Transform your spa experience with the most advanced cold-climate heating technology available. The Vian Power NEXUS EVO 7 EVI is engineered for spa and swim spa owners who demand reliable performance in even the harshest winter conditions. With Enhanced Vapor Injection (EVI) technology and an exceptional COP of up to 14.2, this heat pump delivers outstanding efficiency while operating reliably down to -25°C.

Whether you’re running a holiday rental, managing a commercial spa facility, or simply want your personal spa ready year-round, the NEXUS EVO 7 provides powerful, efficient heating with intelligent control integration and whisper-quiet operation.

Extreme Cold Performance You Can Trust Most heat pumps struggle or fail completely when temperatures drop below freezing. The NEXUS EVO 7 EVI is different. Thanks to its advanced EVI (Enhanced Vapor Injection) technology combined with WarmCore compressor and tray heating, this heat pump maintains consistent, powerful heating even when ambient temperatures plummet to -25°C. That’s genuine all-season reliability.

Exceptional Energy Efficiency = Lower Running Costs With a Coefficient of Performance (COP) reaching up to 14.2 in optimal conditions, the NEXUS EVO 7 transforms every 1kW of electricity into up to 14.2kW of heating power. Even at 0°C ambient temperature, it maintains a COP of 4.05 – meaning you get 4 times more heat energy than electricity consumed. Over a heating season, this translates to substantial savings compared to traditional electric heaters.

Smart Hybrid Logic for Rapid Heat-Up Need your spa ready quickly? The built-in hybrid logic supports a 3kW direct electric heater override, giving you the flexibility to boost heating speed when needed – perfect for holiday rentals, commercial operations, or unexpected guests.

Seamless System Integration The NEXUS Communication System is fully compatible with popular spa control systems from Balboa and Gecko. Use the optional HP-AC006 input switch cable to integrate external controls, allowing your existing spa system to command the heat pump automatically. One less thing to think about.

Whisper-Quiet Operation At just 29 dB(A) sound pressure at 10 meters, the NEXUS EVO 7 is quieter than a whisper. Your spa retreat remains peaceful, and your neighbors stay happy. Anti-vibration rubber feet and a low-profile design further minimize noise and vibration.

Built to Last Premium titanium heat exchanger resists corrosion and scaling, ensuring long-term reliability even with varying water chemistry. IP×4 water protection rating means the unit handles outdoor installation with confidence. Quality Mitsubishi or GMCC rotary compressor delivers years of dependable service.

⚡ Key Features at a Glance

✅ EVI Technology – Enhanced Vapor Injection ensures reliable heating down to -25°C ambient temperature
✅ Ultra-High Efficiency – COP up to 14.2 in swimming pool mode, up to 7.41 in spa heating mode
✅ Full Inverter System – Variable speed compressor adjusts output for optimal efficiency and comfort
✅ WarmCore Heating – Integrated compressor and tray heating prevents freeze-up in extreme cold
✅ Hybrid Logic Ready – Supports 3kW electric heater integration for rapid heating boost
✅ Universal Compatibility – Works with Balboa BP6013G2/G3, BP2100G0/G1, BP214PBC control systems and Gecko modules
✅ Smart Controls – LCD wire controller with Wi-Fi connectivity via Smart Life app
✅ Titanium Heat Exchanger – Superior corrosion resistance and longevity
✅ R32 Refrigerant – Environmentally friendly, lower global warming potential
✅ Ultra-Quiet – 29 dB(A) at 10m distance (quieter than ambient night sounds)
✅ Compact Footprint – Just 626mm × 467mm × 442mm with rubber pads installed
✅ Three Operating Modes – Heating, cooling, and automatic mode selection
✅ Timer Function – Three programmable timers for automated scheduling
✅ Silent & Powerful Modes – Adjust performance to suit your needs

