{"product_id":"strom-auraheat-9kw-single-phase-35l-stored-combi-boiler-electric-combi-boiler-with-integrated-stainless-steel-cylinder","title":"Strom AuraHeat 9kW Single Phase Stored Combi Boiler - Electric Combi Boiler with 35L Integrated Stainless Steel Buffer Cylinder","description":"\u003cdiv style=\"font-size: 16px; max-width: 900px; margin: 0 auto; font-family: Arial, Helvetica, sans-serif; color: #222222; line-height: 1.6;\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eStrom AuraHeat 9kW Single Phase Stored Combi Boiler (SBSP9SC)\u003c\/strong\u003e combines Strom's self-modulating electric heat exchanger with a \u003cstrong\u003e35-litre integrated stainless steel buffer cylinder\u003c\/strong\u003e in a single wall-mounted unit. An \u003cstrong\u003eautomatic diverter valve\u003c\/strong\u003e switches the heat exchanger's output between the central heating circuit and the integral cylinder, so the boiler behaves like a combi for hot water while also driving radiators or underfloor heating. With \u003cstrong\u003eno flue, zero local carbon monoxide, and near-silent operation\u003c\/strong\u003e, it's designed as a drop-in replacement for off-grid, all-electric, or gas-free properties.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eFor central heating\u003c\/strong\u003e, the heat exchanger's multiple strands modulate from the full 9kW output down to as little as 1kW to track the property's heat demand. \u003cstrong\u003eAs soon as a hot water tap or shower is opened\u003c\/strong\u003e, the diverter gives priority to the 35L cylinder, in the same way a gas combi prioritises hot water over heating. With the cylinder at full capacity, the boiler supports \u003cstrong\u003eDHW flow rates of up to 12 litres per minute\u003c\/strong\u003e at an output temperature of \u003cstrong\u003eup to 55°C (at reduced flow rates)\u003c\/strong\u003e; even once the cylinder is fully depleted, the heat exchanger alone continues to deliver \u003cstrong\u003eup to 7 litres per minute\u003c\/strong\u003e, with the cylinder recovering to full temperature in around \u003cstrong\u003e20 minutes\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background-color: #008377cf; color: #ffffff; text-align: center; padding: 14px 8px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003e9kW\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eHeat Output\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background-color: #008377cf; color: #ffffff; text-align: center; padding: 14px 8px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003e230V\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eSingle Phase Supply\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background-color: #008377cf; color: #ffffff; text-align: center; padding: 14px 8px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003e35L\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eStainless Steel Cylinder\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background-color: #008377cf; color: #ffffff; text-align: center; padding: 14px 8px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003e12 LPM\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003ePeak DHW Flow Rate\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background-color: #008377cf; color: #ffffff; text-align: center; padding: 14px 8px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003eZero\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eFlue Required\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background-color: #008377cf; color: #ffffff; text-align: center; padding: 14px 8px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003eD\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eHeating ErP Rating\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 130px; background-color: #008377cf; color: #ffffff; text-align: center; padding: 14px 8px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003e920×570×300mm\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px;\"\u003eH × W × D\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 4px solid #c0392b; background-color: #fdecea; padding: 12px 16px; margin: 20px 0; border-radius: 4px;\"\u003e\n\u003cstrong style=\"color: #c0392b;\"\u003ePart P Notifiable Electrical Work\u003c\/strong\u003e\n\u003cp style=\"margin: 8px 0 0 0;\"\u003eAs an electric boiler, connecting the SBSP9SC is \u003cstrong\u003enotifiable electrical work\u003c\/strong\u003e under Building Regulations. Strom's installation guide requires that the electrical connection is carried out by a \u003cstrong\u003ecompetent person registered with a Part P scheme\u003c\/strong\u003e (such as NICEIC), who must issue an electrical installation certificate immediately after the live connection is made. Boiler installations of any fuel type, including electric, are notifiable building work in their own right.