{"product_id":"baxi-ashp-pre-plumbed-cylinder-170l-210l-250l-300l-stainless-steel-unvented-cylinders-for-air-source-heat-pumps","title":"Baxi ASHP Pre-plumbed Cylinder — 170L \/ 210L \/ 250L \/ 300L Stainless Steel Unvented Cylinders for Air Source Heat Pumps","description":"\u003cdiv style=\"font-size: 16px; font-family: -apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif; color: #222; line-height: 1.55; max-width: 900px; margin: 0 auto;\"\u003e\n\u003cp style=\"margin: 0 0 14px; line-height: 1.6;\"\u003eThe \u003cstrong\u003eBaxi ASHP Pre-plumbed Cylinder\u003c\/strong\u003e is a fully integrated unvented hot water and heating control unit, engineered to work with Baxi's range of air source heat pumps. Available in \u003cstrong\u003e170, 210, 250 and 300 litre capacities\u003c\/strong\u003e, the cylinder arrives \u003cstrong\u003epre-wired, pre-plumbed and pre-fitted\u003c\/strong\u003e with all the components needed to manage heating and domestic hot water — including the \u003cstrong\u003ediverter valve, expansion vessel, pressure controls and integrated controller\u003c\/strong\u003e. Built from \u003cstrong\u003eduplex stainless steel\u003c\/strong\u003e by Megaflo and Heatrae Sadia, with \u003cstrong\u003e60 mm of high-efficiency PU foam insulation\u003c\/strong\u003e and built-in Bluetooth for fast commissioning via the Baxi Start app.\u003c\/p\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 12px; margin: 18px 0 24px;\"\u003e\n\u003cdiv style=\"flex: 1; min-width: 160px; background: #f0faf9; border-left: 4px solid #008377CF; padding: 14px 16px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 24px; font-weight: bold; color: #005c54;\"\u003e76 L\/min\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #444;\"\u003eMax flow at 3 bar\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 160px; background: #f0faf9; border-left: 4px solid #008377CF; padding: 14px 16px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 24px; font-weight: bold; color: #005c54;\"\u003e170–300 L\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #444;\"\u003eFour capacity options\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 160px; background: #f0faf9; border-left: 4px solid #008377CF; padding: 14px 16px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 24px; font-weight: bold; color: #005c54;\"\u003eErP B\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #444;\"\u003e170L \u0026amp; 210L models\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"flex: 1; min-width: 160px; background: #f0faf9; border-left: 4px solid #008377CF; padding: 14px 16px; border-radius: 6px;\"\u003e\n\u003cdiv style=\"font-size: 24px; font-weight: bold; color: #005c54;\"\u003e10 years\u003c\/div\u003e\n\u003cdiv style=\"font-size: 13px; color: #444;\"\u003eInner stainless steel tank*\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #e6f4f3; border-left: 4px solid #008377CF; padding: 16px 20px; border-radius: 6px; margin: 18px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #005c54; margin-bottom: 8px;\"\u003eWhat you get in the box\u003c\/div\u003e\n\u003cdiv style=\"line-height: 1.6;\"\u003eEach unit ships as a \u003cstrong\u003ecomplete cold control pack\u003c\/strong\u003e ready for installation: tundish, \u003cstrong\u003e3.5 bar pressure reducing valve\u003c\/strong\u003e, 6 bar pressure relief valve, \u003cstrong\u003e3-port motorised diverter valve\u003c\/strong\u003e, 24L external expansion vessel, \u003cstrong\u003e13m signal cable\u003c\/strong\u003e, immersion element spanner, compression nuts and olives. The integrated controller, immersion heater and all internal pipework are \u003cstrong\u003efactory-fitted and tested\u003c\/strong\u003e — no field assembly of the heating manifold is required.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; padding: 14px 20px; border-radius: 8px; margin: 32px 0 18px; font-size: 20px; font-weight: bold; letter-spacing: .2px;\"\u003eDesigned for low-labour heat pump installations\u003c\/div\u003e\n\u003cdiv style=\"display: grid; grid-template-columns: repeat(auto-fit,minmax(260px,1fr)); gap: 14px; margin: 18px 0 24px;\"\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 8px; padding: 16px 18px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #005c54; margin-bottom: 6px;\"\u003eDuplex stainless steel build\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.55;\"\u003eInner vessel manufactured by \u003cstrong\u003eMegaflo and Heatrae Sadia\u003c\/strong\u003e from corrosion-resistant duplex stainless steel and \u003cstrong\u003e100% pressure tested to 16 bar\u003c\/strong\u003e. The outer casing uses pre-coated steel with polypropylene mouldings for long service life.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 8px; padding: 16px 18px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #005c54; margin-bottom: 6px;\"\u003ePre-plumbed and pre-wired\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.55;\"\u003eAll controls, the \u003cstrong\u003ediverter valve, immersion heater, expansion vessel and safety valves\u003c\/strong\u003e are factory-fitted. Pipe connections take 22mm compression fittings or \u003cstrong\u003e3\/4\" BSP\u003c\/strong\u003e threaded fittings — cutting site labour and commissioning time.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 8px; padding: 16px 18px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #005c54; margin-bottom: 6px;\"\u003eBluetooth + Baxi Start App\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.55;\"\u003eBuilt-in Bluetooth lets the installer commission, configure and service the cylinder from a phone using the \u003cstrong\u003eBaxi Start app\u003c\/strong\u003e. Bluetooth can be deactivated once setup is complete to keep the unit secure.