{"product_id":"oso-delta-geocoil-dgc250l-250-litre-heat-pump-unvented-cylinder","title":"OSO Delta GeoCoil DGC250L 250 Litre Heat Pump Unvented Cylinder","description":"\u003cdiv style=\"font-size: 16px; max-width: 900px; margin: 0 auto; font-family: Arial, Helvetica, sans-serif; color: #333; line-height: 1.7;\"\u003e\n\u003cp style=\"font-size: 16px; line-height: 1.8; color: #333;\"\u003eThe \u003cb\u003eOSO Delta GeoCoil DGC250L\u003c\/b\u003e is a \u003cb\u003e250 litre indirect unvented heat pump cylinder\u003c\/b\u003e engineered for \u003cb\u003emaximum energy efficiency\u003c\/b\u003e in renewable heating systems. Built from \u003cb\u003eEVERLAST™ titanium-alloyed stainless steel\u003c\/b\u003e and insulated with OSO's award-winning combination of \u003cb\u003eNANOPUR foam\u003c\/b\u003e and \u003cb\u003eVacuum Insulation Panels (VIP)\u003c\/b\u003e, the DGC250L achieves an \u003cb\u003eErP A energy rating\u003c\/b\u003e — making it one of the most efficient heat pump cylinders available in the UK market. The large \u003cb\u003e2.6 m² smooth scale-resistant coil\u003c\/b\u003e is optimised for heat pumps up to \u003cb\u003e15 kW\u003c\/b\u003e, while the built-in \u003cb\u003e2.8 kW INCOTEC™ immersion heater\u003c\/b\u003e provides backup boosting capability. Compatible with both \u003cb\u003eS-plan and Y-plan systems\u003c\/b\u003e, the DGC250L includes a \u003cb\u003edigital dual cylinder thermostat\u003c\/b\u003e with \u003cb\u003eanti-legionella\u003c\/b\u003e and \u003cb\u003eholiday mode\u003c\/b\u003e functions as standard, and is backed by OSO's \u003cb\u003e25-year warranty\u003c\/b\u003e on the stainless steel tank.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0;\"\u003e\n\u003cdiv style=\"flex: 1 1 140px; background: #008377CF; color: #fff; border-radius: 10px; padding: 16px 10px; text-align: center; min-width: 130px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003e250 L\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.92;\"\u003eNominal Capacity\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 140px; background: #008377CF; color: #fff; border-radius: 10px; padding: 16px 10px; text-align: center; min-width: 130px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003eA\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.92;\"\u003eErP Energy Rating\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 140px; background: #008377CF; color: #fff; border-radius: 10px; padding: 16px 10px; text-align: center; min-width: 130px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003e2.6 m²\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.92;\"\u003ePrimary Coil Area\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 140px; background: #008377CF; color: #fff; border-radius: 10px; padding: 16px 10px; text-align: center; min-width: 130px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003e2.8 kW\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.92;\"\u003eImmersion Heater\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 140px; background: #008377CF; color: #fff; border-radius: 10px; padding: 16px 10px; text-align: center; min-width: 130px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003e25 Years\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.92;\"\u003eTank Warranty\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 140px; background: #008377CF; color: #fff; border-radius: 10px; padding: 16px 10px; text-align: center; min-width: 130px;\"\u003e\n\u003cdiv style=\"font-size: 22px; font-weight: bold;\"\u003e≤15 kW\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; margin-top: 4px; opacity: 0.92;\"\u003eHeat Pump Capacity\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 5px solid #D32F2F; background: #FFF3F3; padding: 14px 16px; border-radius: 0 8px 8px 0; margin: 14px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #d32f2f; margin-bottom: 4px;\"\u003e🔴 Building Regulation G3 – Unvented Cylinder Installation\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #333; line-height: 1.6;\"\u003eThis unvented hot water cylinder must be installed by a \u003cb\u003ecompetent person\u003c\/b\u003e holding a current \u003cb\u003eG3 unvented hot water storage qualification\u003c\/b\u003e, in full compliance with Building Regulation G3, EN 12897:2016, and all current legislation in force at the date of installation. The discharge pipework must be routed to a safe, visible position with continuous fall to drain.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 5px solid #008377CF; background: #E6F4F2; padding: 14px 16px; border-radius: 0 8px 8px 0; margin: 14px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 4px;\"\u003e🟢 Vacuum Insulation Panel (VIP) Technology\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #333; line-height: 1.6;\"\u003eOSO's proprietary \u003cb\u003eVacuum Insulation Panels\u003c\/b\u003e work alongside \u003cb\u003eNANOPUR high-performance foam\u003c\/b\u003e to deliver class-leading thermal retention. OSO states that the VIP + NANOPUR combination can reduce heat loss by approximately \u003cb\u003e400 kWh per year\u003c\/b\u003e compared to conventional insulation, helping housebuilders meet stringent \u003cb\u003eSAP energy requirements\u003c\/b\u003e and potentially saving enough energy to pay for the cylinder over its lifetime.