Mixergy Cube X 150L Smart Thermal Store
The Mixergy Cube X 150L Smart Thermal Store brings Mixergy's award-winning top-down heating intelligence to smaller properties and tighter retrofit spaces. G3-exempt by design, it requires no discharge pipework and no annual Unvented certification — making it one of the most installer-friendly hot water solutions available. Whether the project is an apartment, maisonette, or a constrained social housing property, the Cube X 150L delivers smart, connected, energy-efficient hot water in a footprint that fits almost anywhere.
Unlike a conventional unvented cylinder, the Cube X is a thermal store: mains cold water is heated indirectly via an internal coil, so the stored water is never under mains pressure. This G3-exempt architecture means no expansion vessel, no discharge pipe, and no annual safety inspection — while still delivering full mains-pressure hot water to all outlets.
Mixergy's unique heating element heats from the top down, creating a usable hot water layer immediately — meaning a 30% full tank delivers a hot shower rather than a tepid one. Energy is only spent heating what you need.
The Mixergy app (iOS & Android) gives residents full control: set heating schedules, boost hot water on demand, track energy use, and configure smart tariff integration — all remotely.
At 520mm wide × 585mm deep × 1,315mm tall (inc. fittings), the 150L Cube X is purpose-built to slot into the tightest retrofit spaces — apartments, sheltered housing, and narrow airing cupboards included.
Connected to the Mixergy IO platform, the cylinder learns household hot water patterns and adjusts heating automatically — reducing unnecessary heating while always ensuring adequate supply.
Works with time-of-use tariffs like Octopus Agile to heat water during cheapest or negative-price periods. Future-proof for grid-balancing and demand side response programmes.
The Mixergy IO dashboard allows housing managers to monitor cylinder health, temperatures, and energy use remotely across their entire portfolio — reducing field visits and service costs.
The Cube X is officially recognised in RdSAP, supporting improved SAP scores and higher EPC ratings. This helps housing providers and developers meet energy compliance targets on retrofit projects.
Where solar PV is fitted, the Cube X can divert surplus solar generation into free hot water — maximising self-consumption and reducing grid energy bills without any additional diverter hardware on some configurations.
An integrated Thermostatic Mixing Valve delivers blended water at a safe temperature. The overfill connection provides a simple, passive safety vent — no complex discharge pipe arrangement required.
Must be installed by a competent heating engineer. G3 Unvented certification is not required, but all work must comply with Building and Water Regulations. The unit requires a dedicated 16A, 230–240V, 1.5mm² CSA electrical supply. Annual servicing is recommended to maintain performance and warranty.
| Specification | Value |
|---|---|
| Model | Cube X 150L |
| Nominal Capacity | 150 Litres |
| Width | 520 mm |
| Depth | 585 mm |
| Height (inc. fittings) | 1,315 mm |
| Required Clearances | W+50mm | D+50mm | H+475mm |
| Dry Weight | 36 kg |
| Wet Weight | 188 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 | 107 mbar |
| Max Permissible Storage Temperature | 65°C |
| Standing Heat Loss | 1.12 kWh/24h |
| ErP Energy Rating | B |
Original: $3,237.86
-65%$3,237.86
$1,133.25More Images
Mixergy Cube X 150L Smart Thermal Store
The Mixergy Cube X 150L Smart Thermal Store brings Mixergy's award-winning top-down heating intelligence to smaller properties and tighter retrofit spaces. G3-exempt by design, it requires no discharge pipework and no annual Unvented certification — making it one of the most installer-friendly hot water solutions available. Whether the project is an apartment, maisonette, or a constrained social housing property, the Cube X 150L delivers smart, connected, energy-efficient hot water in a footprint that fits almost anywhere.
Unlike a conventional unvented cylinder, the Cube X is a thermal store: mains cold water is heated indirectly via an internal coil, so the stored water is never under mains pressure. This G3-exempt architecture means no expansion vessel, no discharge pipe, and no annual safety inspection — while still delivering full mains-pressure hot water to all outlets.
Mixergy's unique heating element heats from the top down, creating a usable hot water layer immediately — meaning a 30% full tank delivers a hot shower rather than a tepid one. Energy is only spent heating what you need.
The Mixergy app (iOS & Android) gives residents full control: set heating schedules, boost hot water on demand, track energy use, and configure smart tariff integration — all remotely.
At 520mm wide × 585mm deep × 1,315mm tall (inc. fittings), the 150L Cube X is purpose-built to slot into the tightest retrofit spaces — apartments, sheltered housing, and narrow airing cupboards included.
Connected to the Mixergy IO platform, the cylinder learns household hot water patterns and adjusts heating automatically — reducing unnecessary heating while always ensuring adequate supply.
