{"product_id":"harlequin-heatstream-210-indirect-electric-plus-thermal-store","title":"Harlequin HeatStream 210 Indirect Electric PLUS Thermal Store","description":"\u003cdiv style=\"font-family:Arial,sans-serif;font-size:16px;color:#1a1a1a;max-width:900px;margin:0 auto;line-height:1.6;\"\u003e\n\n\u003cp style=\"font-size:17px;margin-bottom:20px;\"\u003e\nThe \u003cstrong\u003eHarlequin HeatStream 210 Indirect\u003c\/strong\u003e — sold as the \u003cstrong\u003eHeatStream 210 Electric PLUS\u003c\/strong\u003e (model \u003cstrong\u003eHS210EPLUS\u003c\/strong\u003e) — is the flagship of the HeatStream range: a \u003cstrong\u003e210-litre open-vented thermal store\u003c\/strong\u003e that accepts heat from \u003cstrong\u003eboth electric immersion heaters and a separate primary heat source\u003c\/strong\u003e such as a gas or oil boiler, heat pump, or district heating network. With a \u003cstrong\u003e14-bar rated primary coil\u003c\/strong\u003e capable of pre-heating the full store in \u003cstrong\u003e24 minutes\u003c\/strong\u003e, and a standing heat loss of only \u003cstrong\u003e1.24 kWh\/day\u003c\/strong\u003e, the HS210EPLUS is the ideal high-capacity solution for larger homes and apartments making the transition to hybrid or all-electric heating. As with all HeatStream models, it is \u003cstrong\u003eopen-vented and exempt from Part G of the Building Regulations\u003c\/strong\u003e, requiring no G3-qualified engineer and no mandatory annual safety inspection.\n\u003c\/p\u003e\n\n\u003c!-- Stat strip --\u003e\n\u003cdiv style=\"display:flex;flex-wrap:wrap;gap:12px;margin-bottom:28px;\"\u003e\n  \u003cdiv style=\"flex:1;min-width:130px;background:#008377CF;color:#fff;border-radius:8px;padding:16px 12px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:26px;font-weight:700;\"\u003e210 L\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003eStorage Capacity\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:130px;background:#008377CF;color:#fff;border-radius:8px;padding:16px 12px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:26px;font-weight:700;\"\u003eErP B\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003eEnergy Rating\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:130px;background:#008377CF;color:#fff;border-radius:8px;padding:16px 12px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:26px;font-weight:700;\"\u003e14 bar\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003ePrimary Coil Rating\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:130px;background:#008377CF;color:#fff;border-radius:8px;padding:16px 12px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:26px;font-weight:700;\"\u003e281 L\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003eHot Water at 70°C Store\u003c\/div\u003e\n  \u003c\/div\u003e\n  \u003cdiv style=\"flex:1;min-width:130px;background:#008377CF;color:#fff;border-radius:8px;padding:16px 12px;text-align:center;\"\u003e\n    \u003cdiv style=\"font-size:26px;font-weight:700;\"\u003e24 min\u003c\/div\u003e\n    \u003cdiv style=\"font-size:13px;margin-top:4px;\"\u003ePrimary Coil Heat-Up\u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003c!-- Teal info callout --\u003e\n\u003cdiv style=\"background:#e6f4f3;border-left:4px solid #008377CF;padding:14px 18px;border-radius:6px;margin-bottom:24px;\"\u003e\n  \u003cstrong style=\"color:#005c54;\"\u003eThe Highest-Capacity HeatStream with Full Multi-Source Flexibility:\u003c\/strong\u003e The HS210EPLUS combines \u003cstrong\u003e202 litres of thermal storage\u003c\/strong\u003e, a \u003cstrong\u003e14-bar primary coil\u003c\/strong\u003e for rapid boiler or district heating charge, and a \u003cstrong\u003e3 kW + 3 kW immersion heater\u003c\/strong\u003e for electric backup and boost — all in the same compact 520 × 520 mm footprint as the 150-litre models. Up to \u003cstrong\u003e281 litres of usable hot water\u003c\/strong\u003e can be delivered at 15 l\/min from a single charge at 70°C.\n\u003c\/div\u003e\n\n\u003c!-- Section heading --\u003e\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;border-radius:6px;margin-bottom:18px;\"\u003e\n  \u003cstrong style=\"font-size:16px;\"\u003eKey Features\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin-bottom:28px;\"\u003e\n\n  \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:8px;padding:18px;\"\u003e\n    \u003cdiv style=\"font-weight:700;color:#005c54;margin-bottom:8px;\"\u003e🔵 No Part G \/ No G3 Qualification\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eThe \u003cstrong\u003eopen-vented thermal store design\u003c\/strong\u003e places the HS210EPLUS outside the scope of Part G, meaning no G3-qualified engineer, no expansion vessel and no T\u0026amp;P relief valve. Any competent heating technician can install and commission it.