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 4px solid #d4900b; background-color: #fff8e6; padding: 12px 16px; margin: 20px 0; border-radius: 4px;\"\u003e\n\u003cstrong style=\"color: #9a6a00;\"\u003eConfirm Electrical Loading Before Specifying\u003c\/strong\u003e\n\u003cp style=\"margin: 8px 0 0 0;\"\u003eCylinder capacity (35L), DHW flow rates (12 L\/min charged, 7 L\/min depleted), maximum DHW temperature, and cylinder reheat time are confirmed for the AuraHeat Stored Combi range. However, the \u003cstrong\u003eamp draw, minimum breaker size, and minimum cable size for the SBSP9SC have not been confirmed against a model-specific datasheet\u003c\/strong\u003e and remain separate from the figures published for Strom's instant Combi\/System range. These should be checked against Strom's AuraHeat installation manual, or by contacting Strom at stromltd.com, before finalising a circuit design or quotation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 4px solid #008377; background-color: #e6f4f3; padding: 12px 16px; margin: 20px 0; border-radius: 4px;\"\u003e\n\u003cstrong style=\"color: #005c54;\"\u003eBuffer Cylinder vs. Instant-Only Combi\u003c\/strong\u003e\n\u003cp style=\"margin: 8px 0 0 0;\"\u003eStrom's standard Combi range (SBSP7C \/ SBSP11C \/ SBSP15C) heats domestic hot water \u003cstrong\u003einstantaneously\u003c\/strong\u003e with no storage, so peak flow rate is limited to whatever the heat exchanger alone can deliver. The \u003cstrong\u003eAuraHeat Stored Combi adds a 35L stainless steel buffer cylinder\u003c\/strong\u003e ahead of the heat exchanger, so with the cylinder charged the boiler can support a \u003cstrong\u003ehigher peak flow rate (up to 12 L\/min)\u003c\/strong\u003e than an instant-only unit of the same kW rating - while still falling back to a strong \u003cstrong\u003e7 L\/min instant supply\u003c\/strong\u003e once the buffer is depleted, recovering in around 20 minutes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin: 28px 0;\"\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"font-weight: bold; font-size: 17px; border-bottom: 2px solid #008377; padding-bottom: 6px; margin-bottom: 8px;\"\u003ePatented Multi-Strand Heat Exchanger\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eStrom's heat exchanger spreads the heating load across \u003cstrong\u003emultiple independent heating strands\u003c\/strong\u003e rather than a single element, with heat transferred evenly across the whole surface area. This eliminates the hotspots that cause limescale to bake onto an element and shorten its life, and because the water circuit is kept physically separate from the strands themselves, \u003cstrong\u003ecorrosion is reduced\u003c\/strong\u003e and any strand can be replaced individually rather than swapping the whole heat exchanger.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"font-weight: bold; font-size: 17px; border-bottom: 2px solid #008377; padding-bottom: 6px; margin-bottom: 8px;\"\u003eSelf-Modulating Down to 1kW\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eBecause each heating strand can be switched independently, the boiler tracks demand in fine steps across its \u003cstrong\u003e9kW output range, modulating down to as little as 1kW\u003c\/strong\u003e. This reduces cycling, helps maintain a steadier room temperature, and avoids the abrupt on\/off behaviour associated with single-element electric boilers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"font-weight: bold; font-size: 17px; border-bottom: 2px solid #008377; padding-bottom: 6px; margin-bottom: 8px;\"\u003e35-Litre Stainless Steel Buffer Cylinder With Integrated Coil\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eThe integral cylinder is heated indirectly via an \u003cstrong\u003eintegrated coil\u003c\/strong\u003e rather than direct immersion, keeping domestic hot water separated from the heat exchanger's heating strands. This significantly \u003cstrong\u003eincreases scale resistance\u003c\/strong\u003e in hard water areas, since any limescale forms on the coil rather than fouling the heating elements themselves, helping protect the heat exchanger's output over the life of the boiler.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"font-weight: bold; font-size: 17px; border-bottom: 2px solid #008377; padding-bottom: 6px; margin-bottom: 8px;\"\u003eAutomatic Diverter Valve for Heating or Hot Water\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eA \u003cstrong\u003ebuilt-in diverter\u003c\/strong\u003e automatically switches the heat exchanger's output between the central heating circuit and the 35L cylinder. When a hot water demand is detected, the diverter prioritises the cylinder - just as a gas combi prioritises hot water over heating - then returns output to the heating circuit once the demand ends.