🔧 Complete Technical Specifications

Specification	Details
Model	NEXUS EVO 7 EVI
Technology Type	Full Inverter with Enhanced Vapor Injection (EVI)
Heating Capacity Range	2.00 – 7.12 kW (variable)
Cooling Capacity Range	1.47 – 2.11 kW (variable)
Maximum COP (Heating)	Up to 14.2 (swimming pool mode, 26°C ambient)
COP at 15°C Ambient	7.41 (spa heating to 38°C)
COP at 0°C Ambient	4.05 (spa heating to 38°C)
COP at -10°C Ambient	3.23 (spa heating to 38°C)
Maximum EER (Cooling)	4.74 (35°C ambient)
Operating Temperature Range	Heating: -25°C to +43°C ambient<br>Cooling: +10°C to +43°C ambient
Water Temperature Range	Heating: 15°C to 40°C<br>Cooling: 8°C to 35°C
Power Supply	220-240V AC, 50Hz, Single Phase
Rated Power Input	2.2 kW
Rated Current	9.65 A
Compressor	GMCC Rotary Inverter with EVI
Refrigerant Type	R32 (GWP 675 – environmentally friendly)
Heat Exchanger	Titanium tube-in-tube design
Water Flow Rate	3.0 m³/h (50 L/min)
Water Pressure Drop	18 kPa at rated flow
Water Connection Size	48.3mm (1.5″ flexible hose connection)
Control Interface	Backlit LCD wire controller with touch keys
Wi-Fi Connectivity	Yes – Smart Life app compatible (iOS & Android)
Control Compatibility	Balboa (BP6013G2/G3, BP2100G0/G1, BP214PBC)<br>Gecko (via communication cable)
Sound Pressure Level	51 dB(A) at 1 meter<br>29 dB(A) at 10 meters (ultra-quiet)
Protection Rating	IP×4 (water splash resistant)
Safety Class	Class I (grounded)
Dimensions (W×D×H)	626 × 467 × 442 mm (with rubber pads)<br>626 × 554 × 500 mm (with rubber blocks)
Net Weight	37 kg
Accessories Included	4× rubber pads, 2× drain connectors, 2× drain pipes, 2× water pipe joints, 1× wrench, 1× power cable splitter, 1× power cable adapter, user manual
Optional Accessories	HP-AC006 communication cable for external control integration

🌡️ Real-World Performance Data

Understanding how quickly your spa will heat is crucial for planning and expectations. Below are estimated heat-up times for common spa and swim spa volumes based on the NEXUS EVO 7’s heating capacity.

Heat-Up Time Estimates (Various Spa Volumes)

Calculation Formula:
Time (hours) = (Water Volume in m³ × Temperature Rise in °C × 1.16) ÷ Heat Pump kW Rating

Temperature Rise: 15°C to 38°C (23°C rise)

Water Volume	Litres	Estimated Heat-Up Time at 15°C Ambient*	Estimated Heat-Up Time at 0°C Ambient*
Small Spa	1,000 L (1.0 m³)	5.0 hours	7.0 hours
Medium Spa	1,600 L (1.6 m³)	8.0 hours	11.0 hours
Large Spa	2,200 L (2.2 m³)	11.0 hours	15.5 hours
Small Swim Spa	3,000 L (3.0 m³)	15.0 hours	21.0 hours
Large Swim Spa	4,500 L (4.5 m³)	22.5 hours	31.5 hours

These are theoretical estimates based on ideal conditions. Actual times may vary depending on ambient temperature, humidity, wind conditions, water source temperature, spa insulation quality, and cover usage.

Temperature Rise: 20°C to 38°C (18°C rise)

Water Volume	Litres	Estimated Heat-Up Time at 15°C Ambient*	Estimated Heat-Up Time at 0°C Ambient*
Small Spa	1,000 L (1.0 m³)	3.9 hours	5.5 hours
Medium Spa	1,600 L (1.6 m³)	6.3 hours	8.8 hours
Large Spa	2,200 L (2.2 m³)	8.6 hours	12.0 hours
Small Swim Spa	3,000 L (3.0 m³)	11.7 hours	16.4 hours
Large Swim Spa	4,500 L (4.5 m³)	17.6 hours	24.6 hours