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 8px; padding: 16px 18px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #005c54; margin-bottom: 6px;\"\u003eIntegrated 2-zone controller\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.55;\"\u003eThe on-board controller drives the \u003cstrong\u003eheat pump, DHW priority, immersion backup and automatic Legionella cycle\u003c\/strong\u003e. Heating output supports \u003cstrong\u003eup to two zones\u003c\/strong\u003e when paired with the optional Baxi 7879380 second zone kit.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 8px; padding: 16px 18px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #005c54; margin-bottom: 6px;\"\u003eHigh-efficiency PU insulation\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.55;\"\u003e\n\u003cstrong\u003e60mm of CFC\/HCFC-free fire-retardant PU foam\u003c\/strong\u003e with zero ozone depletion potential keeps standing losses low — from \u003cstrong\u003e1.38 kWh\/24h on the 170L\u003c\/strong\u003e up to 2.02 kWh\/24h on the 300L.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #f0faf9; border: 1px solid #c8e6e3; border-radius: 8px; padding: 16px 18px;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #005c54; margin-bottom: 6px;\"\u003eDesigned for Baxi ASHPs\u003c\/div\u003e\n\u003cdiv style=\"font-size: 14px; line-height: 1.55;\"\u003eOptimised to work with the \u003cstrong\u003eBaxi HP40, HP50, HP55 and HP60\u003c\/strong\u003e monobloc heat pumps. A 3kW immersion provides backup heating and runs the Legionella cycle when needed.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; padding: 14px 20px; border-radius: 8px; margin: 32px 0 18px; font-size: 20px; font-weight: bold; letter-spacing: .2px;\"\u003eAir source heat pump compatibility\u003c\/div\u003e\n\u003cp style=\"margin: 0 0 14px; line-height: 1.6;\"\u003eThe pre-plumbed cylinder is the \u003cstrong\u003erecommended hot water and control package\u003c\/strong\u003e for the Baxi air source heat pump range — compatible with the \u003cstrong\u003eHP40 standard-temperature monobloc\u003c\/strong\u003e, the \u003cstrong\u003eBaxi Assure HP50\u003c\/strong\u003e, the \u003cstrong\u003eHP55 high-temperature monobloc\u003c\/strong\u003e and the \u003cstrong\u003eHP60 high-temperature monobloc\u003c\/strong\u003e. The integrated controller takes the heat pump's flow temperature signal, modulates the diverter valve between heating and DHW, and falls back to the \u003cstrong\u003e3 kW immersion\u003c\/strong\u003e for backup or the Legionella cycle. Pair with the Baxi \u003cstrong\u003euSense 2 smart room thermostat\u003c\/strong\u003e via OpenTherm for weather compensation and remote control through the MyBaxi app.\u003c\/p\u003e\n\u003cdiv style=\"overflow-x: auto; margin: 8px 0 18px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background: #008377CF; color: #ffffff;\"\u003e\n\u003cth style=\"padding: 10px 12px; text-align: left; border: 1px solid #005c54;\"\u003eSpecification\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: left; border: 1px solid #005c54;\"\u003e170L\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: left; border: 1px solid #005c54;\"\u003e210L\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: left; border: 1px solid #005c54;\"\u003e250L\u003c\/th\u003e\n\u003cth style=\"padding: 10px 12px; text-align: left; border: 1px solid #005c54;\"\u003e300L\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eProduct code\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e7853985\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e7853986\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e7853987\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e7853988\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eNominal capacity\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e170 L\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e210 L\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e250 L\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e300 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eStorage volume @ 3 bar\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e167 L\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e209 L\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e246 L\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e287 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eHot water at \u0026gt;40 °C\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e239 L\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e293 L\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e333 L\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e417 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eCoil heat-up time\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e18.7 min\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e21.8 min\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e23 min\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e27.5 min\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eCoil surface area\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e2 m²\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e2 m²\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e3 m²\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e3 m²\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eCoil rating\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e31.3 