A black Vian Power device, ideal for hot tub heat pumps, featuring a front-panel display, control buttons, ventilation grid, and the Vian Power logo in the lower left corner.

NEXUS EVO 6

from £1,749 (installation included)

Designed for year-round spa performance, the Nexus EVO 6 delivers dependable, energy-efficient heating, even in harsh winter conditions.

With the ability to operate down to -20°C and a high COP of up to 12.5, it’s the smart choice for colder climates. Featuring advanced Electronic Expansion Valve (EEV) technology and intelligent hybrid logic, the Nexus 6 keeps your spa perfectly warm, no matter the weather.

Why Choose the Vian Nexus Heat Pump?

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HIGH EFFICIENCY

Save up to 70% on your energy bills compared to traditional electric heating, thanks to advanced technology and high COP performance.

A blue thermometer icon with a sun on the left and a snowflake on the right, symbolizing temperature or climate variation—ideal for illustrating hot tub heat pumps—on a light gray circular background.

DESIGNED FOR UK CLIMATE

Engineered to perform reliably year-round, even in sub-zero temperatures—perfect for British winters and unpredictable weather.

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COMPACT, STYLISH AESTHETIC

The sleek, modern design fits neatly beside any hot tub or swim spa without compromising your garden’s visual appeal or usable space.

Blue line drawing of a hand touching the screen of a smartphone—perfect for controlling devices like hot tub heat pumps—centered on a light gray circular background.

SMART CONTROLS

Built-in WiFi connectivity lets you monitor and adjust your heat pump remotely, allowing maximum efficiency and convenience via your smartphone.

Specifications

A table summarizing the Nexus 6 Full DC Inverter Heat Pump specifications, including capacity at various temperatures, power input, usage, operating range, heating rate, flow rate, sound level, step design, and dimensions.

NEXUS EVO 6 Key Features

Hybrid Logic features 3kW Direct Electric Heater Out Logic for rapid heating, making it ideal for holiday lets and short-stay accommodations. This system ensures quick client turnaround by efficiently boosting water temperature when needed.

Equipped with WiFi connectivity, this system allows remote monitoring and control, enabling users to track performance, adjust settings, and optimise efficiency from anywhere using a smartphone or smart device.

R32 is an eco-friendly refrigerant with a lower global warming potential than traditional options. It enhances energy efficiency, improves system performance, and reduces environmental impact, making it a sustainable choice.

Designed for discretion – smooth, steady performance at a soft 50dB.

WarmCore technology provides targeted heating to the compressor body and tray base (model dependent) to melt ice buildup, making it ideal for colder climates and winter use.

Heating/Cooling Technology is a versatile system that provides both heating and cooling capabilities, allowing year-round temperature control.

Warranty Information: 

  • 2 Years on Whole Product
  • 3 Years on Fan, Motor and Heat Exchanger
  • 5 Years on Compressor

Additional Extras

Frequently Asked Questions

How does a hot tub heat pump work?

A hot tub heat pump draws in ambient air, uses refrigerant to absorb heat, compresses it to raise the temperature, and transfers that heat to your spa water via a heat exchanger. This highly efficient process allows you to heat your hot tub using significantly less electricity than a traditional electric heater.

EVI improves heating performance in extreme cold by injecting vapor into the compressor, increasing pressure and heat output. It’s ideal for UK winters.

WarmCore targets heat to the compressor and tray base, helping to prevent ice buildup and ensuring smooth operation in colder temperatures.

Hybrid Logic is a smart feature that combines the efficiency of the heat pump with the speed of a 3kW electric heater. When fast heating is needed—such as after water changes or during heavy use—the electric heater automatically kicks in to boost performance and reduce heating time.
This hybrid system ensures your hot tub or swim spa reaches the desired temperature faster, minimising downtime and maximising comfort, especially in settings like holiday lets or short-stay rentals where quick recovery is essential.

R32 is a low global warming potential refrigerant used in all Nexus models. It’s more efficient, eco-friendly, and helps reduce your environmental footprint.

COP stands for Coefficient of Performance and it measures how efficiently a heat pump converts electricity into heat. For example, a COP of 13 means the unit produces 13 units of heat for every 1 unit of electricity used.

The higher the COP, the lower your energy bills, and the more eco-friendly your setup becomes.

Vian heat pumps are subjected to real world testing, more information of which can be found below. On average, customers reduce running costs by up to 70% compared to traditional electric heating—especially when used year-round.

No – the Vian air source heat pumps are powered directly from your hot tub or swim spa, so no additional electrical installation is required.

In most cases, yes. A heat pump can be integrated with the majority of hot tubs and swim spas. Our team offers a free site survey for local clients to assess compatibility, check installation requirements, and recommend the best solution for your setup. Whether you’re retrofitting an existing spa or adding a heat pump to a new one, we can advise on the most effective approach.

A minimum of 450mm inlet space and 1500mm fan outlet clearance is recommended for optimal performance and airflow.

Generally, no. However, installation must meet space and ventilation guidelines—our team can advise during the site survey.

All models are designed for year-round use, including during freezing winter temperatures. In fact, models like the Nexus EVO 6 and Nexus 7 EVI are built for extreme climates and continue to operate efficiently at -20°C to -25°C.

We offer:

  • 2 Years – Whole Product
  • 3 Years – Fan, Motor, and Heat Exchanger
  • 5 Years – Compressor

What Our Customers Say About Us

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