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"font-weight: bold; font-size: 17px; border-bottom: 2px solid #008377; padding-bottom: 6px; margin-bottom: 8px;\"\u003eProgrammable Hot Water Priority\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eProgrammable parameters let installers and users \u003cstrong\u003eprioritise stored volume, instantaneous flow rate, or a balance of both\u003c\/strong\u003e. A household with occasional long showers may benefit from prioritising volume to keep the cylinder topped up, while one with frequent short draw-offs may prefer prioritising flow rate for faster recovery between uses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"font-weight: bold; font-size: 17px; border-bottom: 2px solid #008377; padding-bottom: 6px; margin-bottom: 8px;\"\u003eFlue-Free, Zero Carbon Monoxide Operation\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eWith \u003cstrong\u003eno combustion taking place\u003c\/strong\u003e, the AuraHeat range produces zero local carbon monoxide and needs no flue terminal, soffit clearance, or terminal guard. This opens up siting options a gas or oil boiler couldn't use, including internal cupboards, flats, and properties where external wall access for a flue isn't practical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"font-weight: bold; font-size: 17px; border-bottom: 2px solid #008377; padding-bottom: 6px; margin-bottom: 8px;\"\u003eTouchscreen Control With a Familiar Layout\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eThe on-board \u003cstrong\u003etouchscreen display\u003c\/strong\u003e mirrors the layout installers and homeowners already know from gas, oil, and LPG boilers, showing heating and hot water status, current temperature, and a weekly programmer. This means handover to the end user doesn't require retraining on an unfamiliar interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv style=\"font-weight: bold; font-size: 17px; border-bottom: 2px solid #008377; padding-bottom: 6px; margin-bottom: 8px;\"\u003eBuilt for Off-Grid and Renewable Setups\u003c\/div\u003e\n\u003cp style=\"margin: 0;\"\u003eStrom's electric boiler range is designed to sit alongside \u003cstrong\u003esolar PV generation and time-of-use tariffs such as Economy 7\/10\u003c\/strong\u003e, letting the cylinder be heated during cheap-rate or self-generated periods and drawn down later in the day - a configuration not available to instant-only combi boilers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 28px 0; font-size: 15px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #008377cf;\"\u003e\n\u003ctd style=\"padding: 10px 12px; color: #ffffff; font-weight: bold;\" colspan=\"2\"\u003eGeneral\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eStrom Limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eRange\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eAuraHeat Stored Combi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eManufacturer Part Number (MPN)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eSBSP9SC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eBoiler Type\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eElectric Stored Combination Boiler with 35L integrated stainless steel buffer cylinder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eHeat Output\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003e9kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eLarger Sibling Model\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eSBSP13SC (13.5kW, same AuraHeat Stored Combi design)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #008377cf;\"\u003e\n\u003ctd style=\"padding: 10px 12px; color: #ffffff; font-weight: bold;\" colspan=\"2\"\u003eElectrical Supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003ePhase\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eSingle Phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eSupply Voltage\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003e230VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eAmps \/ Minimum Breaker \/ Minimum Cable Size\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eConfirm against Strom's AuraHeat installation manual *\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #008377cf;\"\u003e\n\u003ctd style=\"padding: 10px 12px; color: #ffffff; font-weight: bold;\" colspan=\"2\"\u003eHeating Performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eHeating ErP Rating\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eD *\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eMax. Heating Flow Temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003e80°C *\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eMin. Heating Flow Temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003e20°C *\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eMax. Heating Pressure\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003e1.5 