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-left: 5px solid #008377CF; background: #E6F4F2; padding: 14px 16px; border-radius: 0 8px 8px 0; margin: 14px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 4px;\"\u003e🟢 EVERLAST™ Corrosion Protection\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #333; line-height: 1.6;\"\u003eThe DGC250L tank is manufactured from \u003cb\u003eEVERLAST™ titanium-alloyed stainless steel\u003c\/b\u003e using OSO's \u003cb\u003eULTRAWELD™\u003c\/b\u003e welding system and advanced passivation process for class-leading corrosion resistance. OSO stainless steel cylinders are over \u003cb\u003e40% lighter\u003c\/b\u003e than equivalent enamelled products, and the \u003cb\u003eINCOTEC™\u003c\/b\u003e immersion heater uses ultra-high-grade \u003cb\u003eIncoloy 825\u003c\/b\u003e stainless elements with \u003cb\u003eDZR brass\u003c\/b\u003e and zinc-free soldering for maximum durability in hard water areas.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; color: #008377cf; margin: 28px 0 12px; padding-bottom: 6px; border-bottom: 3px solid #008377CF;\"\u003eKey Features\u003c\/div\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 14px; margin: 22px 0;\"\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #f7f7f7; border-radius: 10px; padding: 18px 16px; border-top: 4px solid #008377CF;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px; font-size: 15px;\"\u003eHeat Pump Optimised Coil Design\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444; line-height: 1.6;\"\u003eThe \u003cb\u003e2.6 m² smooth tube heat exchanger\u003c\/b\u003e is specifically engineered for low-temperature renewable heat sources. Its large surface area ensures efficient heat transfer even at the lower flow temperatures typical of \u003cb\u003eair source and ground source heat pumps up to 15 kW\u003c\/b\u003e, maximising system COP and reducing reheat times.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #f7f7f7; border-radius: 10px; padding: 18px 16px; border-top: 4px solid #008377CF;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px; font-size: 15px;\"\u003eAward-Winning VIP + NANOPUR Insulation\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444; line-height: 1.6;\"\u003eThe dual-layer insulation system combines \u003cb\u003eVacuum Insulation Panels\u003c\/b\u003e with \u003cb\u003eNANOPUR high-performance foam\u003c\/b\u003e to achieve the lowest standing losses in the heat pump cylinder market. This \u003cb\u003eErP A-rated\u003c\/b\u003e thermal performance helps meet Part L building regulations and contributes to superior \u003cb\u003eSAP scores\u003c\/b\u003e for new-build projects.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #f7f7f7; border-radius: 10px; padding: 18px 16px; border-top: 4px solid #008377CF;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px; font-size: 15px;\"\u003eINCOTEC™ Immersion Backup\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444; line-height: 1.6;\"\u003eThe factory-fitted \u003cb\u003e2.8 kW INCOTEC™ immersion heater\u003c\/b\u003e positioned above the coil acts as an emergency backup or boost element. Using \u003cb\u003eIncoloy 825 stainless steel\u003c\/b\u003e with carefully calculated surface loads, it resists scale build-up in hard water regions and raises the upper portion of stored water to full temperature quickly when needed.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #f7f7f7; border-radius: 10px; padding: 18px 16px; border-top: 4px solid #008377CF;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px; font-size: 15px;\"\u003eDigital Dual Thermostat with Legionella Protection\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444; line-height: 1.6;\"\u003eThe \u003cb\u003eelectronic dual cylinder thermostat\u003c\/b\u003e provides precise temperature control with a clear LCD display. The built-in \u003cb\u003eanti-legionella function\u003c\/b\u003e delivers an automatic weekly boost to above 60°C, adjustable from 1 to 7 days or fully disabled. \u003cb\u003eHoliday mode\u003c\/b\u003e shuts down all heating during extended vacancy to save energy.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #f7f7f7; border-radius: 10px; padding: 18px 16px; border-top: 4px solid #008377CF;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px; font-size: 15px;\"\u003eComplete G3-Compliant Kit Included\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444; line-height: 1.6;\"\u003eThe DGC250L ships with a full \u003cb\u003eG3 accessory kit\u003c\/b\u003e including multibloc valve (with line strainer, PRV, expansion relief, and balanced cold take-off), tundish, drain cock, \u003cb\u003eHoneywell V4043H motorised valve\u003c\/b\u003e, and a \u003cb\u003e24 litre expansion vessel\u003c\/b\u003e — reducing the need for additional site-sourced components and simplifying installation.