❄️ Balboa Clim8zone II Mini 4kW Heat Pump – Compact Heating & Cooling for Spas & Ice Baths
Ultra-compact heat pump with powerful 4kW output – perfect for hot tubs, cold plunge pools, and ice bath therapy down to 5°C.
📋 Product Overview
The Balboa Clim8zone™ II Mini represents the next generation of compact spa heat pump technology, delivering efficient heating and cooling in a remarkably small footprint. With 4kW heating capacity and the ability to cool water down to 5°C (V2 model), this versatile unit is ideal for both traditional hot tub heating and the growing cold plunge therapy market.
Despite its compact dimensions of just 498 × 495 × 486 mm, the Clim8zone II Mini offers the same intelligent inverter technology as its larger sibling, with a COP of 5 to 10 times that of traditional electric heaters. The variable speed compressor with smart algorithm automatically adjusts output based on ambient and water temperatures, delivering whisper-quiet operation at less than 45 dBA.
Available in two versions: the V1 model cools down to 8°C, while the enhanced V2 model reaches 5°C for optimal ice bath therapy. Both integrate seamlessly with Balboa BP series control systems, allowing full control through your existing spa topside panel.
⭐ Key Features
✅ 4kW Heating Capacity – Efficient output for hot tubs and spas up to 15m³ volume
✅ Cooling Down to 5°C (V2) – Perfect for cold plunge therapy and ice bath applications
✅ Ultra-Compact Design – Just 498 × 495 × 486 mm fits in tight spaces
✅ COP 5-10 (up to 15) – Delivers 5 to 10 times more heat energy than electricity consumed
✅ Whisper-Quiet Operation – Less than 45 dBA, quieter than the larger Clim8zone I
✅ Variable Speed Inverter – Smart algorithm automatically optimises compressor frequency
✅ Cold Climate Operation – Functions effectively down to -5°C ambient temperature
✅ Balboa BP Integration – Direct connection to BP series control systems with visual indicators
✅ SpaTouchMini Upgrade Option – Bezel covers existing TP600 holes for easy retrofit
✅ R32 Refrigerant – Environmentally responsible refrigerant with lower GWP
✅ Lightweight Design – Only 40 kg for easier installation
✅ 1.5″ Plumbing Connections – Standard unions included for easy installation
✅ Dual Mode Operation – Use alone, with electric heater, or both simultaneously
🔧 Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 73005 |
| Model | Clim8zone II Mini |
| Product Type | Air Source Heat Pump (Reversible) |
| Heating Capacity @27°C ambient | 4.0 kW |
| Heating Capacity @15°C ambient | 2.5 kW |
| Cooling Capability (V1) | Down to 8°C |
| Cooling Capability (V2) | Down to 5°C |
| COP Range | 5 to 10 (up to 15 under optimal conditions) |
| Input Voltage | 220-240 V |
| Frequency | 50 Hz |
| Maximum Current | 5.5 A |
| Operating Temp Range (Ambient) | -5°C to 43°C |
| Water Temp Range (Heating) | Up to 40°C |
| Water Temp Range (Cooling) | Down to 5°C (V2) / 8°C (V1) |
| Recommended Pool Volume | 5-15 m³ |
| Optimal Water Flow | 1.7 m³/h (28 LPM) |
| Refrigerant | R32 |
| Compressor Type | Rotary Inverter (GMCC) |
| Noise Level | < 45 dBA |
| IP Rating | IPX4 |
| Plumbing Connections | 1.5″ (unions included) |
| Dimensions (L × W × H) | 498 × 495 × 486 mm (19.6″ × 19.5″ × 19.1″) |
| Weight | 40 kg |
| Installation | Outdoors only |
| Season | All year round |
🔗 Compatibility Guide
Compatible Control Systems
The Clim8zone II Mini requires BP series control systems with “-C8Z” suffix.
| System Code | System Name |
|---|---|
| BP6013G1-C8Z | BP601 3G1 |
| BP6013G2-C8Z | BP601 3G2 |
| BP6013G3-C8Z | BP601 3G3 |
| BP2100G0-C8Z | BP2100 G0 |
| BP2100G1-C8Z | BP2100 G1 |
| BP214PBC-C8Z | BP21P4 BC |
Compatible Topside Panels
| Panel Type | Compatibility | Notes |
|---|---|---|
| spaTouch 3 | ✅ Compatible | Shows Clim8zone icons |
| spaTouch 2 | ✅ Compatible | Full integration |
| spaTouch Mini | ✅ Compatible | Can cover TP600 hole with bezel |
| TP700 | ✅ Compatible | Shows heating/cooling indicators |
| TP740 (Trap/Square/T) | ✅ Compatible | Full indicator support |
Display Indicators
| Indicator | Colour | Meaning |
|---|---|---|
| 🔴 Red | Heating | Clim8zone is heating to reach set temperature |
| 🔵 Blue | Cooling | Clim8zone is cooling to reach set temperature |
| Continuous | Both | eHeater + Clim8zone running together |
⚠️ Important: The popular TP600 series is NOT directly compatible with the Clim8zone II Mini. However, the SpaTouchMini with its bezel can cover a TP600 hole as an upgrade option.
