Experience powerful, reliable spa heating in any season with the Vian Power NEXUS EVO 7 EVI, the next-generation inverter heat pump engineered for extreme cold climates. Designed for hot tubs, swim spas and holiday-let installations, this advanced unit uses Enhanced Vapor Injection (EVI) technology to maintain strong heating output even in temperatures as low as –25°C. Whether you want year-round home spa use or dependable performance for commercial environments, the EVO 7 delivers exceptional efficiency, ultra-quiet operation and seamless smart control.

Engineered for Extreme Cold

While many heat pumps lose efficiency or stop working below freezing, the NEXUS EVO 7 stands apart. Its EVI system, combined with WarmCore heated compressor and base tray, ensures consistent performance in severe winter conditions. Even at –25°C ambient, the unit continues to heat effectively — delivering genuine all-season reliability.

Outstanding Energy Efficiency

With a COP of up to 14.2, the EVO 7 can turn 1 kW of electricity into up to 14.2 kW of usable heat.
Even at 0°C ambient, it delivers a COP of 4.05 — around four times more efficient than a standard electric heater. Over a full heating season, this can reduce running costs by £800–£1,500 compared to traditional 3kW electric elements.

Hybrid Logic for Faster Heat-Up

For rapid temperature recovery, the EVO 7 supports an optional 3kW hybrid electric heater. This is perfect for holiday lets, commercial spas or any situation where fast turnaround is essential.

Fully Compatible With Popular Spa Systems

Using the optional HP-AC006 communication cable, the NEXUS EVO 7 integrates with Balboa and Gecko control systems, allowing your spa pack to manage the heat pump automatically. It can also operate standalone using the included LCD controller or WiFi app.

Ultra-Quiet Performance

Operating at just 29 dB(A) at 10 meters, the EVO 7 is quieter than a whisper. Anti-vibration mounts and a low-profile casing ensure minimal disturbance for home or commercial settings.

Built for Longevity

A premium titanium heat exchanger, corrosion-resistant materials, IP×4 water resistance, and a GMCC inverter compressor ensure reliable, long-term operation in all weather conditions.

Key Features

• EVI technology for reliable heating down to –25°C

• COP up to 14.2 for exceptional energy efficiency

• Full inverter compressor for smooth, quiet, efficient performance

• WarmCore anti-freeze heating on compressor and tray

• Hybrid heater support for rapid heat-up

• Compatible with Balboa & Gecko systems

• Smart WiFi control via Smart Life app

• Titanium heat exchanger for maximum durability

• R32 refrigerant for reduced environmental impact

• Whisper-quiet operation (29 dB at 10m)

• Compact size: 626 × 467 × 442 mm

Technical Specification (Condensed for Readability)

• Heating Capacity: 2.00 – 7.12 kW

• COP: Up to 14.2 (ideal conditions)

• Operating Range: Heating –25°C to +43°C / Cooling +10°C to +43°C

• Water Temperature: Heating 15–40°C / Cooling 8–35°C

• Compressor: GMCC Rotary Inverter with EVI

• Refrigerant: R32

• Water Flow: 3.0 m³/h (50 L/min)

• Sound Levels: 51 dB at 1m / 29 dB at 10m

• Dimensions: 626 × 467 × 442 mm (pads installed)

• Weight: 37 kg

• Included Accessories: Pads, drain fittings, pipe joints, controller, power adapters

• Optional: HP-AC006 Balboa/Gecko communication cable

Real-World Heating Performance

Below are typical heat-up time estimates for 15°C → 38°C:

• 1,000 L spa: 5–7 hours

• 1,600 L spa: 8–11 hours

• 2,200 L spa: 11–15.5 hours

• 3,000 L swim spa: 15–21 hours

• 4,500 L swim spa: 22.5–31.5 hours

Actual times vary depending on insulation, water temperature, weather conditions and cover quality. Using hybrid mode can reduce heat-up times by 30–40%.

Is the EVO 7 Right for Your Spa?

• Excellent: 800 – 2,500 L spas

• Good: 2,500 – 3,500 L spas

• Adequate: 3,000 – 4,000 L swim spas (with good insulation)

• Marginal: 4,000+ L (consider a larger model or hybrid operation)

Installation Essentials

• Electrical: 220–240V supply, 25A D-curve breaker, 30mA RCD, 1.5mm²+ cable, proper earthing

• Plumbing: 48.3mm connections, bypass valve recommended, max 10m pipe run

• Clearances: 2m front, 300mm sides/rear, free airflow required

• Drainage: Condensate drainage required

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