{"title":"EHS","description":"\u003cp\u003eEHS electric heating solutions are designed to provide efficient, low-emission space heating for modern homes using wet central heating or underfloor heating systems. The EHS Primus electric system boilers offer a practical alternative to traditional gas system boilers, connecting directly to existing radiators and pipework without the need for major system changes.\u003c\/p\u003e\n\n\u003cp\u003eThe EHS Primus 12kW and 14kW electric system boilers are well suited to medium and larger residential properties. When paired with an unvented indirect hot water cylinder, they provide a dependable hot water supply for multi-bathroom homes. Integrated control compatibility allows users to benefit from off-peak electricity tariffs, supporting lower running costs and improved energy efficiency.\u003c\/p\u003e\n\n\u003cp\u003eWith quiet operation, zero on-site emissions, and flexible installation, EHS Primus electric system boilers are ideal for properties transitioning away from fossil fuels while maintaining consistent and reliable heating performance.\u003c\/p\u003e","products":[{"product_id":"ehs-primus-12000s-12kw-electric-system-boiler","title":"EHS Primus 12000S 12KW Electric System Boiler","description":"\u003cp\u003eThe EHS Primus 12000S is a \u003cstrong\u003e12kW single phase electric system boiler\u003c\/strong\u003e designed to replace a gas system boiler, providing central heating via existing radiators or underfloor heating without altering the pipework.\u003c\/p\u003e\n\u003cp\u003eWhen used with an unvented indirect cylinder, it also delivers mains‑pressure hot water, with the option to heat the store on off‑peak electricity for lower running costs.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12 kW single phase output\u003c\/strong\u003e for small to medium domestic properties using a wet central heating or UFH system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated pump and expansion vessel\u003c\/strong\u003e for a compact, self‑contained system boiler package.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre‑wired chassis\u003c\/strong\u003e to simplify installation and reduce onsite wiring time for installers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo flue or gas supply required\u003c\/strong\u003e, eliminating combustion risks and flue routing constraints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTouch‑screen user interface\u003c\/strong\u003e providing clear temperature and mode control at the boiler.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eHow It Fits Your System\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConnects to existing radiator or underfloor heating circuits in place of a gas system boiler, using the same flow and return pipework.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eDesigned to work with an unvented indirect cylinder to provide domestic hot water for multi‑bathroom homes.\u003cbr\u003e\n\u003c\/li\u003e\n\u003cli\u003eCan be paired with external timers or smart stats to heat the cylinder during cheaper night‑rate or off‑peak periods.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eTechnical Specification\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; height: 391.876px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003ePrimus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003eElectric Heating Supplies (EHS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003ePrimus 12000S Electric System Boiler\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003eElectric system boiler (wet central heating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eNominal Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003e12 kW single phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eSupply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003e230 V AC, single phase\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 39.1875px;\"\u003e\u003cstrong\u003eHeating Application\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 39.1875px;\"\u003eRadiator and underfloor heating systems via sealed primary circuit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eHot Water\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003eRequires separate unvented indirect cylinder (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 39.1875px;\"\u003e\u003cstrong\u003eIntegrated Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 39.1875px;\"\u003eCirculating pump and expansion vessel built into the boiler casing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 39.1875px;\"\u003e\u003cstrong\u003eControls\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 39.1875px;\"\u003eFront‑mounted touch‑screen control panel, compatible with external RF \/ Wi‑Fi stats\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 39.1875px;\"\u003e\u003cstrong\u003eServicing\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 39.1875px;\"\u003eNo mandatory annual service requirement (refer to EHS warranty terms)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003e5 years (subject to manufacturer's T\u0026amp;Cs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003e630 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eWidth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003e380 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 24.7573%; height: 19.5938px;\"\u003e\u003cstrong\u003eDepth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 72.3855%; height: 19.5938px;\"\u003e230 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"EHS","offers":[{"title":"Default Title","offer_id":62994144297309,"sku":"ALS1-1PSY-12","price":1330.