🌡️Aquark AquaIntel EPN07 Inverter Heat Pump – 7kW | Professional Pool & Hot Tub Heating
Heat Medium to Large Pools for £1/Day – Save 1000+ kWh per Season! ⚡
The Aquark AquaIntel 7kW Inverter Heat Pump is the professional’s choice for efficient, year-round pool and hot tub heating. Engineered for pools up to 30,000 litres (15-30m³), this powerhouse delivers 40% more heating capacity than the 5kW model while maintaining exceptional efficiency with an average COP of 9.5. Whether you’re heating a family swimming pool, large hot tub, or commercial swim spa, the AquaIntel 7kW delivers spa-perfect water temperature from early spring through late autumn—and even mild winter days.
Revolutionary “Double Energy Saving” Technology: The AquaIntel 7kW saves over 1000 kWh per pool season compared to traditional 13kW On/Off heat pumps. That’s £300-£400 in annual energy savings at current UK electricity rates!
Why upgrade to 7kW? Faster heat-up times, better performance in cooler weather, and the capacity to handle larger water volumes without overworking the system.
🎯 What Makes the AquaIntel 7kW the Professional Choice?
1. Double Energy Saving vs. Traditional Heat Pumps 💰💰
What does “Double Energy Saving” mean?
Traditional On/Off heat pumps work like a light switch—they’re either running at 100% capacity or completely off. This constant cycling wastes enormous amounts of energy through:
- ❌ Repeated start-up power surges
- ❌ Running at full capacity when only 30% is needed
- ❌ Overshooting target temperatures
- ❌ Frequent compressor stress and wear
The AquaIntel Difference:
The Stepless DC Inverter operates like a dimmer switch, running at 20-100% capacity and adjusting in real-time. The system:
- ✅ Runs at optimal 40-60% capacity for 95% of the season
- ✅ Eliminates wasteful on/off cycling
- ✅ Matches output precisely to heating demand
- ✅ Achieves peak efficiency zone continuously
Real-World Savings Example:
| Heating System | Seasonal Energy Use | Annual Cost (£0.30/kWh) | Savings vs AquaIntel |
|---|---|---|---|
| 13kW Traditional On/Off Heat Pump | 3,500 kWh | £1,050 | – |
| 10kW Standard Inverter | 2,800 kWh | £840 | £210/year |
| AquaIntel 7kW (This Model) | 2,500 kWh | £750 | £300/year |
| 3kW Electric Heater | 6,000 kWh | £1,800 | £1,050/year! |
Over 10 years, you’ll save £3,000-£4,000 compared to traditional heat pumps!
2. Intelligent Adaptive Heating 🧠
The AquaIntel’s Professional Pool Heating Control continuously monitors:
- 🌡️ Current water temperature (inlet/outlet)
- 🌤️ Ambient air temperature
- 💨 Environmental conditions (humidity, air pressure)
- 📊 Heating load requirements
- ⏱️ Time of day and usage patterns
Then automatically adjusts:
- Compressor speed: Hertz by hertz (infinitely variable)
- Fan motor speed: Round by round (precise RPM control)
- Refrigerant flow: Via Electronic Expansion Valve (EEV)
- Defrost cycles: Only when actually needed
Result? Perfect temperature 24/7 with zero waste and minimal noise.