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:8px;padding:18px;\"\u003e\n    \u003cdiv style=\"font-weight:700;color:#005c54;margin-bottom:8px;\"\u003e🔥 Fast Primary Coil Heat-Up — 24 Minutes\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eThe \u003cstrong\u003efactory-fitted primary coil heats the full 210-litre store in just 24 minutes\u003c\/strong\u003e at 15 l\/min primary flow (15–60°C). This dramatically outperforms immersion-only heat-up times, ensuring rapid hot water recovery after heavy use.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:8px;padding:18px;\"\u003e\n    \u003cdiv style=\"font-weight:700;color:#005c54;margin-bottom:8px;\"\u003e🏗️ 14-Bar Primary Coil — District Heating Compatible\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eRated to \u003cstrong\u003e14 bar operating pressure\u003c\/strong\u003e, the primary coil is suitable for high-pressure district heating networks as well as conventional gas, oil and LPG boilers. Primary coil pressure drop at 15 l\/min is 134 mbar — well within standard pump capabilities.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:8px;padding:18px;\"\u003e\n    \u003cdiv style=\"font-weight:700;color:#005c54;margin-bottom:8px;\"\u003e⚡ Dual Immersion Heater Backup \u0026amp; Boost\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eThe \u003cstrong\u003e3 kW + 3 kW immersion heater\u003c\/strong\u003e operates independently of the primary coil. The short boost element delivers \u003cstrong\u003e50 litres within 20 minutes\u003c\/strong\u003e when the boiler circuit is unavailable. Both elements can run simultaneously with the primary coil for maximum recovery speed.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:8px;padding:18px;\"\u003e\n    \u003cdiv style=\"font-weight:700;color:#005c54;margin-bottom:8px;\"\u003e☀️ Solar PV \u0026amp; Off-Peak Tariff Ready\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eCharge the 210-litre store with cheap overnight electricity or solar PV surplus via the immersion elements, then top up via the boiler when primary heat is cheapest. The \u003cstrong\u003ecombination of sources maximises energy cost savings\u003c\/strong\u003e throughout the year.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:8px;padding:18px;\"\u003e\n    \u003cdiv style=\"font-weight:700;color:#005c54;margin-bottom:8px;\"\u003e📐 Same Compact 520 × 520 mm Footprint\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003eAt \u003cstrong\u003e520 × 520 × 1,650 mm\u003c\/strong\u003e and 48 kg empty (250 kg filled), the HS210EPLUS carries a larger water mass but an identical floor footprint to the 150-litre PLUS model. It passes through a standard doorway and fits into most plant rooms or airing cupboards.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:8px;padding:18px;\"\u003e\n    \u003cdiv style=\"font-weight:700;color:#005c54;margin-bottom:8px;\"\u003e🛡️ Non-Corrosive Long-Life Construction\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003e\u003cstrong\u003ePolyethylene outer shell\u003c\/strong\u003e, \u003cstrong\u003epolypropylene inner tank\u003c\/strong\u003e and \u003cstrong\u003estainless steel corrugated coils\u003c\/strong\u003e deliver a corrosion-resistant system suited to all UK water quality conditions, including hard-water and chloride-rich supplies, for long-term reliability.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:8px;padding:18px;\"\u003e\n    \u003cdiv style=\"font-weight:700;color:#005c54;margin-bottom:8px;\"\u003e🔧 Low Maintenance — All Connections on Top\u003c\/div\u003e\n    \u003cp style=\"margin:0;font-size:15px;\"\u003e\u003cstrong\u003eAll DHW and primary circuit connections are on top\u003c\/strong\u003e. Primary circuit uses 22 mm compression connections. Maintenance requires only a \u003cstrong\u003e6-monthly water level top-up\u003c\/strong\u003e; a central heating filter on the primary circuit is recommended to protect coil components long-term.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\n\u003c!-- Spec table --\u003e\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;border-radius:6px;margin-bottom:18px;\"\u003e\n  \u003cstrong style=\"font-size:16px;\"\u003eTechnical Specifications\u003c\/strong\u003e\n\u003c\/div\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;margin-bottom:28px;font-size:15px;\"\u003e\n  \u003ctbody\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;width:50%;\"\u003eModel Code\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003eHS210EPLUS\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eStorage Volume\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e202 litres (nominal)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eDimensions (L × W × H)\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e520 × 520 × 1,650 mm\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eEmpty Weight\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e48 kg\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eFilled Weight\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e250 