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/EHSPrimusElectricSystemBoiler.webp?v=1767108933"},{"product_id":"ehs-primus-14000s-14kw-electric-system-boiler","title":"EHS Primus 14000S 14KW Electric System Boiler","description":"\u003cdiv class=\"product-section\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eEHS Primus 14000S Electric System Boiler\u003c\/strong\u003e is a 14kW single‑phase electric system boiler designed as a direct replacement for a gas system boiler in larger homes with\u003cstrong\u003e wet central heating or underfloor heating systems\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eThe Primus 14000S provides space heating via radiators or underfloor circuits and, when paired with an unvented indirect cylinder, can deliver high volumes of mains‑pressure hot water for multi‑bathroom properties. Running entirely on electricity, it requires no flue or gas supply, making it suitable for properties without gas and for use alongside low‑carbon tariffs or on‑site renewables.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e14kW single‑phase output:\u003c\/strong\u003e Sized for larger homes with higher heat demand and multiple radiators or UFH zones.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect gas boiler replacement:\u003c\/strong\u003e Designed to integrate with existing pipework and radiators, minimising system alterations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated components:\u003c\/strong\u003e Built‑in circulation pump and expansion vessel reduce the need for external system components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo flue or combustion:\u003c\/strong\u003e Zero flue, zero combustion products and no risk of gas or CO leaks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuiet operation:\u003c\/strong\u003e Very low noise thanks to the absence of a burner and limited moving parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow servicing burden:\u003c\/strong\u003e No mandatory annual gas‑safety service; maintenance is simpler than for combustion boilers.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel name:\u003c\/strong\u003e EHS Primus 14000S Electric System Boiler (Primus S range).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNominal output:\u003c\/strong\u003e 14kW electric system boiler.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical supply:\u003c\/strong\u003e 230V, single‑phase, 50Hz (installer to size protective devices and cabling to manufacturer’s guidance).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoiler type:\u003c\/strong\u003e Electric system boiler for space heating, used with a separate indirect cylinder for DHW.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions (H × W × D):\u003c\/strong\u003e 630mm × 380mm × 230mm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e Compact wall‑mounted unit with no flue positioning constraints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 5‑year manufacturer’s warranty (subject to terms and conditions).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eControls \u0026amp; Compatibility\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder compatibility:\u003c\/strong\u003e Suitable for both vented and unvented indirect hot‑water cylinders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eControls:\u003c\/strong\u003e Works with RF or Wi‑Fi programmable thermostats and timers for temperature and time scheduling.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTariff optimisation:\u003c\/strong\u003e Can be programmed to operate against off‑peak or night‑rate tariffs to reduce running costs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"EHS","offers":[{"title":"Default Title","offer_id":62994755289437,"sku":"ALS1‑1PSY‑14","price":1170.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/EHSPrimusElectricSystemBoiler.webp?v=1767108933"},{"product_id":"ehs-combi-boiler-primus-14000c-flex-with-installer-kit","title":"EHS Primus 14000C Flex 14kW Electric Combi Boiler with Installer Kit — Range-Rated Single Phase No Flue Solar PV UFH — ALC1-1PCO-14F","description":"\u003cdiv style=\"font-size:16px;font-family:Arial,Helvetica,sans-serif;color:#1a1a1a;max-width:900px;margin:0 auto;line-height:1.6;\"\u003e\n\n  \u003c!