3. Professional-Grade Silence Technology 🔇
Noise Specifications:
| Distance | Sound Level | Real-World Comparison |
|---|---|---|
| 1 meter | 39.8 – 51.2 dB(A) | Quiet library to quiet office |
| 10 meters | 19.8 – 31.2 dB(A) | Whisper to rustling leaves |
| Rated (Silence Mode) | 45 dB | Quieter than a refrigerator |
Advanced Noise Reduction Features:
- InverQuark Technology: Patented noise-cancellation system
- DC Brushless Fan Motor: 70% quieter than traditional AC fans
- Stepless Inverter Compressor: Eliminates sudden start-up roar
- Vibration-Dampening Chassis: Prevents noise transmission
- Optimized Airflow Design: Reduces turbulence and whooshing
Perfect for:
- ✅ Residential neighborhoods with noise restrictions
- ✅ Overnight heating without disturbing sleep
- ✅ Poolside entertaining and relaxation
- ✅ Properties with close neighbors
Noise Comparison:
- Traditional heat pump: 55-65 dB (normal conversation)
- Gas pool heater: 60-70 dB (vacuum cleaner)
- AquaIntel 7kW: 45 dB (quiet library) ✅
4. Complete Smart Control with InverGo App 📱
Control Everything from Anywhere:
The built-in WiFi and InverGo smartphone app (iOS & Android) provides:
🎛️ Full Control:
- Power on/off remotely
- Adjust temperature (18-40°C)
- Switch between Boost and Silence modes
- Set daily/weekly heating schedules
- Enable vacation mode
- Activate boost heating before pool party
📊 Monitoring & Analytics:
- Real-time inlet/outlet water temps
- Ambient air temperature
- Current COP efficiency
- Energy consumption tracking (daily/weekly/monthly)
- Compressor speed and fan RPM
- System status indicators
⏰ Smart Scheduling:
- Program heating times for different days
- “Heat before arrival” scenarios
- Night economy mode (lower temps overnight)
- Weekend boost programs
- Seasonal scheduling presets
🌤️ Weather Integration:
- Automatic adjustments based on forecast
- Pre-heating before cold snaps
- Reduced operation during heat waves
- Wind and humidity compensation
👨👩👧👦 Multi-User Access:
- Share control with family members
- Set different user permissions
- Activity logging (who changed what)
- Remote parental controls
🔔 Intelligent Alerts:
- Low water flow warnings
- Temperature alerts
- Maintenance reminders
- Error code notifications with troubleshooting
- Filter cleaning reminders
5. All-Weather Performance ❄️☀️
Operating Temperature Range: -5°C to +43°C
Unlike cheaper heat pumps that struggle in cold weather, the AquaIntel 7kW delivers:
🌸 Spring/Autumn (10-20°C):
- Excellent performance with COP 5-7
- Comfortable heating for extended seasons
- Steady, predictable operation
☀️ Summer (20-35°C):
- Peak efficiency with COP 8-10
- Minimal runtime required
- Ultra-low energy consumption
❄️ Winter (0-10°C):
- Continued reliable operation with COP 4-5
- Automatic intelligent defrost cycles
- Still 4-5× more efficient than electric heating
🌡️ Extreme Heat (35-43°C):
- Safe operation with automatic protection
- Slows down to prevent overheating
- Maintains stable performance
Automatic Defrost System:
- Reverse-cycle defrosting (4-way valve technology)
- Initiates only when sensors detect ice buildup
- Completes in 5-10 minutes
- Resumes heating immediately
- No manual intervention required
📋 Complete Technical Specifications
| Specification | EPN07 / SW70 7kW Model |
|---|---|
| Model Code | EPN07 / SW70 |
| Ideal Pool Size | 15-30 m³ (15,000-30,000 litres) |
| Ideal For | Medium/large pools, hot tubs, swim spas |
| Operating Seasons | All year round |
| Installation Type | Outdoor only (well-ventilated area) |
| Dimensions (W × D × H) | 903 × 349 × 654 mm |
| Weight | 43 kg |
| Pipe Connection | 50mm (48.3mm actual) |
| Sound Level (Rated) | 45 dB @ 1m |
| Noise Range @ 1m | 39.8 – 51.2 dB(A) (varies with load) |
| Noise Range @ 10m | 19.8 – 31.2 dB(A) (barely audible!) |
| Power Supply | 220-240V / 50Hz Single Phase |
| Rated Current Range | 1.17 ~ 6.48A |
| Recommended Water Flow | 2-4 m³/hour |
| Power Cable Size | 3 × 1.5mm² (for runs ≤10m) |
| Refrigerant Type | R32 (Eco-friendly, low GWP) |
| Heat Exchanger | Twisted Titanium (corrosion-proof) |
| Expansion Valve | EEV (Electronic Expansion Valve) |
| Defrost System | 4-way valve reverse-cycle |
Performance Data
⚡ Optimal Conditions (Air 27°C / Water 27°C / 80% Humidity):
- 🔥 Heating Capacity: 7.0 kW
- ⚡ COP Range: 10.1 – 6.0
- 🎯 Average COP @ 50% Speed: 9.0 (Exceptional!)
