Mixergy Cube X 210L Smart Thermal Store
The Mixergy Cube X 210L Smart Thermal Store is a G3-exempt, app-connected hot water cylinder engineered specifically for retrofit projects where space is tight and traditional unvented systems are impractical. Unlike conventional cylinders that heat the entire tank, the Cube X uses Mixergy's patented top-down heating technology — only warming the water you actually need, slashing energy bills and recovery times in the process. Recognised in RdSAP and designed to elevate EPC ratings, it is the smart cylinder of choice for housing providers, retrofit teams, and eco-conscious homeowners alike.
The Cube X is a thermal store, not an unvented pressure cylinder. No discharge pipework is required, no G3 annual certification is needed, and no Unvented (G3) qualified engineer is mandatory for installation — dramatically cutting project costs and compliance overhead.
Hot water accumulates from the top of the tank downwards, so even a partially heated cylinder delivers usable hot water almost immediately. This means less energy wasted heating water that won't be used.
Control the cylinder remotely via the Mixergy iOS and Android app. Set schedules, monitor energy use, boost hot water on demand, and receive insights — all from your phone.
At just 520mm wide × 585mm deep × 1,650mm tall (inc. fittings), the Cube X fits into tight airing cupboards and retrofit spaces where a traditional cylinder would not.
The Mixergy IO platform uses machine learning to predict hot water demand and optimise heating schedules automatically, reducing energy consumption without sacrificing comfort.
Integrates with time-of-use electricity tariffs (e.g. Octopus Agile) to heat water during cheapest periods. Solar PV diverter capability available — heat water from your own roof.
Housing providers gain remote visibility of all cylinders via the IO dashboard — monitoring temperatures, energy performance, and predictive maintenance alerts across their entire stock.
A built-in gauge on the side of the unit shows hot water level at a glance, with a simple power button to switch on or off — ideal for tenants unfamiliar with smart technology.
An integrated thermostatic mixing valve (TMV) blends the stored water to a safe delivery temperature, protecting against scalding while maintaining high storage temperatures to manage legionella risk.
Officially recognised in RdSAP modelling, the Cube X supports improved SAP scores and elevated EPC ratings — helping housing providers meet energy performance targets on retrofit programmes.
Must be installed by a competent heating engineer. Although G3 certification is not required, all work must comply with current Building Regulations and Water Regulations. The unit requires 16A, 230–240V, 1.5mm² CSA electrical supply. Annual servicing is recommended to maintain performance and warranty validity.
| Specification | Value |
|---|---|
| Model | Cube X 210L |
| Nominal Capacity | 210 Litres |
| Width | 520 mm |
| Depth | 585 mm |
| Height (inc. fittings) | 1,650 mm |
| Required Clearances | W+50mm | D+50mm | H+475mm |
| Dry Weight | 44 kg |
| Wet Weight | 246 kg |
| Primary Connections | 22mm compression |
| Overfill Pipe Connection | G ¾" |
| Electrical Requirements | 16A, 230–240V, 1.5mm² CSA |
| DHW Coil Max Operating Pressure | 3 bar |
| Primary Coil Pressure Drop @ 15 l/min | 134 mbar |
| Max Permissible Storage Temperature | 65°C |
| Standing Heat Loss | 1.24 kWh/24h |
| ErP Energy Rating | B |
Original: $3,653.56
-65%$3,653.56
$1,278.75More Images
Mixergy Cube X 210L Smart Thermal Store
The Mixergy Cube X 210L Smart Thermal Store is a G3-exempt, app-connected hot water cylinder engineered specifically for retrofit projects where space is tight and traditional unvented systems are impractical. Unlike conventional cylinders that heat the entire tank, the Cube X uses Mixergy's patented top-down heating technology — only warming the water you actually need, slashing energy bills and recovery times in the process. Recognised in RdSAP and designed to elevate EPC ratings, it is the smart cylinder of choice for housing providers, retrofit teams, and eco-conscious homeowners alike.
The Cube X is a thermal store, not an unvented pressure cylinder. No discharge pipework is required, no G3 annual certification is needed, and no Unvented (G3) qualified engineer is mandatory for installation — dramatically cutting project costs and compliance overhead.
Hot water accumulates from the top of the tank downwards, so even a partially heated cylinder delivers usable hot water almost immediately. This means less energy wasted heating water that won't be used.
Control the cylinder remotely via the Mixergy iOS and Android app. Set schedules, monitor energy use, boost hot water on demand, and receive insights — all from your phone.
At just 520mm wide × 585mm deep × 1,650mm tall (inc. fittings), the Cube X fits into tight airing cupboards and retrofit spaces where a traditional cylinder would not.
The Mixergy IO platform uses machine learning to predict hot water demand and optimise heating schedules automatically, reducing energy consumption without sacrificing comfort.
Integrates with time-of-use electricity tariffs (e.g. Octopus Agile) to heat water during cheapest periods. Solar PV diverter capability available — heat water from your own roof.