kg\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eErP Energy Rating\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003eB\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eStanding Heat Loss\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e1.24 kWh\/24h\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eImmersion Heaters\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003eDual element: 3 kW (short\/boost) + 3 kW (long)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eHeat-Up via Primary Coil (15–60°C at 15 l\/min)\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e24 minutes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eFull Heat-Up via Long Immersion (15–60°C)\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e210 minutes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eFull Heat-Up via Both Immersions (15–60°C)\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e105 minutes\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eBoost Reheat (45–60°C, short element)\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e20 minutes (50 litres)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eHot Water at 15 l\/min (60°C store)\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e188 litres (no reheat)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eHot Water at 15 l\/min (70°C store)\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e281 litres\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eDHW Coil Max Operating Pressure\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e3 bar\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003ePrimary Coil Max Operating Pressure\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e14 bar\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003ePrimary Coil Pressure Drop at 15 l\/min\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e134 mbar\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003ePrimary Coil Connections\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e22 mm compression\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003ePrimary Coil Thermostat (pre-set \/ range)\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e65°C pre-set \/ adjustable 45–75°C\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eMax Storage Temperature\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e85°C\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003ePipe Connections (DHW)\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003e22 mm (all on top)\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eOverfill Connection\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003eG ¾\"\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eCompatible Heat Sources\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003eGas boiler, oil boiler, LPG, district heating, heat pump\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eOuter Tank Material\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003ePolyethylene\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eInner Tank Material\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003ePolypropylene\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#fff;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eCoil Material\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003eStainless steel corrugated\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr style=\"background:#f0faf9;\"\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;font-weight:600;\"\u003eMPN\u003c\/td\u003e\n      \u003ctd style=\"padding:10px 14px;border:1px solid #c8e6e3;\"\u003eHS210EPLUS\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003c!-- Amber warning callout --\u003e\n\u003cdiv style=\"background:#fff8e1;border-left:4px solid #f59e0b;padding:14px 18px;border-radius:6px;margin-bottom:28px;\"\u003e\n  \u003cstrong style=\"color:#92400e;\"\u003eFloor Loading \u0026amp; Primary Circuit Note:\u003c\/strong\u003e When filled, the HS210EPLUS weighs \u003cstrong\u003e250 kg\u003c\/strong\u003e — ensure the installation floor is rated for this load. The primary heat supply circuit must be \u003cstrong\u003efully pumped\u003c\/strong\u003e; gravity circulation is not suitable. Fit a \u003cstrong\u003ecentral heating filter\u003c\/strong\u003e on the primary circuit to protect the internal coil. Isolate power before removing protective covers.\n\u003c\/div\u003e\n\n\u003c!-- FAQ --\u003e\n\u003cdiv style=\"background:#008377CF;color:#fff;padding:10px 16px;border-radius:6px;margin-bottom:18px;\"\u003e\n  \u003cstrong style=\"font-size:16px;\"\u003eFrequently Asked Questions\u003c\/strong\u003e\n\u003c\/div\u003e\n\n\u003cdetails style=\"border:1px solid #c8e6e3;border-radius:6px;margin-bottom:10px;overflow:hidden;\"\u003e\n  \u003csummary style=\"background:#008377CF;color:#fff;padding:12px 16px;cursor:pointer;font-weight:600;list-style:none;\"\u003eHow much usable hot water does the HS210EPLUS deliver?