- 💰 Running Cost: ~£0.23/hour @ £0.30/kWh
🍂 Cooler Conditions (Air 15°C / Water 26°C / 70% Humidity):
- 🔥 Heating Capacity: 5.0 kW
- ⚡ COP Range: 6.3 – 4.3
- 🎯 Average COP @ 50% Speed: 6.3
- 💰 Running Cost: ~£0.30/hour @ £0.30/kWh
Temperature Settings: 18°C – 40°C
- Swimming pools: 26-28°C recommended
- Hot tubs: 36-40°C
- Exercise pools: 28-30°C
- Children’s pools: 30-32°C
💡 Key Features & Benefits
🎚️ Dual Operating Modes
🚀 BOOST MODE (20-100% Capacity):
- When to use:
- Initial heat-up from cold
- Cold weather days (below 10°C)
- Pool party preparation
- After heavy rain (temperature drop)
- Quick recovery after pool cleaning
- Benefits:
- Maximum heating speed
- Full system capacity available
- Intelligent optimization still active
- Auto-switches to Silence when target reached
- Typical heat-up: 20,000L pool from 18°C to 28°C
- With cover: 24-30 hours
- Without cover: 36-48 hours
🤫 SILENCE MODE (20-80% Capacity):
- When to use:
- Temperature maintenance (most common)
- Overnight operation
- Noise-sensitive times
- Residential areas
- When neighbors are home
- Benefits:
- 3-5 dB quieter than Boost
- Extended component lifespan
- Lower peak electricity draw
- Optimal efficiency zone (50-60% capacity)
- Typical maintenance: 20,000L pool at 28°C
- Summer (25°C air): 2-4 hours/day
- Spring/Autumn (15°C air): 6-9 hours/day
- Mild winter (8°C air): 14-18 hours/day
🏗️ Premium Construction & Components
Twisted Titanium Heat Exchanger:
- ✅ 100% corrosion-resistant (salt water, chemicals)
- ✅ Superior heat transfer efficiency
- ✅ Extended lifespan (15+ years typical)
- ✅ Self-cleaning flow design
- ✅ Freeze-damage resistant
Aluminum Alloy Cabinet:
- ✅ Rust-proof marine-grade construction
- ✅ UV-resistant powder coating
- ✅ Weatherproof in all climates
- ✅ Easy-access service panels
- ✅ Integrated condensate drainage
Advanced Technology Components:
- EEV (Electronic Expansion Valve): Precise refrigerant control for maximum efficiency
- 4-Way Valve: Enables reverse-cycle defrosting
- DC Inverter Compressor: Variable speed, soft-start, ultra-efficient
- DC Brushless Fan Motor: Whisper-quiet, long-lasting, variable speed
- Intelligent Control Board: Self-diagnosing with 25+ error codes
🛡️ Comprehensive Safety Features
Automatic Protection Systems:
- ⚡ High/low voltage protection (180-260V tolerance)
- 🌊 Water flow sensor (E3 protection)
- 🌡️ Temperature differential monitoring (E6)
- 🔥 High-pressure protection (E1)
- ❄️ Low-pressure protection (E2)
- 🌡️ Outlet water temp protection (E7)
- 🔥 Compressor overheat protection (E8)
- 🧊 Evaporator overheat protection (EA)
- ❄️ Anti-freeze protection (Ed)
Built-in Diagnostics:
- 25+ error codes with specific descriptions
- Sensor failure detection (P0-P9)
- Component failure alerts (F1-F9)
- On-screen error display
- App notifications with troubleshooting guides
🌍 Environmental Excellence
R32 Refrigerant Benefits:
- 🌱 75% lower GWP than R410A (old standard)
- ♻️ Highly recyclable and reclaimed
- ⚡ More energy-efficient heat transfer
- 🔒 Safe for residential applications
- 🌍 EU F-Gas regulation compliant
- 🔋 Requires 20% less refrigerant charge
Carbon Footprint Reduction:
- Using renewable air energy = 6-9× less CO₂ than gas/oil heating
- Annual CO₂ savings: 1.5-2.0 tonnes vs traditional heating
- 10-year environmental impact: Equivalent to planting 30-40 trees
- Supports UK Net Zero 2050 targets
Energy Efficiency Ratings:
- Average COP: 9.0 (900% efficiency!)
- Seasonal COP: 6.5-7.5 (real-world conditions)
- Energy class: A+++ (when available)
- Qualifies for renewable heat incentives (check eligibility)
🏊 Pool Size Guide: Which Model Do You Need?
Is 7kW Right for Your Pool?