Housing providers gain remote visibility of all cylinders via the IO dashboard — monitoring temperatures, energy performance, and predictive maintenance alerts across their entire stock.
A built-in gauge on the side of the unit shows hot water level at a glance, with a simple power button to switch on or off — ideal for tenants unfamiliar with smart technology.
An integrated thermostatic mixing valve (TMV) blends the stored water to a safe delivery temperature, protecting against scalding while maintaining high storage temperatures to manage legionella risk.
Officially recognised in RdSAP modelling, the Cube X supports improved SAP scores and elevated EPC ratings — helping housing providers meet energy performance targets on retrofit programmes.
Must be installed by a competent heating engineer. Although G3 certification is not required, all work must comply with current Building Regulations and Water Regulations. The unit requires 16A, 230–240V, 1.5mm² CSA electrical supply. Annual servicing is recommended to maintain performance and warranty validity.
| Specification | Value |
|---|---|
| Model | Cube X 210L |
| Nominal Capacity | 210 Litres |
| Width | 520 mm |
| Depth | 585 mm |
| Height (inc. fittings) | 1,650 mm |
| Required Clearances | W+50mm | D+50mm | H+475mm |
| Dry Weight | 44 kg |
| Wet Weight | 246 kg |
| Primary Connections | 22mm compression |
| Overfill Pipe Connection | G ¾" |
| Electrical Requirements | 16A, 230–240V, 1.5mm² CSA |
| DHW Coil Max Operating Pressure | 3 bar |
| Primary Coil Pressure Drop @ 15 l/min | 134 mbar |
| Max Permissible Storage Temperature | 65°C |
| Standing Heat Loss | 1.24 kWh/24h |
| ErP Energy Rating | B |
Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The Mixergy Cube X 210L Smart Thermal Store is a G3-exempt, app-connected hot water cylinder engineered specifically for retrofit projects where space is tight and traditional unvented systems are impractical. Unlike conventional cylinders that heat the entire tank, the Cube X uses Mixergy's patented top-down heating technology — only warming the water you actually need, slashing energy bills and recovery times in the process. Recognised in RdSAP and designed to elevate EPC ratings, it is the smart cylinder of choice for housing providers, retrofit teams, and eco-conscious homeowners alike.
The Cube X is a thermal store, not an unvented pressure cylinder. No discharge pipework is required, no G3 annual certification is needed, and no Unvented (G3) qualified engineer is mandatory for installation — dramatically cutting project costs and compliance overhead.
Hot water accumulates from the top of the tank downwards, so even a partially heated cylinder delivers usable hot water almost immediately. This means less energy wasted heating water that won't be used.
Control the cylinder remotely via the Mixergy iOS and Android app. Set schedules, monitor energy use, boost hot water on demand, and receive insights — all from your phone.
At just 520mm wide × 585mm deep × 1,650mm tall (inc. fittings), the Cube X fits into tight airing cupboards and retrofit spaces where a traditional cylinder would not.
The Mixergy IO platform uses machine learning to predict hot water demand and optimise heating schedules automatically, reducing energy consumption without sacrificing comfort.
Integrates with time-of-use electricity tariffs (e.g. Octopus Agile) to heat water during cheapest periods. Solar PV diverter capability available — heat water from your own roof.
Housing providers gain remote visibility of all cylinders via the IO dashboard — monitoring temperatures, energy performance, and predictive maintenance alerts across their entire stock.
A built-in gauge on the side of the unit shows hot water level at a glance, with a simple power button to switch on or off — ideal for tenants unfamiliar with smart technology.
An integrated thermostatic mixing valve (TMV) blends the stored water to a safe delivery temperature, protecting against scalding while maintaining high storage temperatures to manage legionella risk.
Officially recognised in RdSAP modelling, the Cube X supports improved SAP scores and elevated EPC ratings — helping housing providers meet energy performance targets on retrofit programmes.
Must be installed by a competent heating engineer. Although G3 certification is not required, all work must comply with current Building Regulations and Water Regulations. The unit requires 16A, 230–240V, 1.5mm² CSA electrical supply. Annual servicing is recommended to maintain performance and warranty validity.
| Specification | Value |
|---|---|
| Model | Cube X 210L |
| Nominal Capacity | 210 Litres |
| Width | 520 mm |
| Depth | 585 mm |
| Height (inc. fittings) | 1,650 mm |
| Required Clearances | W+50mm | D+50mm | H+475mm |
| Dry Weight | 44 kg |
| Wet Weight | 246 kg |
| Primary Connections | 22mm compression |
| Overfill Pipe Connection | G ¾" |
| Electrical Requirements | 16A, 230–240V, 1.5mm² CSA |
| DHW Coil Max Operating Pressure | 3 bar |
| Primary Coil Pressure Drop @ 15 l/min | 134 mbar |
| Max Permissible Storage Temperature | 65°C |
| Standing Heat Loss | 1.24 kWh/24h |
| ErP Energy Rating | B |