Ice Bath / Chiller Setup
For standalone ice bath or cold plunge use without a Balboa system:
| Component | Product |
|---|---|
| Control System | Joyonway P68B123 |
| Topside Panel | Joyonway PB562 |
💡 Note: The Clim8zone II Mini can function manually as a chiller using its built-in keypad, but the Joyonway system provides a complete, user-friendly ice bath control solution.
Suitable Applications
| Application | Suitability | Notes |
|---|---|---|
| ♨️ Hot Tubs (up to 15m³) | ✅ Ideal | Primary design application |
| ❄️ Ice Baths | ✅ Ideal (V2) | V2 cools to 5°C |
| ❄️ Cold Plunge Pools | ✅ Recommended | Excellent for cold therapy |
| 🛁 Chill Therapy Spas | ✅ Compatible | Including Canadian Spa models |
💚 Energy Efficiency & Savings
Coefficient of Performance (COP)
| Condition | Heating Output | Approximate COP |
|---|---|---|
| @27°C ambient | 4.0 kW | 5-10 |
| @15°C ambient | 2.5 kW | 4-6 |
| Optimal conditions | Up to 4.0 kW | Up to 15 |
Estimated Savings
- Up to 75% reduction in heating costs compared to traditional electric heater
- Variable speed compressor minimises energy consumption at partial load
- Smart algorithm continuously adjusts for maximum efficiency
Real-World Performance
At 27°C ambient temperature, you’ll get approximately 4kW of heating output. At 15°C (more typical UK conditions), expect around 2.5kW of heating capacity.
🎛️ Operating Modes
Temperature Modes
| Mode | Function | Best For |
|---|---|---|
| 🔥 Heat Only | Heats water to set temperature | Winter hot tub use |
| ❄️ Cool Only | Cools water to set temperature (5°C V2 / 8°C V1) | Ice bath therapy, cold plunge |
| 🔄 Heat and Cool (Auto) | Maintains set temperature automatically | Year-round temperature control |
| ⏸️ Disabled | Heat pump switched off | Seasonal shutdown |
Speed Mode
| Mode | Description |
|---|---|
| Auto Smart | AI algorithm automatically adjusts compressor frequency based on conditions for optimal efficiency |
Heater Integration Options (PDF-Confirmed)
| Setting | Description | Display |
|---|---|---|
| Clim8zone Only | Heat pump provides all heating/cooling | Standard icons |
| Electric Heater Only | Traditional spa eHeater operates alone | eHeater icon |
| Both Simultaneously | eHeater + Clim8zone running together | CONTINUOUS indicator |
💡 Tip: Running both the Clim8zone and traditional electric heater together provides the fastest heating times.
🛠️ Installation Requirements
⚠️ IMPORTANT: Installation must be carried out by a qualified professional.
Location Requirements
- ☑️ Outdoor installation only – Never install indoors
- ☑️ Level, stable surface – Concrete slab or platform
- ☑️ Compact footprint – Only 498 × 495 mm required
Electrical Requirements
| Requirement | Specification |
|---|---|
| Supply Voltage | 220-240 V AC |
| Frequency | 50 Hz |
| Maximum Current | 5.5 A |
| RCD Protection | Required (30mA recommended) |
| Earth/Bonding | Mandatory |
Plumbing Requirements
| Requirement | Specification |
|---|---|
| Connection Size | 1.5″ |
| Unions | Included |
| Recommended Flow Rate | 1.7 m³/h (28 LPM) |
Included Accessories
- ✅ 1.5″ pump unions with gaskets
- ✅ Condensation drain fittings
- ✅ Data cable for BP system connection
- ✅ Power cable with connector
⚠️ Safety Warnings
Electrical Safety
- ⚠️ ALWAYS disconnect power before any work
- ⚠️ Installation by qualified professional only
- ⚠️ Ensure correct voltage supply (220-240V in UK)
- ⚠️ Verify RCD protection is installed and working
- ⚠️ Earth bonding connection is mandatory
Operational Safety
- ⚠️ Never operate indoors – outdoor use only
- ⚠️ Keep all air vents unobstructed at all times
- ⚠️ Unit must be stored, transported and installed vertically
Winter/Freeze Protection
- ⚠️ If powering off during freezing conditions, drain all water from the heat pump
- ⚠️ Operating range is -5°C to 43°C ambient – do not operate below -5°C
Warranty Note
- ⚠️ Must be installed by a qualified individual or tradesperson
- ⚠️ Heat pumps opened or installed are exempt from standard returns policy
- ⚠️ Suspected faults must be returned within warranty period for manufacturer inspection
🆚 V1 vs V2 Comparison
| Feature | Clim8zone II Mini V1 | Clim8zone II Mini V2 |
|---|---|---|
| Heating Capacity | 4.0 kW | 4.0 kW |
| Minimum Cooling Temp | 8°C | 5°C |
| Ice Bath Suitable | ⚠️ Limited | ✅ Ideal |
| Cold Plunge Therapy | ✅ Good | ✅ Excellent |
| Hot Tub Use | ✅ Ideal | ✅ Ideal |
💡 Recommendation: For ice bath applications, choose the V2 model which cools down to 5°C.