bar *\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eMin. Heating Pressure\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003e0.5 bar *\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #008377cf;\"\u003e\n\u003ctd style=\"padding: 10px 12px; color: #ffffff; font-weight: bold;\" colspan=\"2\"\u003eHot Water Performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eHot Water Storage\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003e35-litre stainless steel buffer cylinder with integrated coil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eDHW Flow Rate - Cylinder Fully Charged\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eUp to 12 L\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eDHW Flow Rate - Cylinder Depleted\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eUp to 7 L\/min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eMax. DHW Output Temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eUp to 55°C (at reduced flow rates)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eCylinder Reheat Time\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eApprox. 20 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eDiverter Valve\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eIntegrated, automatic central heating \/ DHW switching\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #008377cf;\"\u003e\n\u003ctd style=\"padding: 10px 12px; color: #ffffff; font-weight: bold;\" colspan=\"2\"\u003eDimensions \u0026amp; Installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003e920 × 570 × 300mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eFlue Required\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px; border-bottom: 1px solid #cccccc;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #e6f4f3;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003ePump \u0026amp; Expansion Vessel\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003eIntegrated within the boiler casing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"font-size: 13px; color: #555555; margin-top: -10px;\"\u003e* Figures marked with an asterisk reflect Strom's published range-wide specifications for single-phase electric boilers and have not been verified against a model-specific datasheet for the AuraHeat SBSP9SC at the time of writing. Confirm electrical loading (amps, minimum breaker, minimum cable size) and heating pressure\/temperature limits against Strom's AuraHeat installation and user guide, or by contacting Strom Limited directly, before specifying or installing.\u003c\/p\u003e\n\u003cdiv style=\"margin: 28px 0;\"\u003e\n\u003cdetails style=\"margin-bottom: 10px; border: 1px solid #008377; border-radius: 4px; overflow: hidden;\"\u003e\n\u003csummary style=\"background-color: #008377cf; color: #ffffff; padding: 10px 14px; cursor: pointer; font-weight: bold; list-style: none;\"\u003eWhat is a \"stored combi\" boiler, and how is it different from a normal combi?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eA combi (combination) boiler normally heats domestic hot water \u003cstrong\u003einstantaneously\u003c\/strong\u003e as it passes through, with output limited to whatever the heat exchanger alone can deliver. A stored combi, like this AuraHeat model, adds a \u003cstrong\u003e35-litre stainless steel buffer cylinder\u003c\/strong\u003e ahead of the heat exchanger, allowing higher peak flow rates (up to 12 L\/min) when the cylinder is charged, while still providing a strong 7 L\/min instant supply once it's depleted.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px; border: 1px solid #008377; border-radius: 4px; overflow: hidden;\"\u003e\n\u003csummary style=\"background-color: #008377cf; color: #ffffff; padding: 10px 14px; cursor: pointer; font-weight: bold; list-style: none;\"\u003eDoes the Strom AuraHeat 9kW need a flue?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eNo. As an electric boiler there is no combustion, so \u003cstrong\u003eno flue, terminal, or soffit clearance is required\u003c\/strong\u003e. It still needs to be wall-mounted with adequate clearance around the casing for servicing and ventilation, as set out in Strom's installation guidance.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px; border: 1px solid #008377; border-radius: 4px; overflow: hidden;\"\u003e\n\u003csummary style=\"background-color: #008377cf; color: #ffffff; padding: 10px 14px; cursor: pointer; font-weight: bold; list-style: none;\"\u003eWhat's the difference between the SBSP9SC and SBSP13SC?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eBoth are part of the \u003cstrong\u003eAuraHeat Stored Combi range\u003c\/strong\u003e and share the same integrated-cylinder design and 920 x 570 x 300mm casing. The SBSP9SC delivers 9kW of heat output, while the SBSP13SC steps this up to \u003cstrong\u003e13.5kW\u003c\/strong\u003e for properties with a higher heat loss or hot water demand. Both are single-phase, 230V units.