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1 1 260px; background: #f7f7f7; border-radius: 10px; padding: 18px 16px; border-top: 4px solid #008377CF;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #008377cf; margin-bottom: 6px; font-size: 15px;\"\u003eEVERLAST™ 25-Year Tank Warranty\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; color: #444; line-height: 1.6;\"\u003eThe \u003cb\u003etitanium-alloyed stainless steel\u003c\/b\u003e tank with \u003cb\u003eULTRAWELD™\u003c\/b\u003e welded construction and advanced passivation delivers exceptional corrosion resistance. OSO backs this with a \u003cb\u003e25-year warranty\u003c\/b\u003e on the stainless steel vessel — among the longest in the UK cylinder market — reflecting confidence in their Norwegian manufacturing quality (ISO 9001 \/ ISO 14001 certified).\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; color: #008377cf; margin: 28px 0 12px; padding-bottom: 6px; border-bottom: 3px solid #008377CF;\"\u003eTechnical Specifications\u003c\/div\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; margin: 22px 0; border-radius: 8px; overflow: hidden; border: 1px solid #ddd;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 14px; font-size: 14px; border-radius: 4px;\" colspan=\"2\"\u003eProduct Identification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eManufacturer\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eOSO Hotwater AS (Norway)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eProduct Name\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eDelta GeoCoil DGC250L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eMPN\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e11009122\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eInternational Product Code\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eDGC 250 – 2.8 kW \/ 1×230V + HX 2.6 m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eEAN \/ Barcode\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eNot publicly listed — contact OSO UK\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 14px; font-size: 14px; border-radius: 4px;\" colspan=\"2\"\u003eCapacity \u0026amp; Dimensions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eNominal Capacity\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e250 litres\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eActual Volume\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e~245 litres\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eDiameter (ø)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e595 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eHeight (H)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e1535 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eWeight (Empty)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e~60 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eAdjustable Feet Range\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e0 – 40 mm (factory fitted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 14px; font-size: 14px; border-radius: 4px;\" colspan=\"2\"\u003eThermal Performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eErP Energy Rating\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eInsulation Type\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eNANOPUR foam + Vacuum Insulation Panels (VIP)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eStanding Heat Loss (EN 12897)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eNot separately published for UK VIP 250L — see amber callout above\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eEnergy Saving vs Conventional\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e~400 kWh\/year (OSO stated, VIP + NANOPUR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eThermostat Set Point (Factory)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e60°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 14px; font-size: 14px; border-radius: 4px;\" colspan=\"2\"\u003ePrimary Heating (Coil)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003ePrimary Coil Surface Area\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e2.6 m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eCoil Type\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eSmooth, scale-resistant tube heat exchanger\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eCompatible Heat Pump Output\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eUp to 15 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003ePrimary Flow Direction\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eBottom to top\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003ePrimary Connections\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e3\/4\" BSP female (flow \u0026amp; return)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eMax Primary Flow Temperature\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e82°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 14px; font-size: 14px; border-radius: 