The NEXUS EVO 6 is a professional-grade inverter heat pump engineered for cold-climate spa heating. Designed to operate reliably down to –20°C, it delivers outstanding performance all year round. With a COP of up to 12.5, the EVO 6 is up to 75% more efficient than a traditional electric heater—saving you money while keeping your water perfectly heated.
Powered by full DC inverter technology with an Electronic Expansion Valve (EEV), the EVO 6 provides fast heat-up times, stable temperature control, low running costs and quiet operation. It’s the ideal upgrade for hot tub owners, swim spa users and holiday let operators looking for reliable, low-cost heating even in harsh winter conditions.
Key Features
Exceptional Efficiency (COP Up to 12.5)
Delivers up to 12.5 kW of heat for every 1 kW of electricity used—cutting running costs by up to 70%.
Cold-Climate Performance to –20°C
WarmCore anti-freeze bands protect the compressor and tray, ensuring stable operation in freezing conditions.
Full Inverter Technology with EEV
Smooth, precise modulation for faster heating, quieter performance, lower energy use and extended component life.
Hybrid Logic Compatibility
Supports optional electric heater control for rapid heat-up—ideal for holiday lets and commercial spas.
Smart WiFi Control
Built-in WiFi with Smart Life App for remote control, scheduling, monitoring and system alerts.
Compact & Quiet
Low-profile footprint (626 × 442 × 467mm) and quiet operation below 50 dB(A) make it suitable for residential gardens.
Universal Control Integration
Compatible with Gecko in.grid and Balboa systems (optional communication cable required).
Eco-Friendly Design
Uses R32 refrigerant and a titanium heat exchanger for long-lasting, corrosion-resistant performance.
Technical Highlights
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Heating Capacity (Spa Mode, 15°C Ambient): 2.02 – 5.24 kW
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Heating Capacity (0°C Ambient): 1.36 – 3.02 kW
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Operating Range: –20°C to +43°C
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Water Temperature: 15°C to 40°C
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Refrigerant: R32
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Sound Level: <50 dB(A) at 1m
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Water Flow Rate: 3.0 m³/h
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Dimensions: 626mm (W) × 442mm (H) × 467mm (D)
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Weight: 38kg
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IP Rating: IPX4
Full technical specifications available in the downloadable user manual.
Ideal For
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Hot tubs (1,000 – 2,500 litres)
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Swim spas up to 3,500 litres
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Cold-climate installations
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Holiday lets and commercial spas
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Eco-conscious users looking to reduce energy bills
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Replacing standard 3kW heaters with a high-efficiency solution
Why Upgrade to the NEXUS EVO 6?
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Up to 70% cheaper to run than an electric heater
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Works reliably in freezing winter conditions
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Quieter and more efficient than fixed-speed heat pumps
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Smart WiFi control as standard
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Strong performance even at low temperatures
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Compact size and low noise make it suitable for most gardens
Installation Notes
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Requires hard-pipe plumbing (48.3mm)
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Must maintain 3.0 m³/h water flow
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Recommended bypass valve for maintenance
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Installation must be completed by a qualified electrician
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Works standalone or integrated with leading spa control systems
What’s Included
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NEXUS EVO 6 heat pump
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Wired LCD controller
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Rubber mounting pads
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Drain connectors and pipework
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Plumbing adapters
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Power splitter and adapter
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User manual
Optional: HP-AC006 communication cable for Gecko/Balboa integration.
For more information on Heat source pumps, please see here