Official Manufacturer Data (1,600L spa, 15°C to 38°C):

• At 0°C ambient: 14 hours
• At 15°C ambient: 10 hours
• At 26°C ambient: 7 hours

⚠️ Important Notes on Heat-Up Times:

• These estimates assume continuous operation without heat loss
• Spa insulation quality significantly affects heat-up speed
• Always use a quality insulated cover when heating
• Wind, humidity, and water source temperature impact actual performance
• Initial heat-up from cold water takes longest; maintaining temperature requires much less energy
• Hybrid mode with 3kW electric heater can reduce heat-up times by approximately 30-40%

📄 Downloads & Documentation

Complete Installation & User Manual 📄
View NEXUS EVO 6/7 User Manual (opens in new tab)
Comprehensive 60-page manual covering installation procedures, electrical wiring diagrams, plumbing configurations, control panel operation, Wi-Fi setup, troubleshooting codes, maintenance guidelines, and winterization procedures. Essential reading for installers and owners.

🏊 Spa Sizing Guide

Is the NEXUS EVO 7 right for your spa?

Spa Type	Water Volume Range	Suitability	Notes
2-3 Person Spa	800 – 1,200 L	✅ Excellent	Fast heat-up, highly efficient
4-5 Person Spa	1,200 – 1,800 L	✅ Excellent	Ideal capacity range
6-7 Person Spa	1,800 – 2,500 L	✅ Very Good	Reliable performance
8+ Person Spa	2,500 – 3,500 L	⚠️ Good	Longer heat-up times, consider hybrid mode
Small Swim Spa	3,000 – 4,000 L	⚠️ Adequate	Best with good insulation & cover
Large Swim Spa	4,000+ L	⚠️ Marginal	Consider additional heating or larger model

Recommendation: For swim spas over 4,000 liters or commercial applications requiring rapid heat-up, consider combining the NEXUS EVO 7 with a 3kW electric heater using the hybrid logic function, or consider the next model up if available.

💰 Running Cost Comparison

Based on typical UK electricity rates (£0.24 per kWh) and maintaining a spa at 38°C:

Daily Operating Costs (Maintaining Temperature)

Ambient Temperature	Heat Pump Power Consumption	Daily Electricity Cost	Traditional 3kW Electric Heater Cost	Your Savings
26°C (Summer)	~0.5 kWh/day	£0.12	£2.88	Save £2.76/day
15°C (Spring/Autumn)	~1.2 kWh/day	£0.29	£4.32	Save £4.03/day
5°C (Winter)	~2.8 kWh/day	£0.67	£5.76	Save £5.09/day
-5°C (Cold Winter)	~4.2 kWh/day	£1.01	£6.24	Save £5.23/day

Annual Savings: £800 – £1,500+ depending on climate and usage patterns

These estimates assume a well-insulated 1,500L spa with quality cover, maintained at 38°C. Actual costs vary based on insulation, cover quality, ambient conditions, and usage frequency.

🔇 Noise Level Comparison

Understanding noise levels helps you assess whether the NEXUS EVO 7 will be comfortable in your installation location.

Sound Source	Decibel Level	Comparison
NEXUS EVO 7 at 10m	29 dB(A)	Quieter than whisper, library silence
Whisper	30 dB(A)	Barely audible
Quiet library	40 dB(A)	Very quiet
Typical conversation	60 dB(A)	Normal speaking
Standard heat pump	50-55 dB(A)	Noticeable
Vacuum cleaner	70 dB(A)	Loud

Practical Impact: At 10 meters distance, the NEXUS EVO 7 is effectively inaudible against typical background environmental sounds. Even at 1 meter, it operates at just 51 dB(A) – about the volume of a quiet refrigerator.