Works with time-of-use tariffs like Octopus Agile to heat water during cheapest or negative-price periods. Future-proof for grid-balancing and demand side response programmes.
The Mixergy IO dashboard allows housing managers to monitor cylinder health, temperatures, and energy use remotely across their entire portfolio — reducing field visits and service costs.
The Cube X is officially recognised in RdSAP, supporting improved SAP scores and higher EPC ratings. This helps housing providers and developers meet energy compliance targets on retrofit projects.
Where solar PV is fitted, the Cube X can divert surplus solar generation into free hot water — maximising self-consumption and reducing grid energy bills without any additional diverter hardware on some configurations.
An integrated Thermostatic Mixing Valve delivers blended water at a safe temperature. The overfill connection provides a simple, passive safety vent — no complex discharge pipe arrangement required.
Must be installed by a competent heating engineer. G3 Unvented certification is not required, but all work must comply with Building and Water Regulations. The unit requires a dedicated 16A, 230–240V, 1.5mm² CSA electrical supply. Annual servicing is recommended to maintain performance and warranty.
| Specification | Value |
|---|---|
| Model | Cube X 150L |
| Nominal Capacity | 150 Litres |
| Width | 520 mm |
| Depth | 585 mm |
| Height (inc. fittings) | 1,315 mm |
| Required Clearances | W+50mm | D+50mm | H+475mm |
| Dry Weight | 36 kg |
| Wet Weight | 188 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 | 107 mbar |
| Max Permissible Storage Temperature | 65°C |
| Standing Heat Loss | 1.12 kWh/24h |
| ErP Energy Rating | B |
Product Information
Product Information
Shipping & Returns
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Description
The Mixergy Cube X 150L Smart Thermal Store brings Mixergy's award-winning top-down heating intelligence to smaller properties and tighter retrofit spaces. G3-exempt by design, it requires no discharge pipework and no annual Unvented certification — making it one of the most installer-friendly hot water solutions available. Whether the project is an apartment, maisonette, or a constrained social housing property, the Cube X 150L delivers smart, connected, energy-efficient hot water in a footprint that fits almost anywhere.
Unlike a conventional unvented cylinder, the Cube X is a thermal store: mains cold water is heated indirectly via an internal coil, so the stored water is never under mains pressure. This G3-exempt architecture means no expansion vessel, no discharge pipe, and no annual safety inspection — while still delivering full mains-pressure hot water to all outlets.
Mixergy's unique heating element heats from the top down, creating a usable hot water layer immediately — meaning a 30% full tank delivers a hot shower rather than a tepid one. Energy is only spent heating what you need.
The Mixergy app (iOS & Android) gives residents full control: set heating schedules, boost hot water on demand, track energy use, and configure smart tariff integration — all remotely.
At 520mm wide × 585mm deep × 1,315mm tall (inc. fittings), the 150L Cube X is purpose-built to slot into the tightest retrofit spaces — apartments, sheltered housing, and narrow airing cupboards included.
Connected to the Mixergy IO platform, the cylinder learns household hot water patterns and adjusts heating automatically — reducing unnecessary heating while always ensuring adequate supply.
Works with time-of-use tariffs like Octopus Agile to heat water during cheapest or negative-price periods. Future-proof for grid-balancing and demand side response programmes.
The Mixergy IO dashboard allows housing managers to monitor cylinder health, temperatures, and energy use remotely across their entire portfolio — reducing field visits and service costs.
The Cube X is officially recognised in RdSAP, supporting improved SAP scores and higher EPC ratings. This helps housing providers and developers meet energy compliance targets on retrofit projects.
Where solar PV is fitted, the Cube X can divert surplus solar generation into free hot water — maximising self-consumption and reducing grid energy bills without any additional diverter hardware on some configurations.
An integrated Thermostatic Mixing Valve delivers blended water at a safe temperature. The overfill connection provides a simple, passive safety vent — no complex discharge pipe arrangement required.
Must be installed by a competent heating engineer. G3 Unvented certification is not required, but all work must comply with Building and Water Regulations. The unit requires a dedicated 16A, 230–240V, 1.5mm² CSA electrical supply. Annual servicing is recommended to maintain performance and warranty.
| Specification | Value |
|---|---|
| Model | Cube X 150L |
| Nominal Capacity | 150 Litres |
| Width | 520 mm |
| Depth | 585 mm |
| Height (inc. fittings) | 1,315 mm |
| Required Clearances | W+50mm | D+50mm | H+475mm |
| Dry Weight | 36 kg |
| Wet Weight | 188 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 | 107 mbar |
| Max Permissible Storage Temperature | 65°C |
| Standing Heat Loss | 1.12 kWh/24h |
| ErP Energy Rating | B |
