analyses system thermal behaviour and automatically adjusts boiler output and pump speed to match real demand — reducing short-cycling and preventing energy waste during mild weather, without requiring the householder to intervene.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"border:1px solid #ddd;border-radius:8px;padding:16px;\"\u003e\n    \u003cdiv style=\"font-size:16px;font-weight:700;border-bottom:2px solid #008377;padding-bottom:6px;margin-bottom:10px;\"\u003e1:7 Modulation — Low Minimum Output\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eA \u003cstrong\u003e1:7 modulation ratio\u003c\/strong\u003e lets the boiler throttle back to approximately 3.1 kW (24 kW) or 4.3 kW (30 kW) minimum output. This avoids the short-cycling and associated heat exchanger stress that fixed-output boilers produce in well-insulated smaller properties.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"border:1px solid #ddd;border-radius:8px;padding:16px;\"\u003e\n    \u003cdiv style=\"font-size:16px;font-weight:700;border-bottom:2px solid #008377;padding-bottom:6px;margin-bottom:10px;\"\u003eAriston NET Compatible\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eAlthough neither model includes built-in Wi-Fi, both are \u003cstrong\u003eAriston NET compatible\u003c\/strong\u003e. Adding the \u003cstrong\u003eCube S Net wired thermostat (3319126)\u003c\/strong\u003e or the \u003cstrong\u003eCube RF wireless controller\u003c\/strong\u003e enables full remote control and scheduling via the Ariston NET app without any hardware changes to the boiler.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"border:1px solid #ddd;border-radius:8px;padding:16px;\"\u003e\n    \u003cdiv style=\"font-size:16px;font-weight:700;border-bottom:2px solid #008378;padding-bottom:6px;margin-bottom:10px;\"\u003eCompact \u0026amp; Lightweight — Easy Retrofit\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eThe 24 kW weighs just \u003cstrong\u003e29.3 kg at 315 mm deep\u003c\/strong\u003e; the 30 kW \u003cstrong\u003e31.9 kg at 385 mm deep\u003c\/strong\u003e. \u003cstrong\u003ePipework connections align with previous Ariston models\u003c\/strong\u003e, minimising re-routing time on like-for-like replacements where the existing flue is being retained.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"border:1px solid #ddd;border-radius:8px;padding:16px;\"\u003e\n    \u003cdiv style=\"font-size:16px;font-weight:700;border-bottom:2px solid #008377;padding-bottom:6px;margin-bottom:10px;\"\u003eLPG Ready Out of the Box\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eAn \u003cstrong\u003eLPG conversion kit is included as standard\u003c\/strong\u003e in both models. The Gas Safe engineer converts to propane (G31) at commissioning with no additional parts. This makes both models equally suitable for off-grid and rural properties on bottled or bulk LPG.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003cdiv style=\"overflow-x:auto;margin:24px 0;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;font-size:15px;\"\u003e\n  \u003ctr style=\"background:#008377CF;color:#fff;\"\u003e\n    \u003cth style=\"padding:10px 12px;text-align:left;\"\u003eParameter\u003c\/th\u003e\n    \u003cth style=\"padding:10px 12px;text-align:center;\"\u003eE-Combi ONE 24 kW\u003c\/th\u003e\n    \u003cth style=\"padding:10px 12px;text-align:center;\"\u003eE-Combi ONE 30 kW\u003c\/th\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e3301131\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e3301132\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eErP Rating\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003eA \/ A (Heating \/ DHW)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eSeasonal Space Heating Efficiency\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e94%\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eSAP 2009\/2012 Efficiency\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e89.4%\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eCH Heat Output (Max)\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e22 kW\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e28 kW\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eDHW Heat Output (Max)\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e26 kW\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e30 kW\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eDHW Flow Rate ΔT 35°C\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e10.4 l\/min\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e12.5 l\/min\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eCH Temperature Range (High)\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e35 – 82°C\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eCH Temperature Range (Low \/ UFH)\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e20 – 45°C\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eDHW Temperature Range\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e36 – 60°C\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eModulation Ratio\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e1:7\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eDHW Pressure Min \/ Max\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e0.2 \/ 7.0 bar\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eBuilt-in Expansion Vessel\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e8 litres\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eNoise Level\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e49 dB \/ Band XL\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e51 dB \/ Band XL\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eNOx Emissions\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e53 mg\/kWh\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e51 mg\/kWh\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e29.3 kg\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e31.9 kg\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eDimensions H × W × D\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e745 × 400 × 315 mm\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\"\u003e745 × 400 × 385 mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eServicing Clearances T \/ F \/ Bo\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e300 \/ 450 \/ 250 mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eServicing Clearances L \/ R\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e5 \/ 5 mm\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eElectrical Supply\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003e230 V \/ 50 Hz\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eIP Rating\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003eIPX5D\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;\"\u003e\u003cstrong\u003eGas Types\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;border-bottom:1px solid #e0e0e0;text-align:center;\" colspan=\"2\"\u003eNatural gas G20 and LPG propane G31 (conversion kit included)\u003c\/td\u003e\n  \u003c\/tr\u003e\n  \u003ctr style=\"background:#f9f9f9;\"\u003e\n    \u003ctd style=\"padding:8px 12px;\"\u003e\u003cstrong\u003eMax Vertical Flue Run (Ø60\/100)\u003c\/strong\u003e\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;text-align:center;\"\u003e8 m\u003c\/td\u003e\n    \u003ctd style=\"padding:8px 12px;text-align:center;\"\u003e7 m\u003c\/td\u003e\n  \u003c\/tr\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"margin:28px 0;\"\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;padding:12px 16px;border-radius:6px 6px 0 0;font-weight:700;font-size:16px;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\n  \u003cdetails style=\"border:1px solid #ddd;border-top:none;padding:0;\"\u003e\n    \u003csummary style=\"padding:14px 16px;cursor:pointer;font-weight:600;background:#f9f9f9;\"\u003eWhich flue kit do I need for the E-Combi ONE?\u003c\/summary\u003e\n    \u003cdiv style=\"padding:14px 16px;border-top:1px solid #eee;\"\u003eThe E-Combi ONE uses the \u003cstrong\u003eAriston HE Ø60\/100 coaxial flue system\u003c\/strong\u003e. The standard horizontal kit is \u003cstrong\u003e3318073\u003c\/strong\u003e (1000mm); for vertical installations you need the \u003cstrong\u003e3318079 Vertical Starter\u003c\/strong\u003e plus one of: \u003cstrong\u003e3318080\u003c\/strong\u003e (125mm black terminal), \u003cstrong\u003e3318081\u003c\/strong\u003e (125mm red terminal), or \u003cstrong\u003e3319235\u003c\/strong\u003e (100mm leisure\/caravan terminal). The \u003cstrong\u003eSE flue accessories (3318003–3318006, 3319648)\u003c\/strong\u003e are \u003cstrong\u003enot compatible\u003c\/strong\u003e — these are for the Next Evo X water heater range only.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border:1px solid #ddd;border-top:none;padding:0;\"\u003e\n    \u003csummary style=\"padding:14px 16px;cursor:pointer;font-weight:600;background:#f9f9f9;\"\u003eCan I reuse my existing flue on a like-for-like swap?\u003c\/summary\u003e\n    \u003cdiv style=\"padding:14px 16px;border-top:1px solid #eee;\"\u003eIn many cases yes — this is the primary reason to order the boiler only. If the existing flue uses the \u003cstrong\u003eAriston HE Ø60\/100 coaxial system\u003c\/strong\u003e, and the Gas Safe engineer inspects it as undamaged and correctly routed, it can typically be reused with the E-Combi ONE. If the previous boiler was a different brand or used a different flue diameter or type, a new flue must be specified and ordered separately.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border:1px solid #ddd;border-top:none;padding:0;\"\u003e\n    \u003csummary style=\"padding:14px 16px;cursor:pointer;font-weight:600;background:#f9f9f9;\"\u003eWhich output should I choose — 24 kW or 30 kW?\u003c\/summary\u003e\n    \u003cdiv style=\"padding:14px 16px;border-top:1px solid #eee;\"\u003eThe practical difference is \u003cstrong\u003eDHW flow rate\u003c\/strong\u003e: 10.4 l\/min at 24 kW versus 12.5 l\/min at 30 kW. For a \u003cstrong\u003esingle-bathroom property with up to 10 radiators\u003c\/strong\u003e, the 24 kW is appropriate. For properties with \u003cstrong\u003etwo bathrooms or higher simultaneous hot water demand\u003c\/strong\u003e, the 30 kW is the better choice. A \u003cstrong\u003eheat loss calculation\u003c\/strong\u003e by the Gas Safe engineer is the only reliable method for confirming the correct output for a specific property.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border:1px solid #ddd;border-top:none;padding:0;\"\u003e\n    \u003csummary style=\"padding:14px 16px;cursor:pointer;font-weight:600;background:#f9f9f9;\"\u003eIs a Boiler Plus-compliant control required?\u003c\/summary\u003e\n    \u003cdiv style=\"padding:14px 16px;border-top:1px solid #eee;\"\u003eYes. For new boiler installations in England, \u003cstrong\u003eBoiler Plus (Building Regulations Part L)\u003c\/strong\u003e requires a \u003cstrong\u003etime and temperature zone control\u003c\/strong\u003e plus at least one of: a weather or load compensator, smart thermostat with automation, or flue gas heat recovery. The E-Combi ONE does not include controls in the box — a compatible thermostat such as the \u003cstrong\u003eCube S Net (3319126)\u003c\/strong\u003e or \u003cstrong\u003eCube RF\u003c\/strong\u003e must be specified to satisfy Boiler Plus. Neither is included in this listing.\u003c\/div\u003e\n  \u003c\/details\u003e\n\n  \u003cdetails style=\"border:1px solid #ddd;border-top:none;padding:0;\"\u003e\n    \u003csummary style=\"padding:14px 16px;cursor:pointer;font-weight:600;background:#f9f9f9;\"\u003eDoes the boiler come with anything to fulfil the hot water circuit connection?\u003c\/summary\u003e\n    \u003cdiv style=\"padding:14px 16px;border-top:1px solid #eee;\"\u003eYes — a \u003cstrong\u003etap kit (filling loop)\u003c\/strong\u003e and \u003cstrong\u003ewall mounting bracket\u003c\/strong\u003e are included in the box along with the LPG conversion kit. Compression fittings for the 22mm CH flow and return and 15mm gas inlet are required but not supplied — these are standard site materials.\u003c\/div\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Ariston","offers":[{"title":"24kW","offer_id":65085129523549,"sku":"AR-3301131","price":635.0,"currency_code":"GBP","in_stock":true},{"title":"30kW","offer_id":65085129556317,"sku":"AR-3301132","price":650.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/AristonE-CombiONE30LPGCombiBoiler.webp?v=1765306264","url":"https:\/\/qualityheating.co.uk\/products\/ariston-e-combi-one-24kw-and-30kw-condensing-combi-gas-boiler-boiler-only-no-flue","provider":"AIZO Quality Heating","version":"1.0","type":"link"}