-- ── INTRO ─────────────────────────────────────────────────────── --\u003e\n  \u003cp style=\"margin:0 0 18px;\"\u003e\n    The \u003cstrong\u003eEHS Primus 14000C Flex\u003c\/strong\u003e is a \u003cstrong\u003e14kW single-phase electric combi boiler\u003c\/strong\u003e with a range-rated output — the heating and hot water power levels can be adjusted at installation to match the exact heat loss and hot water requirements of the property, without needing to select a different boiler model. It provides \u003cstrong\u003econtinuous hot water at up to 7 litres per minute\u003c\/strong\u003e and \u003cstrong\u003ecentral heating via existing radiators or underfloor heating\u003c\/strong\u003e, with no flue, no gas connection, and no requirement for an annual Gas Safe safety inspection. The \u003cstrong\u003e\"with installer kit\"\u003c\/strong\u003e bundle includes all the plumbing components needed for a compliant installation — Sentinel magnetic filter, system cleaner and inhibitor, EPH Combi Pack 4 thermostat, WRAS filling loop, automatic bypass valve, isolation valves, and a Caleffi 5 L\/min flow restrictor — along with a \u003cstrong\u003e2-year extended warranty\u003c\/strong\u003e on top of the standard 5-year manufacturer's guarantee. Suitable for small flats, properties off the gas grid, and homes where pipework modifications are to be minimised.\n  \u003c\/p\u003e\n\n  \u003c!-- ── WHAT'S IN THE BOX callout ─────────────────────────────────── --\u003e\n  \u003cdiv style=\"border-left:4px solid #008377CF;background:#e6f4f3;padding:12px 16px;margin-bottom:22px;border-radius:0 6px 6px 0;\"\u003e\n    \u003cstrong style=\"color:#005c54;\"\u003eℹ Installer Kit Contents — All Included\u003c\/strong\u003e\n    \u003cul style=\"margin:10px 0 0;padding-left:20px;line-height:2.1;font-size:15px;\"\u003e\n      \u003cli\u003e\u003cstrong\u003eEHS Primus 14000C Flex 14kW Electric Combi Boiler\u003c\/strong\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003cstrong\u003eSentinel Vortex 250 Magnetic Filter\u003c\/strong\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003cstrong\u003eSentinel X300 System Cleaner\u003c\/strong\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003cstrong\u003eSentinel X100 System Inhibitor\u003c\/strong\u003e\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eEPH Combi Pack 4\u003c\/strong\u003e — wireless RF programmable thermostat \u0026amp; receiver (OpenTherm, Boiler Plus compliant)\u003c\/li\u003e\n      \u003cli\u003e\u003cstrong\u003eWRAS Approved Filling Loop\u003c\/strong\u003e\u003c\/li\u003e\n      \u003cli\u003e\u003cstrong\u003eAutomatic Bypass Valve\u003c\/strong\u003e\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003e4× Isolation Valves\u003c\/strong\u003e — 2× ½\" and 2× ¾\"\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eCaleffi Flow Valve\u003c\/strong\u003e — 5 L\/min flow restrictor for DHW\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \u003cp style=\"margin:10px 0 0;font-size:14px;\"\u003e\u003cstrong\u003ePurchasing with the installer kit adds a 2-year extended warranty\u003c\/strong\u003e on top of the standard 5-year EHS manufacturer's guarantee — 7 years total coverage when the kit is purchased and the boiler is registered.\u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ── RED INSTALLER CALLOUT ─────────────────────────────────────── --\u003e\n  \u003cdiv style=\"border-left:4px solid #c0392b;background:#fff5f5;padding:10px 16px;margin-bottom:22px;border-radius:0 6px 6px 0;\"\u003e\n    \u003cstrong style=\"color:#c0392b;\"\u003e⚠ Qualified Installation Required\u003c\/strong\u003e — Must be installed by a \u003cstrong\u003equalified heating engineer and a Part P registered electrician\u003c\/strong\u003e, in accordance with the EHS installation manual, BS 7671, Building Regulations, and Water Supply (Water Fittings) Regulations 1999. \u003cstrong\u003eAn automatic bypass valve must be fitted\u003c\/strong\u003e — failure to do so can cause F6 error codes or boiler shutdown. Requires a \u003cstrong\u003e63A circuit breaker and 10mm² cable\u003c\/strong\u003e. Mains water pressure must be confirmed; if above 6 bar, a pressure reducing valve is required. An external RCD near the boiler is recommended.\n  \u003c\/div\u003e\n\n  \u003c!-- ── STAT STRIP ─────────────────────────────────────────────────── --\u003e\n  \u003cdiv style=\"display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px;\"\u003e\n    \u003cdiv style=\"flex:1;min-width:90px;background:#008377CF;color:#fff;border-radius:6px;padding:11px 8px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:18px;font-weight:700;\"\u003e14 kW\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:3px;\"\u003eSingle phase 230V\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv style=\"flex:1;min-width:90px;background:#008377CF;color:#fff;border-radius:6px;padding:11px 8px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:18px;font-weight:700;\"\u003e7 L\/min\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:3px;\"\u003eHot water flow\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv style=\"flex:1;min-width:90px;background:#008377CF;color:#fff;border-radius:6px;padding:11px 8px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:18px;font-weight:700;\"\u003eNo flue\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:3px;\"\u003eSite anywhere\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv style=\"flex:1;min-width:90px;background:#008377CF;color:#fff;border-radius:6px;padding:11px 8px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:18px;font-weight:700;\"\u003e~100%\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:3px;\"\u003eEfficient\u003c\/div\u003e\n\u003c\/div\u003e\n    \u003cdiv style=\"flex:1;min-width:90px;background:#008377CF;color:#fff;border-radius:6px;padding:11px 8px;text-align:center;\"\u003e\n\u003cdiv style=\"font-size:18px;font-weight:700;\"\u003e5+2 yr\u003c\/div\u003e\n\u003cdiv style=\"font-size:12px;margin-top:3px;\"\u003eWarranty with kit\u003c\/div\u003e\n\u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003c!