4px;\" colspan=\"2\"\u003eImmersion Heater\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eImmersion Power\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e2.8 kW (1-phase, 230 V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eElement Type\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eINCOTEC™ (Incoloy 825, scale-resistant)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eImmersion Thermostat Range\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eAdjustable 18 – 70°C (preset 60°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eSafety Cut-Out\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e85°C (manual reset)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 14px; font-size: 14px; border-radius: 4px;\" colspan=\"2\"\u003ePressure \u0026amp; Water Supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eMax Operating Pressure\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e10 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eMinimum Supply Pressure\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e2.5 bar (recommended)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eRecommended Flow Rate\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e20 litres\/min at 1 bar dynamic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eT\u0026amp;P Relief Valve\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e10 bar \/ 90 – 95°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eExpansion Vessel\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e24 litre (3 bar pre-charge, included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 14px; font-size: 14px; border-radius: 4px;\" colspan=\"2\"\u003eControls \u0026amp; Safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eCylinder Thermostat\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eElectronic dual cylinder thermostat (25 – 65°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eLimit Thermostat\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e80°C (concealed manual reset)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eAnti-Legionella Function\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eWeekly auto-boost to \u0026gt;60°C (adjustable 1 – 7 days)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eHoliday Mode\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eYes — full shutdown for extended vacancy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eMotorised Valve\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eHoneywell V4043H1056C (2-port, included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eS-plan and Y-plan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background: #008377CF; color: #fff; font-weight: bold; padding: 10px 14px; font-size: 14px; border-radius: 4px;\" colspan=\"2\"\u003eConstruction \u0026amp; Compliance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eTank Material\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eEVERLAST™ titanium-alloyed stainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eWelding System\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eULTRAWELD™\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eIP Rating\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eIP21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003ePressure Vessel Standard\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eEN 12897:2016\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eSafety Standard\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eEN 60335-2-21\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eCertification\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eUKCA marked\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eDirectives\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eLVD 2014\/35\/EU, EMC 2014\/30\/EU, PED 2014\/68\/EU\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #ffffff;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eTank Warranty\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003e25 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee; width: 50%;\"\u003eCountry of Manufacture\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 14px; font-size: 14px; color: #333; border-bottom: 1px solid #eee;\"\u003eNorway\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cdiv style=\"font-size: 20px; font-weight: bold; color: #008377cf; margin: 28px 0 12px; padding-bottom: 6px; border-bottom: 3px solid #008377CF;\"\u003eFrequently Asked Questions\u003c\/div\u003e\n\u003cdiv style=\"margin: 22px 0;\"\u003e\n\u003cdetails style=\"margin-bottom: 8px; border: 1px solid #ddd; border-radius: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; font-size: 15px; cursor: pointer;\"\u003eWhat types of heat pump is the DGC250L compatible with?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14px; color: #333; line-height: 1.7;\"\u003eThe OSO Delta GeoCoil DGC250L is compatible with all thermostatically controlled \u003cb\u003eair source heat pumps (ASHP)\u003c\/b\u003e and \u003cb\u003eground source heat pumps (GSHP)\u003c\/b\u003e with an output of up to \u003cb\u003e15 kW\u003c\/b\u003e. The large 2.6 m² coil is specifically designed for efficient heat transfer at the lower flow temperatures typical of heat pump systems. The cylinder can also be connected to gas or oil boilers for faster reheat times if required.