{"product_id":"strom-auraheat-13-5kw-single-phase-stored-combi-boiler-electric-combi-boiler-with-35l-integrated-stainless-steel-buffer-cylinder","title":"Strom AuraHeat 13.5kW 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\n  \u003cp\u003eThe \u003cstrong\u003eStrom AuraHeat 13.5kW Single Phase Stored Combi Boiler (SBSP13SC)\u003c\/strong\u003e is the higher-output model in Strom's AuraHeat Stored Combi range, combining their 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, the 13.5kW model suits properties with a higher heat loss than the 9kW SBSP9SC can comfortably cover, while keeping the same footprint.\u003c\/p\u003e\n\n  \u003cp\u003e\u003cstrong\u003eFor central heating\u003c\/strong\u003e, the heat exchanger's multiple strands modulate from the full 13.5kW 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\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;\"\u003e13.5kW\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\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 SBSP13SC 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. At 13.5kW this unit will draw significantly more current than the 9kW SBSP9SC, so the supply, breaker, and cable must be sized for the higher load specifically.\u003c\/p\u003e\n  \u003c\/div\u003e\n\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 SBSP13SC 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 - particularly given the higher current draw at 13.5kW may push beyond a standard domestic single-phase supply in some properties.\u003c\/p\u003e\n  \u003c\/div\u003e\n\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. The 13.5kW SBSP13SC adds extra heating headroom over the 9kW SBSP9SC within the same 920 x 570 x 300mm casing.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"display:grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap:18px; margin:28px 0;\"\u003e\n\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\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 Across a Wider Range\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\u003e13.5kW output range, modulating down to as little as 1kW\u003c\/strong\u003e. The wider span between minimum and maximum output gives this model more flexibility to match larger heat loads at peak demand while still stepping down gently for smaller calls on milder days, reducing cycling and avoiding the abrupt on\/off behaviour associated with single-element electric boilers.\u003c\/p\u003e\n    \u003c\/div\u003e\n\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\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\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\n    \u003cdiv\u003e\n      \u003cdiv style=\"font-weight:bold; font-size:17px; border-bottom:2px solid #008377; padding-bottom:6px; margin-bottom:8px;\"\u003eMore Heating Headroom, Same Footprint\u003c\/div\u003e\n      \u003cp style=\"margin:0;\"\u003eThe SBSP13SC shares the \u003cstrong\u003esame 920 x 570 x 300mm casing\u003c\/strong\u003e as the 9kW SBSP9SC, but delivers 13.5kW of heat output. For properties with a higher calculated heat loss, this means stepping up to the larger output doesn't require finding additional wall space or a larger airing cupboard - the upgrade is purely on the electrical supply side.\u003c\/p\u003e\n    \u003c\/div\u003e\n\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\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\n  \u003c\/div\u003e\n\n  \u003ctable style=\"width:100%; border-collapse:collapse; margin:28px 0; font-size:15px;\"\u003e\n    \u003ctr style=\"background-color:#008377CF;\"\u003e\n      \u003ctd colspan=\"2\" style=\"padding:10px 12px; color:#ffffff; font-weight:bold;\"\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;\"\u003eSBSP13SC\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;\"\u003e13.5kW\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd style=\"padding:8px 12px; border-bottom:1px solid #cccccc;\"\u003eSmaller Sibling Model\u003c\/td\u003e\n      \u003ctd style=\"padding:8px 12px; border-bottom:1px solid #cccccc;\"\u003eSBSP9SC (9kW, same AuraHeat Stored Combi design)\u003c\/td\u003e\n    \u003c\/tr\u003e\n\n    \u003ctr style=\"background-color:#008377CF;\"\u003e\n      \u003ctd colspan=\"2\" style=\"padding:10px 12px; color:#ffffff; font-weight:bold;\"\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\n    \u003ctr style=\"background-color:#008377CF;\"\u003e\n      \u003ctd colspan=\"2\" style=\"padding:10px 12px; color:#ffffff; font-weight:bold;\"\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\n    \u003ctr style=\"background-color:#008377CF;\"\u003e\n      \u003ctd colspan=\"2\" style=\"padding:10px 12px; color:#ffffff; font-weight:bold;\"\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\n    \u003ctr style=\"background-color:#008377CF;\"\u003e\n      \u003ctd colspan=\"2\" style=\"padding:10px 12px; color:#ffffff; font-weight:bold;\"\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\/table\u003e\n\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 SBSP13SC 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\n  \u003cdiv style=\"margin:28px 0;\"\u003e\n\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\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 13.5kW 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\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 SBSP13SC and the SBSP9SC?\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 SBSP13SC delivers \u003cstrong\u003e13.5kW\u003c\/strong\u003e of heat output, compared with 9kW for the SBSP9SC, for properties with a higher heat loss or hot water demand. Both are single-phase, 230V units, though the 13.5kW model will draw more current and should be sized accordingly.\u003c\/div\u003e\n    \u003c\/details\u003e\n\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;\"\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\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\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\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 SBSP13SC 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. However, at 13.5kW the current draw will be notably higher than the 9kW SBSP9SC, so the exact amps, and the minimum breaker and cable sizes required, should be taken from Strom's AuraHeat-specific installation manual and checked against the property's existing supply capacity before specifying. Connection is notifiable electrical work requiring a Part P certificate.\u003c\/div\u003e\n    \u003c\/details\u003e\n\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 13.5kW 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\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"Strom","offers":[{"title":"Default Title","offer_id":64983010476381,"sku":"SBSP13SC","price":2770.0,"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-13-5kw-single-phase-stored-combi-boiler-electric-combi-boiler-with-35l-integrated-stainless-steel-buffer-cylinder","provider":"AIZO Quality Heating","version":"1.0","type":"link"}