\u003c\/summary\u003e\n  \u003cdiv style=\"padding:14px 16px;background:#f0faf9;\"\u003e\n    At a draw-off rate of 15 l\/min with a store temperature of 70°C, the HS210EPLUS delivers \u003cstrong\u003e281 litres of usable blended hot water\u003c\/strong\u003e without reheating. At 60°C store temperature this is \u003cstrong\u003e188 litres\u003c\/strong\u003e. The short boost element adds a further 50 litres within 20 minutes when needed.\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"border:1px solid #c8e6e3;border-radius:6px;margin-bottom:10px;overflow:hidden;\"\u003e\n  \u003csummary style=\"background:#008377CF;color:#fff;padding:12px 16px;cursor:pointer;font-weight:600;list-style:none;\"\u003eIs the HeatStream 210 Indirect suitable for a district heating connection?\u003c\/summary\u003e\n  \u003cdiv style=\"padding:14px 16px;background:#f0faf9;\"\u003e\n    Yes — this is one of its most distinctive capabilities. The \u003cstrong\u003eprimary coil is rated to 14 bar\u003c\/strong\u003e, well above typical district heating network pressures, and the 134 mbar pressure drop at 15 l\/min is compatible with standard district heating heat interface units (HIUs). The unit is WRAS-compliant for potable hot water production.\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"border:1px solid #c8e6e3;border-radius:6px;margin-bottom:10px;overflow:hidden;\"\u003e\n  \u003csummary style=\"background:#008377CF;color:#fff;padding:12px 16px;cursor:pointer;font-weight:600;list-style:none;\"\u003eCan the HS210EPLUS charge from solar PV as well as a boiler?\u003c\/summary\u003e\n  \u003cdiv style=\"padding:14px 16px;background:#f0faf9;\"\u003e\n    Yes. The \u003cstrong\u003eimmersion heaters operate completely independently\u003c\/strong\u003e of the primary coil. You can schedule the immersion heaters to charge the store using solar PV surplus or off-peak electricity, while the boiler primary coil provides top-up heat during peak demand periods — maximising efficiency from all available energy sources.\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"border:1px solid #c8e6e3;border-radius:6px;margin-bottom:10px;overflow:hidden;\"\u003e\n  \u003csummary style=\"background:#008377CF;color:#fff;padding:12px 16px;cursor:pointer;font-weight:600;list-style:none;\"\u003eWhat is the difference between the HS210EPLUS and HS150EPLUS?\u003c\/summary\u003e\n  \u003cdiv style=\"padding:14px 16px;background:#f0faf9;\"\u003e\n    Both models share the same 520 × 520 mm footprint and primary coil specification. The HS210EPLUS is \u003cstrong\u003e335 mm taller\u003c\/strong\u003e (1,650 mm vs 1,315 mm), stores \u003cstrong\u003e202 litres\u003c\/strong\u003e vs 152 litres, delivers \u003cstrong\u003e281 litres at 70°C\u003c\/strong\u003e vs 180 litres, has a slightly higher primary coil pressure drop (134 mbar vs 107 mbar) and weighs 250 kg filled vs 191 kg. It is the right choice for larger households or higher hot water demand.\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"border:1px solid #c8e6e3;border-radius:6px;margin-bottom:10px;overflow:hidden;\"\u003e\n  \u003csummary style=\"background:#008377CF;color:#fff;padding:12px 16px;cursor:pointer;font-weight:600;list-style:none;\"\u003eDoes the HS210EPLUS need an annual service?\u003c\/summary\u003e\n  \u003cdiv style=\"padding:14px 16px;background:#f0faf9;\"\u003e\n    No mandatory annual safety inspection is required. The recommended maintenance is a \u003cstrong\u003e6-monthly water level top-up\u003c\/strong\u003e via the filling loop. Additionally, it is good practice to check the primary circuit filter periodically and flush the system if water quality deteriorates.\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails style=\"border:1px solid #c8e6e3;border-radius:6px;margin-bottom:10px;overflow:hidden;\"\u003e\n  \u003csummary style=\"background:#008377CF;color:#fff;padding:12px 16px;cursor:pointer;font-weight:600;list-style:none;\"\u003eWhat flow rate does the mains supply need to deliver?\u003c\/summary\u003e\n  \u003cdiv style=\"padding:14px 16px;background:#f0faf9;\"\u003e\n    For optimum performance, the incoming mains supply should achieve a minimum of \u003cstrong\u003e12 l\/min at 1 bar dynamic pressure\u003c\/strong\u003e. If this cannot be achieved, a cold-water booster set should be installed. Mains supply pressure must not exceed \u003cstrong\u003e3 bar\u003c\/strong\u003e without a pressure reducing valve upstream of the tank.\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/div\u003e","brand":"Harlequin","offers":[{"title":"Default Title","offer_id":64634151076189,"sku":"HS210EPLUS","price":1700.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/HarlequinHeatStreamElectricThermalStoreDirect.webp?v=1778090532","url":"https:\/\/qualityheating.co.uk\/products\/harlequin-heatstream-210-indirect-electric-plus-thermal-store","provider":"AIZO Quality Heating","version":"1.0","type":"link"}