🎯 Ideal Applications
| Application | Suitability | Notes |
|---|---|---|
| ♨️ Standard Hot Tubs | ✅ Ideal | Spas up to 15m³ volume |
| ❄️ Ice Baths | ✅ Excellent (V2) | Cools to 5°C for cold therapy |
| ❄️ Cold Plunge Pools | ✅ Recommended | Popular for recovery and wellness |
| 🏠 Small Footprint Installations | ✅ Perfect | Compact design fits tight spaces |
| 🔄 Retrofit Upgrades | ⚠️ Check Compatibility | Requires C8Z-compatible system |
This Heat Pump is Designed For:
- Compact hot tub installations where space is limited
- Cold water therapy and ice bath applications
- Energy-efficient spa heating with up to 75% cost savings
- Quiet operation in residential environments
- Year-round temperature control (heating and cooling)
❓ Frequently Asked Questions
Q: What’s the difference between V1 and V2?
A: The V1 cools water down to 8°C, while the V2 reaches 5°C. For ice bath use, the V2 is recommended.
Q: Will it work with my existing Balboa system?
A: Only if your control system ends in “-C8Z”. The popular TP600 topside is NOT directly compatible, but SpaTouchMini with its bezel can cover a TP600 hole as an upgrade option. Check your system part number before ordering.
Q: How much can I save on running costs?
A: With a COP of 5-10, expect up to 75% savings compared to a traditional electric heater.
Q: Is it quiet enough for residential use?
A: Yes, at less than 45 dBA it’s quieter than a typical refrigerator and won’t disturb neighbours.
Q: Can I use it for an ice bath without a Balboa system?
A: Yes, it has a built-in keypad for standalone operation. For a complete ice bath control solution, pair with the Joyonway P68B123 control system and PB562 topside.
Q: What size spa is it suitable for?
A: Recommended for spas with water volumes of 5-15 m³.
Q: Will it work in UK winters?
A: Yes, it operates down to -5°C ambient temperature. For colder conditions, consider the larger Clim8zone I which operates to -20°C.
Q: Do I need a qualified installer?
A: Yes. Professional installation is required for warranty coverage and safety compliance.
📥 Downloads & Resources
📄 Info Sheet – Product specifications and features
🏆 Why Choose Clim8zone II Mini
- ✅ Ultra-compact design – Fits where larger heat pumps won’t
- ✅ Dual functionality – Both heating AND cooling in one unit
- ✅ Ice bath ready (V2) – Cools to 5°C for cold therapy
- ✅ Whisper-quiet operation – Less than 45 dBA
- ✅ Energy efficient – COP of 5-10, up to 75% savings
- ✅ Smart inverter technology – AI-powered efficiency optimisation
- ✅ Lightweight – Only 40 kg for easier handling
- ✅ Balboa integration – Seamless control through existing topside
🤝 Why Buy From Parts4Tubs
- ✅ UK-based company with local support
- ✅ Fast UK delivery
- ✅ Expert technical advice from spa specialists
- ✅ Competitive pricing
- ✅ Full warranty support
- ✅ Easy returns within 30 days
- ✅ Help with compatibility checking
- ✅ Installation guidance available
- ✅ Both V1 and V2 models available
✨ Summary
The Balboa Clim8zone II Mini 4kW Heat Pump delivers exceptional versatility in a compact package. With 4kW heating capacity, cooling down to 5°C (V2), and whisper-quiet operation under 45 dBA, it’s the ideal choice for hot tubs, ice baths, and cold plunge therapy. The intelligent inverter technology provides COP of 5-10, reducing energy costs by up to 75%. Perfect for installations where space is limited or where dual heating and cooling functionality is required.