-- ── FEATURES ───────────────────────────────────────────────────── --\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;font-weight:600;font-size:15px;padding:10px 16px;border-radius:6px 6px 0 0;\"\u003eFeatures \u0026amp; Benefits\u003c\/div\u003e\n  \u003cdiv style=\"display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:12px;background:#e6f4f3;padding:14px;border-radius:0 0 6px 6px;margin-bottom:22px;\"\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Range-Rated Flex — One Boiler, Any Property\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eThe Primus Flex's defining feature: both \u003cstrong\u003eheating and hot water power outputs are adjustable at installation\u003c\/strong\u003e from 2kW up to the model maximum. The installer sets the boiler output to match the heat loss calculation, rather than selecting a fixed-output model that may be over- or under-sized. For the DHW circuit, EHS recommend not reducing below 12kW if the property has a shower, to ensure adequate temperature rise at the required flow rate. This range-rated approach means a single boiler suits a wide variety of flat and small home types.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ No Flue — No Gas — No Annual Certificate\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eThere are \u003cstrong\u003eno combustion gases, no flue penetration, and no requirement for a Gas Safe annual safety certificate\u003c\/strong\u003e. The boiler can be installed in any interior room — kitchen, hallway, cupboard — without the constraint of a flue route to an external wall. For leasehold flats where gas boiler flue positions are restricted, and for properties in listed buildings or conservation areas, this removes a frequently insurmountable installation barrier. There is no risk of carbon monoxide emission.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Continuous Hot Water — 6.5–7 L\/min\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eAt full 14kW output, the boiler raises incoming cold water temperature by 30°C at \u003cstrong\u003e6.5 litres per minute\u003c\/strong\u003e — sufficient for a standard shower (39°C is a typical shower temperature). The included Caleffi 5 L\/min flow restrictor limits the mains flow to ensure the heat exchanger delivers adequate temperature regardless of incoming mains pressure variation. EHS specify this as a shower-capable boiler for single-bathroom properties; for baths or multi-bathroom homes, a system boiler with a cylinder is recommended.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ COOLFIT Overheat Protection\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003e\n\u003cstrong\u003eCOOLFIT\u003c\/strong\u003e is EHS's active overheat protection system. Rather than relying solely on a passive thermal cut-out, COOLFIT monitors operating temperatures and manages the boiler's power delivery to prevent overheating events before they trigger a safety shutdown. Combined with the standard high-temperature sensor and thermal reset switch within the Flex boiler, this provides layered protection that prolongs component life and reduces nuisance fault conditions.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Touch Screen — Built-in Timer — Whisper Quiet\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eThe \u003cstrong\u003ecolour touch screen display\u003c\/strong\u003e provides intuitive access to operating mode selection (heating \/ hot water \/ both), temperature settings, timer programming, frost protection, and pump purge functions without requiring any external controller for basic operation. A \u003cstrong\u003ebuilt-in 24-hour timer\u003c\/strong\u003e allows heating periods to be set directly on the boiler. Near-silent operation — with minimal moving parts (pump and a 3 bar safety valve) — makes it suitable for installation adjacent to living areas and bedrooms in flats.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Solar PV \u0026amp; Economy Tariff Compatible\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eThe Primus Flex can be \u003cstrong\u003eintegrated with solar PV systems\u003c\/strong\u003e to absorb surplus generated electricity for heating — reducing grid import during generation periods. The built-in timer makes it straightforward to schedule heating to run during cheap-rate periods (Economy 7, Octopus Go, Agile), and the range-rated output allows the boiler to run at a lower output level during self-consumption windows. Compatible with underfloor heating systems at the lower flow temperatures the UFH requires.