Phone: 023 9354 1154
Email: info@spafix.co.uk
Phone: 023 9354 1154
Email: info@spafix.co.uk
If you own a hot tub or swim spa—or are planning to purchase one—adding an air source heat pump is a smart investment. At Spafix, hot tub and swim spa heat pumps are among our most popular accessories, with hundreds of satisfied customers already enjoying significant savings on energy bills.
Our featured range, the Vian Nexus heat pump, combines advanced technology with sleek design, delivering high performance even in colder climates. With hybrid rapid heating, anti-freeze protection, and smart-control capability, the Vian Nexus is built for year-round use and maximum energy efficiency.
Save up to 70% on your energy bills compared to traditional electric heating, thanks to advanced technology and high COP performance.
Engineered to perform reliably year-round, even in sub-zero temperatures—perfect for British winters and unpredictable weather.
The sleek, modern design fits neatly beside any hot tub or swim spa without compromising your garden’s visual appeal or usable space.
Built-in WiFi connectivity lets you monitor and adjust your heat pump remotely, allowing maximum efficiency and convenience via your smartphone.
Designed specifically for hot tubs and swim spas in UK climates, the Vian Nexus heat pumps come in three performance models: Nexus 5, Nexus 6, and Nexus 7 EVI. Whether you’re upgrading an existing spa or planning a new installation, a Vian Nexus heat pump offers the ideal combination of performance, durability, and cost savings. Reduce your energy bills, heat your spa faster, and enjoy greater control with the UK’s leading hot tub heat pump solution.
Key Features
from £1,749 (installation included)
The Nexus 6 is engineered for efficient heating in colder environments, making it ideal for users who need consistent spa performance in low temperatures. Equipped with Electronic Expansion Valve technology, it achieves a COP of up to 12.5.
Key Features
from £2,049 (installation included)
Capable of operating efficiently at temperatures as low as -25°C, the Nexus 7 EVI maximises heating capacity while maintaining energy efficiency—ensuring powerful, reliable performance when you need it most.
Key Features
The chart shows the kWh used by the heat pump to maintain the set point of 40°C. The test period is for a 10 month period between the 8th December 2022 and the 7th September 2023.
The total kWh used by the heat pump over this period was 749.55. Accoring to Ofgem, from the 1st October 2023, new kwh rate will be set at 27.35p. With this pricing structure, the cost of this 10 month period at the coming rate £205, equating to an average cost of just £20.50 a month.
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:
Fill in the form below and a member of our team will be in touch to help you choose the best heat pump for your spa setup. Whether you’re upgrading or buying new, we’ll guide you through installation and savings.
Fill out the form below, and a member of our team will be in touch to discuss the best heat pump options to suit your needs.