NEXUS 5 Inverter Heat Pump – Efficient, Quiet & Built for UK Spas
Upgrade your spa or swim spa with the NEXUS 5, a compact inverter heat pump that delivers market-leading efficiency and significant savings on running costs. With a COP of up to 13, it uses up to 70% less energy than traditional electric heaters while keeping your water perfectly warm all year round.
Designed for UK weather and built for reliability, the NEXUS 5 provides stable, efficient heating even in –10°C conditions. It combines full inverter EEV technology with precise temperature control, whisper-quiet performance, and a discreet, space-saving design.
Why Choose the NEXUS 5?
1. Exceptional Energy Savings (COP Up to 13)
Uses far less electricity than a standard heater — saving many users £800–£1,000+ per year.
2. Reliable Winter Performance (Down to –10°C)
The WarmCore heated tray prevents freezing and keeps the system running smoothly in cold weather.
3. Compact, Discreet Size
Small footprint (460 × 399 × 429mm) fits neatly beside most spas without dominating your outdoor space.
4. Full Inverter EEV Technology
Maintains water temperature smoothly with no on/off cycling, reducing noise and energy waste.
5. Compatible With Popular Spa Systems
Works with Gecko in.grid and Balboa Relay (with optional cable) for seamless control.
6. Quiet Operation
32–45 dB(A) — quieter than a normal conversation and ideal for residential settings.
7. Eco-Friendly & Long-Lasting
Built with R32 refrigerant and a titanium heat exchanger for durability and reduced environmental impact.
Ideal For
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Standard hot tubs (1,200–1,800 litres)
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Small swim spas up to 2,000 litres
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Year-round spa users
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Energy-conscious owners looking to cut running costs
Key Technical Highlights
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COP: Up to 13
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Heating Capacity: 2.1kW – 5.1kW
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Power Draw: 0.17kW – 0.90kW
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Operating Range: –10°C to +43°C
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Water Temperature Range: 15°C–40°C
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Refrigerant: R32
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Noise Level: 32–45 dB(A)
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Dimensions: 460 × 399 × 429mm
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Weight: 23.5kg
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Functions: Heating and cooling
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Warranty: 5 years (compressor & heat exchanger), 2 years (components)
Quick FAQ
Will it save me money?
Yes — most hot tub owners save 60–70% on heating costs.
Will it work in winter?
Yes, it is designed for UK climates and operates reliably down to –10°C.
Is it quiet?
Yes, the unit runs between 32–45 dB(A).
Do I need a professional installer?
Professional installation is recommended for the best performance and warranty compliance.
Will it work with my spa controls?
Yes — compatible with Gecko and Balboa systems (optional cable may be required).
What’s Included
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NEXUS 5 heat pump
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Anti-vibration feet
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Hose adapters and fittings
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User manual
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Warranty documents
For more information on Heat source pumps, please see here