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Installer Kit — All Components, Extended Warranty\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eThe bundled installer kit provides every major plumbing component required for a compliant installation: \u003cstrong\u003eSentinel magnetic filter, cleaner and inhibitor\u003c\/strong\u003e (system treatment per BS 7593); \u003cstrong\u003eEPH Combi Pack 4\u003c\/strong\u003e (Boiler Plus compliant wireless thermostat with OpenTherm); \u003cstrong\u003eWRAS filling loop\u003c\/strong\u003e; \u003cstrong\u003eautomatic bypass valve\u003c\/strong\u003e (mandatory per EHS specification); \u003cstrong\u003eisolation valves\u003c\/strong\u003e; and \u003cstrong\u003eCaleffi 5 L\/min flow restrictor\u003c\/strong\u003e. Purchasing the boiler with the installer kit extends the standard 5-year warranty by a further 2 years — to 7 years total — when the boiler is registered on the EHS website.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n    \u003cdiv style=\"background:#f0faf9;border:1px solid #c8e6e3;border-radius:6px;padding:13px;\"\u003e\n      \u003cdiv style=\"font-weight:700;color:#008377CF;margin-bottom:5px;\"\u003e✔ Direct Replacement for Gas Combi — No Pipework Changes\u003c\/div\u003e\n      \u003cdiv style=\"font-size:14px;\"\u003eThe Primus Flex connects to existing ¾\" heating flow\/return and ½\" cold\/hot water pipework — \u003cstrong\u003ethe same connection sizes as most domestic gas combi boilers\u003c\/strong\u003e. Existing radiators and pipework do not need to be replaced or modified. The only substantive work is the electrical supply upgrade (63A dedicated circuit) and the removal of the old gas boiler and flue. This makes the Primus Flex one of the most straightforward electric conversions available for flats currently served by a small gas combi.\u003c\/div\u003e\n    \u003c\/div\u003e\n\n  \u003c\/div\u003e\n\n  \u003c!-- ── SPEC TABLE ─────────────────────────────────────────────────── --\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;font-weight:600;font-size:15px;padding:10px 16px;border-radius:6px 6px 0 0;\"\u003eTechnical Specifications\u003c\/div\u003e\n  \u003ctable style=\"width:100%;border-collapse:collapse;margin-bottom:22px;font-size:14px;\"\u003e\n    \u003ctbody\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;width:44%;border-bottom:1px solid #c8e6e3;\"\u003eManufacturer \/ Model\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eEHS Electric Heating Systems — \u003cstrong\u003ePrimus 14000C Flex\u003c\/strong\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003ePart No.\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eALC1-1PCO-14F\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eBoiler Type\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eElectric combi (heating + on-demand DHW)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eMax Output\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e\n\u003cstrong\u003e14 kW\u003c\/strong\u003e (range-rated from 2kW upward)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eSupply\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eSingle phase 230V \/ 50Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eLoad Current\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e61A\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eCircuit Breaker Required\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e\u003cstrong\u003e63A\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eMin Cable Size\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e\u003cstrong\u003e10mm²\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eDHW Flow Rate\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eUp to 7 L\/min (6.5 L\/min at 30°C rise); restrict to 5–6 L\/min for shower\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eHeating Flow Temperature\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e20°C – 80°C (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eMax Mains Water Pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e6 bar (fit PRV if approaching limit)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eMin Mains Water Pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e0.8 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eMax Heating Pressure\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e1.5 bar (3 bar safety blow-off valve fitted)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eInternal Expansion Vessel\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e5 litres\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eIntegral Components\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eERP pump, expansion vessel, 3-bar blow-off valve, paddle flow switch\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eHeating Connections\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e¾\" BSP male thread (flow and return)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eDHW Connections\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e½\" BSP male thread (cold inlet and hot water outlet)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eDisplay\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eColour