kW\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e32.5 kW\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e37 kW\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e37.9 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eStanding heat loss\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e1.38 kWh\/24h\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e1.64 kWh\/24h\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e1.86 kWh\/24h\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e2.02 kWh\/24h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eEnergy efficiency class\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003eB\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003eB\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003eC\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003eC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eHeight\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e1280 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e1516 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e1767 mm\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e2082 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eWeight (empty)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e61 kg\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e68 kg\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e74 kg\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e83 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eWeight (full)\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e228 kg\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e277 kg\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e320 kg\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8;\"\u003e370 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"color: #005c54; font-size: 17px; font-weight: bold; margin: 18px 0 10px;\"\u003eCommon specifications (all capacities)\u003c\/div\u003e\n\u003cdiv style=\"overflow-x: auto; margin: 8px 0 18px;\"\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 14px;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600; width: 45%;\"\u003eWidth \/ diameter\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; background: #f0faf9;\"\u003e699 mm \/ 579 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eInsulation thickness\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; background: #fff;\"\u003e60 mm CFC\/HCFC-free PU foam\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eImmersion element rating\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; background: #f0faf9;\"\u003e3 kW @ 240 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eMax flow rate\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; background: #fff;\"\u003e76 L\/min @ 3 bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003ePressure reducing valve \/ relief \/ T\u0026amp;P\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; background: #f0faf9;\"\u003e3.5 bar \/ 6 bar \/ 10 bar \u0026amp; 90 °C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eExternal expansion vessel\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; background: #fff;\"\u003e24 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eConnections\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; background: #f0faf9;\"\u003e28 mm flow \u0026amp; return · 22 mm cold inlet · 22 mm DHW outlet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background: #f0faf9;\"\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eInner vessel\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; background: #fff;\"\u003eDuplex stainless steel — 100% tested to 1.6 MPa (16 bar)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; font-weight: 600;\"\u003eWarranty*\u003c\/td\u003e\n\u003ctd style=\"padding: 9px 12px; border: 1px solid #d4eae8; background: #f0faf9;\"\u003e2-year parts and labour, 10-year inner stainless steel tank\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"font-size: 12px; color: #666; margin-top: -6px; margin-bottom: 14px;\"\u003e*Warranty subject to terms — see baxi.co.uk\/terms. ErP class per EU regulations 814\/2013 and 812\/2013. Coil heat-up times measured at 15 L\/min; cylinder tested per Annex A, BS EN 12897:2016.\u003c\/div\u003e\n\u003cdiv style=\"background: #fef2f2; border-left: 4px solid #dc2626; padding: 14px 18px; border-radius: 6px; margin: 18px 0;\"\u003e\n\u003cdiv style=\"font-weight: bold; color: #7f1d1d; margin-bottom: 6px;\"\u003eInstallation requirements\u003c\/div\u003e\n\u003cdiv style=\"line-height: 1.6; font-size: 14px;\"\u003eInstallation, commissioning and annual servicing must be carried out by a \u003cstrong\u003ecompetent person\u003c\/strong\u003e — typically G3 unvented hot water qualified and Gas Safe \/ MCS registered as appropriate. The unit must be installed in accordance with \u003cstrong\u003eBuilding Regulations Part G\u003c\/strong\u003e, BS EN 12897:2016 and the Baxi Installation \u0026amp; Service Manual. Do not bypass any safety valve or thermal cut-out. A 22mm cold water supply (15mm acceptable subject to flow) and a discharge route from tundish to a safe, visible point are required.\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"background: #008377CF; color: #ffffff; padding: 14px 20px; border-radius: 8px; margin: 32px 0 18px; font-size: 20px; font-weight: bold; letter-spacing: .2px;\"\u003eFrequently asked questions\u003c\/div\u003e\n\u003cdetails style=\"margin: 8px 0; border: 1px solid #c8e6e3; border-radius: 6px; 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 Baxi pre-plumbed cylinder and the standard ASHP cylinder?