📱 Smart Control Features

LCD Wire Controller Included

• Large backlit display shows current and target temperatures
• Clear mode indicators (heating/cooling/auto)
• Temperature adjustment buttons
• Three programmable timers
• Auto-lock function
• Celsius/Fahrenheit switching
• System parameter monitoring
• Fault code display with descriptions

Wi-Fi Connectivity via Smart Life App

• Remote control from anywhere with internet connection
• Real-time temperature monitoring
• Mode switching (heating/cooling/auto)
• Timer programming
• Performance mode selection (normal/silent/powerful)
• System parameter checking
• Multi-device control
• Device sharing with family/staff members
• Voice control compatibility (via Smart Life integration)

Balboa & Gecko System Integration When connected via the optional communication cable, the heat pump seamlessly integrates with your spa’s existing control system:

• Single temperature control point
• Automatic mode coordination
• Unified user interface
• Compatible with Balboa systems: BP6013G2, BP6013G3, BP2100G0, BP2100G1, BP214PBC
• Compatible with Gecko control modules
• Temperature synchronization (1-2°C variance is normal)

🛠️ Installation Requirements

Electrical Requirements

• Power Supply: 220-240V AC, 50Hz single phase
• Circuit Protection: 25A D-curve circuit breaker recommended
• RCD Protection: 30mA residual current device (RCD) required by regulations
• Cable Specification: 3-core 1.5mm² minimum (adjust for cable run length)
• Earthing: Proper grounding is mandatory for safety
• Emergency Stop: Required for public/commercial installations

Plumbing Requirements

• Water Flow Rate: 3.0 m³/h (50 L/min) – ensure pump delivers sufficient flow
• Pipe Size: 48.3mm (1.5″ flexible hose) connections
• Maximum Distance: Keep pipe runs ≤10 meters for optimal efficiency
• Pipe Type: Hard pipes required near unit connections (PVC or similar)
• Valves: Install isolation valves and bypass valve as shown in manual
• Filter: Essential – must be cleaned regularly to prevent blockages
• Drainage: Drainage valve on lower pipe required for winterization

Physical Space Requirements

• Minimum Clearances:
  • Front (air discharge): 2,000mm clear space
  • Sides: 300mm each side
  • Rear (air intake): 300mm
  • Top: No obstructions directly above
• Base: Firm, level surface capable of supporting 37kg + water in heat exchanger
• Ventilation: Must have good airflow – do not enclose without adequate ventilation
• Drainage: Condensate drainage required – unit produces water runoff
• Access: Maintain clear access for service and maintenance

Environmental Considerations

• Avoid installation near windows or neighboring properties to minimize noise impact
• Keep away from roads/tracks to prevent mud splashes
• Protect from direct exposure to harsh weather where possible
• Avoid areas with oil, flammable gases, corrosive products, or sulfur compounds
• Keep out of reach of children
• Consider raising unit on blocks in areas with heavy snowfall

⚠️ Professional Installation Required This heat pump involves refrigerant systems, electrical wiring, and safety-critical components. Installation must be performed by qualified professionals in accordance with local regulations and codes. Improper installation can result in equipment damage, voided warranty, safety hazards, or poor performance.

❄️ Winter Protection & Maintenance

Anti-Freeze Protection

• Built-in anti-freeze protection activates automatically when ambient temperature drops below 2°C
• WarmCore compressor and tray heating prevents internal freezing
• Unit can safely operate down to -25°C when powered and running
• If unit must be turned off in freezing conditions, complete water drainage is mandatory

Winterization Procedure (If Shutting Down)

1. Disconnect all electrical power
2. Close isolation valves on water connections
3. Unscrew water inlet connection to drain titanium heat exchanger
4. Allow all water to fully drain from unit and pipes
5. Leave drain connections open to prevent trapped water
6. Cover unit with breathable cover (not sealed plastic)
7. Failure to drain completely can cause expensive freeze damage to the titanium heat exchanger

Regular Maintenance Schedule

Monthly:

• Visual inspection for debris or blockages around air intake/discharge
• Check for unusual sounds or vibrations
• Verify normal operation and temperature achievement

Quarterly:

• Clean finned heat exchanger (rear of unit) with soft brush or vacuum
• Check electrical connections remain tight
• Inspect water connections for leaks
• Clean external casing with damp cloth (no harsh chemicals)

Annually (by qualified technician):