touch screen with built-in 24-hour timer\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eIP Rating\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eIPX1 (indoor use only — not suitable for bathrooms or shower enclosures)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eWeight\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eUp to 30kg (two-person lift required)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eFlue Required\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#fff;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;border-bottom:1px solid #c8e6e3;\"\u003eManufacturer Warranty\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;border-bottom:1px solid #c8e6e3;\"\u003e\n\u003cstrong\u003e5 years\u003c\/strong\u003e (register at ehs-heating.com)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr style=\"background:#f0faf9;\"\u003e\n\u003ctd style=\"padding:9px 14px;font-weight:600;\"\u003eExtended Warranty (with kit)\u003c\/td\u003e\n\u003ctd style=\"padding:9px 14px;\"\u003e\n\u003cstrong\u003e+ 2 years\u003c\/strong\u003e = 7 years total when purchased with the installer kit\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\n  \u003c!-- ── FAQ ────────────────────────────────────────────────────────── --\u003e\n  \u003cdiv style=\"background:#008377CF;color:#fff;font-weight:600;font-size:15px;padding:10px 16px;border-radius:6px 6px 0 0;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n  \u003cdiv style=\"border:1px solid #c8e6e3;border-top:none;border-radius:0 0 6px 6px;margin-bottom:8px;\"\u003e\n\n    \u003cdetails style=\"border-bottom:1px solid #c8e6e3;\"\u003e\n      \u003csummary style=\"padding:13px 16px;cursor:pointer;font-weight:600;background:#f0faf9;\"\u003eIs 14kW enough to heat my property?\u003c\/summary\u003e\n      \u003cdiv style=\"padding:11px 16px;font-size:14px;\"\u003eThis depends entirely on the heat loss of the property — the size, insulation standard, and number of radiators. EHS recommend completing a heat loss calculation (to BS EN 12831) before ordering. As a rough guide, a well-insulated one or two-bedroom flat up to approximately 70m² is typically suitable for a 14kW electric combi. Because the Flex is range-rated, the installer can set the heating output lower than 14kW if the heat loss calculation indicates this — the boiler will then modulate between 2kW and the set maximum, which can improve efficiency on mild days. EHS offer assistance with heat loss calculations — contact info@ehs-heating.com.\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails style=\"border-bottom:1px solid #c8e6e3;\"\u003e\n      \u003csummary style=\"padding:13px 16px;cursor:pointer;font-weight:600;background:#fff;\"\u003eWhy is a 5 or 6 L\/min flow restrictor needed for the shower?\u003c\/summary\u003e\n      \u003cdiv style=\"padding:11px 16px;font-size:14px;\"\u003eThe heat exchanger in a 14kW electric combi can only add a fixed amount of heat per litre of water that passes through it. At 14kW and 6.5 litres per minute, the temperature rise is approximately 30°C — so if cold water enters at 10°C, hot water leaves at 40°C, which is comfortable for a shower. If mains pressure is high and the flow rate increases to 8 or 9 L\/min without restriction, the same 14kW heats each litre by less — water might only reach 30°C, which is not comfortable for bathing. The Caleffi 5 L\/min flow restrictor in the installer kit caps the flow at a rate the boiler can always satisfy regardless of mains pressure, ensuring consistently hot water every time the shower is run.\u003c\/div\u003e\n    \u003c\/details\u003e\n\n    \u003cdetails\u003e\n      \u003csummary style=\"padding:13px 16px;cursor:pointer;font-weight:600;background:#f0faf9;\"\u003eWhy is the automatic bypass valve mandatory?\u003c\/summary\u003e\n      \u003cdiv style=\"padding:11px 16px;font-size:14px;\"\u003eWhen thermostatic radiator valves (TRVs) close down as rooms reach temperature, the heating circuit becomes increasingly restricted. Without a bypass, the circulation pump forces water against a closed head — pressure rises sharply and flow drops. The EHS Flex boiler has a paddle flow switch that detects inadequate flow and triggers an F6 error code or shuts the boiler down to protect the heat exchanger. The \u003cstrong\u003eautomatic bypass valve\u003c\/strong\u003e prevents this by opening progressively as pressure rises, maintaining minimum flow through the boiler circuit regardless of how many TRVs are closed. This is why EHS specify it as mandatory, not optional. The bypass valve is included in the installer kit.\u003c\/div\u003e\n    \u003c\/details\u003e\n\n  \u003c\/div\u003e\n\n\u003c\/div\u003e","brand":"EHS","offers":[{"title":"Default Title","offer_id":63227551449437,"sku":"ALC1-1PCO-14","price":1350.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/EHSPrimusElectricSystemBoiler.webp?v=1767108933"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/collections\/EHS.png?v=1770635412","url":"https:\/\/qualityheating.co.uk\/collections\/ehs.oembed","provider":"AIZO Quality Heating","version":"1.0","type":"link"}