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 8px; border: 1px solid #ddd; border-radius: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; font-size: 15px; cursor: pointer;\"\u003eWho can install this cylinder?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14px; color: #333; line-height: 1.7;\"\u003eAs an unvented hot water storage system, the DGC250L must be installed by a \u003cb\u003ecompetent person\u003c\/b\u003e who holds a current qualification in unvented hot water systems (Building Regulation G3). The installation must comply with all current building regulations, water regulations, and IEE wiring regulations. OSO cylinders are not suitable for gravity-fed primary systems or non-thermostatically controlled heat sources such as solid fuel stoves.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 8px; border: 1px solid #ddd; border-radius: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; font-size: 15px; cursor: pointer;\"\u003eWhat is included in the box?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14px; color: #333; line-height: 1.7;\"\u003eThe DGC250L is supplied with a comprehensive accessory kit including: a \u003cb\u003emultibloc valve\u003c\/b\u003e (incorporating pressure reducing valve, line strainer, balanced cold take-off, check valve, and expansion relief valve), \u003cb\u003etundish\u003c\/b\u003e, \u003cb\u003e3\/4\" × 22 mm elbow\/drain cock\u003c\/b\u003e, \u003cb\u003eHoneywell V4043H motorised valve\u003c\/b\u003e, \u003cb\u003e24 litre expansion vessel\u003c\/b\u003e, and the installation manual with log book. The immersion heater, thermostats, T\u0026amp;P relief valve, and adjustable feet are factory fitted.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 8px; border: 1px solid #ddd; border-radius: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; font-size: 15px; cursor: pointer;\"\u003eHow does the anti-legionella function work?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14px; color: #333; line-height: 1.7;\"\u003eThe digital dual cylinder thermostat includes an automatic \u003cb\u003eweekly legionella boost\u003c\/b\u003e that raises the stored water temperature to above 60°C for one hour, killing any legionella bacteria. The interval can be adjusted from 1 to 7 days, or fully disabled during commissioning. OSO recommends keeping the cylinder thermostat set at \u003cb\u003e60°C\u003c\/b\u003e in line with government guidelines to maintain adequate protection against bacterial growth.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 8px; border: 1px solid #ddd; border-radius: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; font-size: 15px; cursor: pointer;\"\u003eWhat makes the VIP insulation different from standard cylinder insulation?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14px; color: #333; line-height: 1.7;\"\u003eOSO's \u003cb\u003eVacuum Insulation Panels (VIP)\u003c\/b\u003e use evacuated panels that dramatically reduce conductive and convective heat transfer compared to standard foam or fibre insulation. Combined with \u003cb\u003eNANOPUR high-performance foam\u003c\/b\u003e, the system delivers approximately \u003cb\u003e400 kWh per year\u003c\/b\u003e less heat loss than conventionally insulated cylinders. This achieves an \u003cb\u003eErP A rating\u003c\/b\u003e, helps meet SAP targets for new-build projects, and can save enough on running costs to recoup the cylinder cost over its lifetime.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin-bottom: 8px; border: 1px solid #ddd; border-radius: 8px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; font-weight: 600; font-size: 15px; cursor: pointer;\"\u003eCan I use this cylinder with a gas or oil boiler instead of a heat pump?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 16px; font-size: 14px; color: #333; line-height: 1.7;\"\u003eYes. While the DGC250L is optimised for heat pump installations, the 2.6 m² coil can also be heated by a \u003cb\u003ethermostatically controlled gas or oil boiler\u003c\/b\u003e, which will deliver faster reheat times than a heat pump. The cylinder supports both \u003cb\u003eS-plan and Y-plan\u003c\/b\u003e system configurations. Note that non-thermostatically controlled heat sources (such as solid fuel or wood-burning stoves) must not be used with this unvented cylinder.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"OSO Hotwater","offers":[{"title":"Default Title","offer_id":65270562980189,"sku":"11009122","price":2100.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/OsoDeltaGeoCoilDGCHeatPumpCylinder.jpg?v=1764833152","url":"https:\/\/qualityheating.co.uk\/products\/oso-delta-geocoil-dgc250l-250-litre-heat-pump-unvented-cylinder","provider":"AIZO Quality Heating","version":"1.0","type":"link"}