• Complete safety inspection
• Electrical system check and connection tightening
• Earth bonding verification
• Refrigerant pressure check
• Full operational performance test
• Filter cleaning/replacement
• Internal component inspection

🔍 Frequently Asked Questions

Q: How does the NEXUS EVO 7 EVI work in extreme cold compared to standard heat pumps?
A: The EVI (Enhanced Vapor Injection) technology gives the NEXUS EVO 7 a significant advantage in cold weather. Standard heat pumps typically lose 50-70% of their capacity by the time ambient temperature reaches -5°C, and many stop working entirely below -15°C. The NEXUS EVO 7 EVI continues operating reliably down to -25°C thanks to its two-stage compression system and WarmCore heating. At 0°C, it still maintains a COP of 4.05, meaning you get 4 times more heat than electricity consumed.

Q: What size spa or swim spa is this heat pump suitable for?
A: The NEXUS EVO 7 is ideal for spas between 1,000-2,500 liters (2-7 person spas). It can handle small swim spas up to 3,500 liters, though heat-up times will be longer. For larger swim spas (4,000+ liters), consider combining with a 3kW electric heater using the hybrid logic function for faster heating, or select a higher-capacity model if available. Well-insulated spas with quality covers will perform better than poorly insulated ones.

Q: Can I use this with my existing spa control system?
A: Yes! The NEXUS EVO 7 offers multiple integration options:

• Standalone: Use the included LCD wire controller and optional Wi-Fi app
• Balboa Integration: Compatible with BP6013G2/G3, BP2100G0/G1, BP214PBC systems via optional communication cable
• Gecko Integration: Works with Gecko control modules via communication cable
• Relay Control: Can be controlled by external switches/relays using the linkage switch terminals
  When properly integrated with Balboa/Gecko systems, the spa’s existing control panel manages the heat pump automatically.

Q: How much does it cost to run compared to an electric heater?
A: The NEXUS EVO 7 typically costs 60-80% less to operate than a traditional 3kW electric heater. At 15°C ambient temperature with a COP of 7.41, you get 7.41 units of heat for every 1 unit of electricity consumed – that’s 741% efficiency compared to 100% for an electric heater. Even at 0°C with a COP of 4.05, you’re still getting 405% efficiency. Most users save £800-£1,500 annually on heating costs, with the heat pump typically paying for itself in 2-4 years depending on usage.

Q: How loud is this heat pump?
A: The NEXUS EVO 7 is exceptionally quiet. At 10 meters distance, it operates at just 29 dB(A) – quieter than a whisper and below the threshold of most people’s hearing in a quiet outdoor environment. Even at 1 meter, it’s only 51 dB(A), similar to a quiet refrigerator. The unit includes anti-vibration rubber feet and a low-noise DC fan motor. You can also activate “Silent Mode” which reduces the speed further for even quieter operation during nighttime hours (with a slight reduction in heating capacity).

Q: Can it cool my spa in summer?
A: Yes! The NEXUS EVO 7 has a cooling mode with a capacity range of 1.47-2.11 kW. It can reduce water temperature from swimming pool temperatures (27°C+) down to as low as 8°C, though most spa users will want to cool to 20-25°C for refreshing summer soaking. Cooling mode operates efficiently between 10-43°C ambient temperature with an EER of up to 4.74. The automatic mode will switch between heating and cooling as needed to maintain your set temperature.

Q: What is the hybrid logic function?
A: Hybrid logic allows the NEXUS EVO 7 to work in coordination with a 3kW electric heater for faster heat-up when needed. The heat pump controls when the electric heater activates, typically using it during the initial heat-up phase or when ambient temperatures are extremely low. Once the spa reaches near-target temperature, the heat pump takes over for efficient maintenance. This gives you the best of both worlds: fast heat-up when you need it, and efficient operation for ongoing temperature maintenance. Perfect for holiday rentals or commercial spas requiring quick turnaround.