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px; border: 1px solid #008377; border-radius: 4px; overflow: hidden;\" open=\"\"\u003e\n\u003csummary style=\"background-color: #008377cf; color: #ffffff; padding: 10px 14px; cursor: pointer; font-weight: bold; list-style: none;\"\u003eHow does the boiler manage central heating and hot water at the same time?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eThe AuraHeat Stored Combi uses a \u003cstrong\u003ebuilt-in diverter valve\u003c\/strong\u003e to direct the heat exchanger's output. During normal operation it heats the central heating circuit and keeps the 35L cylinder topped up; as soon as a hot water tap or shower is opened, the diverter switches priority to the cylinder to meet the DHW demand, then reverts to heating once the demand ends - the same priority logic used by gas combi boilers.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px; border: 1px solid #008377; border-radius: 4px; overflow: hidden;\"\u003e\n\u003csummary style=\"background-color: #008377cf; color: #ffffff; padding: 10px 14px; cursor: pointer; font-weight: bold; list-style: none;\"\u003eWhat happens to hot water flow and temperature if the cylinder runs low?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eWith the 35L cylinder fully charged, the boiler supports DHW flow rates of \u003cstrong\u003eup to 12 litres per minute at up to 55°C (at reduced flow rates)\u003c\/strong\u003e. If the cylinder becomes depleted during heavy or prolonged use, the heat exchanger continues to supply hot water directly at \u003cstrong\u003eup to 7 litres per minute\u003c\/strong\u003e, so the household isn't left without hot water - the cylinder then recovers to full temperature in around \u003cstrong\u003e20 minutes\u003c\/strong\u003e.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px; border: 1px solid #008377; border-radius: 4px; overflow: hidden;\"\u003e\n\u003csummary style=\"background-color: #008377cf; color: #ffffff; padding: 10px 14px; cursor: pointer; font-weight: bold; list-style: none;\"\u003eWill this boiler need annual servicing under unvented cylinder regulations (G3)?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eThe 35L cylinder is heated indirectly via an integrated coil, but whether the \u003cstrong\u003edomestic hot water side of the cylinder is vented or unvented\u003c\/strong\u003e determines whether Building Regulations Part G (G3) - and its requirements for a temperature \u0026amp; pressure relief valve, discharge pipework, and annual maintenance - applies. This should be confirmed from Strom's AuraHeat installation documentation before specifying, as it affects the ongoing servicing obligations passed on to the homeowner.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px; border: 1px solid #008377; border-radius: 4px; overflow: hidden;\"\u003e\n\u003csummary style=\"background-color: #008377cf; color: #ffffff; padding: 10px 14px; cursor: pointer; font-weight: bold; list-style: none;\"\u003eWhat electrical supply does the SBSP9SC need?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eIt runs from a \u003cstrong\u003esingle-phase 230VAC supply\u003c\/strong\u003e, in line with the rest of Strom's electric boiler range. The exact amp draw, and the minimum breaker and cable sizes required for a 9kW stored combi unit, should be taken from Strom's AuraHeat-specific installation manual, since connection is notifiable electrical work requiring a Part P certificate.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 10px; border: 1px solid #008377; border-radius: 4px; overflow: hidden;\"\u003e\n\u003csummary style=\"background-color: #008377cf; color: #ffffff; padding: 10px 14px; cursor: pointer; font-weight: bold; list-style: none;\"\u003eCan the AuraHeat 9kW be used with solar panels or on an off-grid system?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 12px 14px;\"\u003eStrom's electric boiler range, including the AuraHeat Stored Combi, is designed to work alongside \u003cstrong\u003esolar PV generation and time-of-use tariffs such as Economy 7\/10\u003c\/strong\u003e - the cylinder can store heat generated or bought during cheap-rate periods for use later in the day.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Strom","offers":[{"title":"Default Title","offer_id":64982942318941,"sku":"SBSP9SC","price":2670.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/StromAuraHeatSinglePhaseStoredCombiBoiler-ElectricCombiBoilerwithIntegratedStainlessSteelCylinder.jpg?v=1781542593","url":"https:\/\/qualityheating.co.uk\/products\/strom-auraheat-9kw-single-phase-35l-stored-combi-boiler-electric-combi-boiler-with-integrated-stainless-steel-cylinder","provider":"AIZO Quality Heating","version":"1.0","type":"link"}