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px; line-height: 1.6; background: #fff;\"\u003eThe pre-plumbed cylinder arrives \u003cstrong\u003efully assembled\u003c\/strong\u003e with the diverter valve, immersion heater, expansion vessel, integrated controller, pressure controls and all internal pipework factory-fitted. The standard Baxi ASHP cylinder is the cylinder vessel only and requires the installer to assemble the heating manifold and controls separately. Choose pre-plumbed for the fastest, lowest-labour installation; choose the standard cylinder if you need flexibility to design a bespoke control scheme.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin: 8px 0; border: 1px solid #c8e6e3; border-radius: 6px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; cursor: pointer; font-weight: 600; list-style: none;\"\u003eWhich Baxi heat pumps is this cylinder compatible with?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px; line-height: 1.6; background: #fff;\"\u003eThe pre-plumbed cylinder is engineered for the full Baxi air source heat pump range — the \u003cstrong\u003eHP40 monobloc, the Baxi Assure HP50, the HP55 high-temperature monobloc and the HP60 high-temperature monobloc\u003c\/strong\u003e. The integrated controller is configured during commissioning via the Baxi Start app to match the connected heat pump model.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin: 8px 0; border: 1px solid #c8e6e3; border-radius: 6px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; cursor: pointer; font-weight: 600; list-style: none;\"\u003eCan the cylinder support two heating zones?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px; line-height: 1.6; background: #fff;\"\u003eYes — the integrated controller is designed to manage \u003cstrong\u003eup to two heating zones plus DHW priority\u003c\/strong\u003e. A second zone requires the optional Baxi \u003cstrong\u003esecond zone kit (part 7879380)\u003c\/strong\u003e, available as a separate accessory, which adds the additional zone valve, sensors and wiring needed for independent control.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin: 8px 0; border: 1px solid #c8e6e3; border-radius: 6px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; cursor: pointer; font-weight: 600; list-style: none;\"\u003eHow is Legionella protection handled?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px; line-height: 1.6; background: #fff;\"\u003eThe integrated controller runs an \u003cstrong\u003eautomatic Legionella cycle\u003c\/strong\u003e that uses the 3kW immersion heater to raise the cylinder contents to a temperature high enough to neutralise legionella bacteria, even if the heat pump is in low-temperature operation. Frequency and target temperature are set during commissioning in line with BS 8580.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin: 8px 0; border: 1px solid #c8e6e3; border-radius: 6px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; cursor: pointer; font-weight: 600; list-style: none;\"\u003eWhat size cylinder do I need?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px; line-height: 1.6; background: #fff;\"\u003eAs a guide: the \u003cstrong\u003e170L\u003c\/strong\u003e suits a 1–2 bedroom property with a single bathroom; the \u003cstrong\u003e210L\u003c\/strong\u003e matches a typical 3-bed home with one bathroom; the \u003cstrong\u003e250L\u003c\/strong\u003e is a strong fit for a 3–4 bed property with two bathrooms; and the \u003cstrong\u003e300L\u003c\/strong\u003e is appropriate for a 4-bed home with two or more bathrooms. Final selection should be confirmed by a property heat-loss calculation and a hot water demand assessment (number of occupants, simultaneous draws, bath versus shower use).\u003c\/div\u003e\n\u003c\/details\u003e\n\u003cdetails style=\"margin: 8px 0; border: 1px solid #c8e6e3; border-radius: 6px; overflow: hidden;\"\u003e\n\u003csummary style=\"background: #008377CF; color: #fff; padding: 12px 16px; cursor: pointer; font-weight: 600; list-style: none;\"\u003eDoes the Boiler Upgrade Scheme apply?\u003c\/summary\u003e\n\u003cdiv style=\"padding: 14px 18px; line-height: 1.6; background: #fff;\"\u003eThe Boiler Upgrade Scheme grant is paid against the \u003cstrong\u003eheat pump installation\u003c\/strong\u003e (Baxi HP40 \/ HP60), not the cylinder itself. The cylinder is, however, a normal part of an MCS-certified ASHP system, so its cost forms part of the installed package that qualifies for the grant. Always check current eligibility, grant value and scheme rules with your MCS-certified installer.\u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/div\u003e","brand":"Baxi","offers":[{"title":"170L","offer_id":64573823320413,"sku":"7853985","price":2995.0,"currency_code":"GBP","in_stock":true},{"title":"210L","offer_id":64573823353181,"sku":"7853986","price":3100.0,"currency_code":"GBP","in_stock":true},{"title":"250L","offer_id":64573823385949,"sku":"7853987","price":3300.0,"currency_code":"GBP","in_stock":true},{"title":"300L","offer_id":64573823418717,"sku":"7853988","price":3600.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0958\/2051\/3629\/files\/BaxiASHPPre-plumbedCylinderStainlessSteelUnventedCylindersforAirSourceHeatPumps.webp?v=1777618550","url":"https:\/\/qualityheating.co.uk\/products\/baxi-ashp-pre-plumbed-cylinder-170l-210l-250l-300l-stainless-steel-unvented-cylinders-for-air-source-heat-pumps","provider":"AIZO Quality Heating","version":"1.0","type":"link"}