Q: Do I need to drain it in winter?
A: Only if you’re turning the heat pump OFF for an extended period during freezing weather. If you keep the unit powered and operational, the built-in anti-freeze protection and WarmCore heating will protect it down to -25°C. However, if you must shut down during winter, complete drainage of all water from the heat exchanger and pipes is absolutely mandatory to prevent expensive freeze damage to the titanium heat exchanger. The manual provides detailed winterization instructions.

Q: What maintenance does it require?
A: The NEXUS EVO 7 requires minimal maintenance:

• Monthly: Visual check for debris, verify operation
• Quarterly: Clean the finned heat exchanger (rear) with a soft brush or vacuum, inspect connections
• Annually: Professional service including safety checks, refrigerant pressure check, electrical inspection
  Always ensure the water system filter is cleaned regularly to prevent flow restrictions. The titanium heat exchanger is highly resistant to scaling and corrosion, reducing maintenance compared to copper or stainless steel exchangers.

Q: What warranty is included?
A: Warranty terms vary by supplier and region. Contact your supplier or Parts4Tubs for specific warranty information on your purchase. Warranty typically covers manufacturing defects but may not cover damage from improper installation, lack of maintenance, freezing damage, or operation outside specified parameters. Professional installation and adherence to maintenance schedules are usually required to maintain warranty coverage.

Q: Can I install this myself?
A: No. Professional installation by qualified technicians is required and typically mandatory for warranty coverage. The installation involves:

• Refrigerant system connections (requires certified refrigerant handling)
• High-voltage electrical wiring (requires licensed electrician in most jurisdictions)
• Plumbing integration with proper flow rates and pressure management
• Safety device installation (RCD, circuit breakers, emergency stops)
• System commissioning and leak testing
  Improper installation can result in equipment damage, safety hazards, poor performance, and voided warranty.

Q: How long will this heat pump last?
A: With proper installation, regular maintenance, and operation within specified parameters, the NEXUS EVO 7 should provide 10-15 years of reliable service. The titanium heat exchanger is particularly durable and resistant to corrosion. Key factors affecting lifespan include:

• Quality of installation
• Regular maintenance adherence
• Water chemistry management (proper pH and sanitizer levels)
• Protection from extreme weather and physical damage
• Operating within temperature specifications
  The compressor and electronic components are typically the first items requiring replacement as the unit ages.

Q: What if I get a fault code?
A: The NEXUS EVO 7 has built-in diagnostic capabilities displaying fault codes on the LCD controller. Common codes include:

• Er 03: Water flow issue (check pump, valves, filter)
• Er 05: High pressure (check water flow, temperature)
• Er 06: Low pressure (check refrigerant level)
  The included manual has a comprehensive fault code table with troubleshooting steps. Many issues can be resolved by checking water flow, ensuring valves are open, and verifying the water pump is operating correctly. For persistent faults, contact a qualified technician – don’t attempt refrigerant system repairs yourself.

✅ What’s Included in the Box

Your NEXUS EVO 7 EVI heat pump arrives complete with everything needed for installation (plumbing and electrical materials not included):

• ✅ NEXUS EVO 7 EVI Heat Pump (fully charged with R32 refrigerant)
• ✅ LCD Wire Controller with 5-meter cable
• ✅ 4× Anti-vibration rubber pads
• ✅ 2× Drain connectors
• ✅ 2× Drain pipes for condensate removal
• ✅ 2× Water pipe joint adapters (48.3mm)
• ✅ 1× Wrench for maintenance
• ✅ 1× Power cable splitter
• ✅ 1× Power cable adapter
• ✅ Comprehensive User Manual (60 pages)

Optional Accessories (Sold Separately):

• HP-AC006 Communication Cable for Balboa/Gecko integration

Not Included (Required for Installation):

• Water pump (if not built into spa) – 3.0 m³/h flow rate required
• PVC piping, valves, bypass kit, filter
• Electrical cable, circuit breaker, RCD, junction boxes
• Installation labor

🌍 Environmental Credentials

R32 Refrigerant
The NEXUS EVO 7 uses R32, a next-generation refrigerant with significantly lower environmental impact compared to older refrigerants:

• Global Warming Potential (GWP): 675 (67% lower than R410A)
• Zero Ozone Depletion Potential
• Higher efficiency means less electricity consumption
• Easier to recycle at end of life

Energy Efficiency Benefits

• Reduces CO₂ emissions by up to 75% compared to electric heating
• Typical annual electricity savings of 3,000-5,000 kWh
• Equivalent to taking 1-2 cars off the road annually
• Renewable electricity compatible – pair with solar panels for near-zero carbon spa heating

Long Service Life

• Durable titanium heat exchanger lasts 15-20+ years
• Quality components reduce replacement waste
• Serviceable design allows component replacement vs. full unit disposal

🎖️ Technical Certifications & Compliance

• ✅ CE Certified
• ✅ IP×4 Water Protection Rating
• ✅ Class I Electrical Safety (Grounded)
• ✅ Meets UK Electrical Standards
• ✅ RoHS Compliant
• ✅ Pressure Equipment Directive Compliant
• ✅ F-Gas Regulations Compliant

📦 Shipping & Installation Information

Package Dimensions: 650 × 500 × 520mm
Shipping Weight: Approximately 42kg
Installation Time: 4-8 hours (professional installation)

Before Installation Checklist:

• ☐ Confirm electrical supply is suitable (220-240V, 50Hz)
• ☐ Verify water pump provides 3.0 m³/h (50 L/min) flow
• ☐ Ensure installation location has required clearances
• ☐ Prepare firm, level mounting surface
• ☐ Order optional communication cable if integrating with spa control system
• ☐ Schedule licensed electrician and qualified refrigeration technician
• ☐ Obtain any required permits for electrical work

🛒 Why Buy from Parts4Tubs?

✅ Authorized Vian Power Dealer – Genuine products, full manufacturer warranty
✅ Expert Technical Support – Our team knows these products inside and out
✅ Fast UK Shipping – Most items dispatched within 1-2 business days
✅ Installation Guidance – We can recommend qualified installers in your area
✅ Comprehensive Product Range – Everything you need for spa maintenance and upgrades
✅ Competitive Pricing – Best value for premium spa equipment

📞 Need Help Choosing?

Not sure if the NEXUS EVO 7 EVI is the right heat pump for your spa? Our technical team is here to help!

We can help you:

• Calculate required heat pump capacity for your specific spa
• Advise on Balboa/Gecko integration options
• Recommend compatible accessories
• Connect you with qualified installers
• Answer technical questions about installation and operation

⚠️ Important Disclaimers

Heat-Up Time Estimates: All heat-up time calculations are theoretical estimates based on standard formulas and optimal conditions. Actual performance will vary based on ambient temperature, humidity, wind conditions, spa insulation quality, cover type and usage, water source temperature, altitude, and other environmental factors. Use estimates as general guidance only.

Running Cost Estimates: Cost calculations are based on average UK electricity rates (£0.24/kWh) and typical usage patterns. Your actual costs will depend on your local electricity tariff, spa size, insulation quality, target temperature, ambient conditions, and usage frequency. Savings compared to electric heating will vary.

Installation Requirements: All installation work must be performed by qualified professionals in accordance with local codes, regulations, and standards. Improper installation can void warranty, create safety hazards, and result in poor performance or equipment damage.

Professional Installation Mandatory: This product involves refrigerant systems, high-voltage electrical connections, and safety-critical components. Installation must be performed by licensed and certified technicians. Do not attempt DIY installation.

Winterization Required: If the heat pump will be turned off during freezing conditions, complete water drainage is mandatory to prevent freeze damage. Failure to properly winterize can result in expensive damage not covered by warranty.

Regular Maintenance Required: Maintain the heat pump according to the manufacturer’s maintenance schedule to ensure optimal performance, longevity, and warranty coverage. Neglecting maintenance can lead to reduced efficiency, premature failure, and voided warranty.

Transform your spa experience with reliable, efficient, year-round heating. Order your Vian Power NEXUS EVO 7 EVI Heat Pump today!