✅ Perfect for 7kW (This Model):
- Pools: 15,000 – 30,000 litres (15-30m³)
- Typical dimensions: 4m × 3m × 1.5m deep
- Large hot tubs: 2,000-3,500 litres
- Swim spas: 12-20 feet long
- Plunge pools: 3m × 2m
- Exercise pools: Medium size
Example Pool Dimensions:
- 5m × 3m × 1.2m = 18,000L ✅ Perfect for 7kW
- 6m × 4m × 1.5m = 36,000L ❌ Consider 9kW or 13kW model
- 4m × 2.5m × 1.3m = 13,000L ✅ 7kW works, or 5kW for slower heating
5kW vs 7kW vs 9kW Comparison
| Feature | 5kW (SW50) | 7kW (SW70) ⭐ | 9kW (SW90) |
|---|---|---|---|
| Pool Size | 5-20m³ | 15-30m³ | 20-45m³ |
| Heat Output @ 27°C | 5.0 kW | 7.0 kW | 8.8 kW |
| Heat Output @ 15°C | 3.5 kW | 5.0 kW | 6.4 kW |
| Average COP | 9.1 | 9.0 | 8.9 |
| Noise Level | 43 dB | 45 dB | 47 dB |
| Weight | 33 kg | 43 kg | 48 kg |
| Dimensions (L) | 682mm | 903mm | 1023mm |
| Best For | Small pools, hot tubs | Medium pools | Large pools |
| Heat-up Speed | Slower | Balanced | Fastest |
| Running Costs | Lowest | Medium | Higher |
🎯 General Sizing Rule:
- Pool volume ÷ 3 = Minimum kW needed for reasonable heat-up times
- Example: 21,000L pool ÷ 3 = 7kW minimum ✅
When to upgrade to 7kW (vs 5kW):
- ✅ Pool over 15,000 litres
- ✅ Located in cooler climate (Scotland, North England)
- ✅ Frequently used in spring/autumn (extended season)
- ✅ Want faster heat-up times
- ✅ Pool doesn’t have a cover
- ✅ Pool exposed to wind
- ✅ Prefer running system at 40-60% capacity (optimal efficiency)
When 5kW is sufficient:
- Pool under 15,000 litres
- Excellent insulation and pool cover
- Mild climate (South England)
- Summer-only use
- Patient with heat-up times
- Tightest budget
🔧 Installation & Setup
What’s Included in the Box:
✅ AquaIntel EPN07 7kW heat pump unit ✅ Condensate drainage kit with fittings ✅ Comprehensive 25-page user manual ✅ WiFi setup and InverGo app guide ✅ Installation template and mounting guide ✅ Warranty registration card ✅ Electrical wiring diagram ✅ Troubleshooting quick reference card
You’ll Need to Purchase Separately:
🛒 Essential:
- 💧 Water circulation pump (2-4 m³/hour, max lift ≥10m)
- 🔌 RCD circuit breaker (30mA, 9.5A rated minimum)
- 🔧 50mm hard water pipes (PVC or ABS)
- ⚡ Electrical cable (3×1.5mm² for ≤10m runs, 3×2.5mm² for longer)
- 🏗️ Mounting base (concrete pad or anti-vib brackets with M10 bolts)
- 🔩 Plumbing unions, valves, bypass kit
🛒 Highly Recommended:
- 🌡️ Pool cover (reduces heating costs 40-50%!)
- ⏱️ Timer for pump automation
- 📊 Digital pool thermometer
- 🛡️ Additional water flow sensor
- 🧰 Insulated pipe wrapping
- 🔧 Bypass valve kit (for easy maintenance)
Installation Requirements:
📏 Location & Space:
- Outdoor installation only (never indoors or in garage!)
- Minimum clearances:
- 50cm behind unit (airflow critical)
- 30cm on sides
- 1m in front (service access)
- Level, stable surface (concrete or anti-vibration pads)
- Protected from direct sun if possible (improves efficiency)
- Good drainage for condensate water
⚡ Electrical:
- Dedicated 230V 50Hz circuit
- RCD breaker (30mA residual current, 9.5A minimum)
- 3×1.5mm² cable (≤10m) or 3×2.5mm² (10-20m)
- Proper earthing/grounding essential
- Fuse: 9.5A minimum
- Voltage tolerance: 180-260V (built-in protection)
💧 Plumbing:
- 50mm pipe connections (48.3mm actual fitting)
- Hard pipes only (soft hoses can’t support weight)
- Maximum pipe run: 10m from pool
- Water flow: 2-4 m³/hour required
- Bypass valve kit recommended
- Union fittings for easy removal
- Insulation on pipes (heat loss prevention)
⚠️ Critical Installation Rules:
- “Start Pump BEFORE Heat Pump” – Always!
- “Stop Heat Pump BEFORE Pump” – Every time!
- Never run heat pump without water flow (damage occurs)
- Must perform leak test after installation
- Check water flow rate meets 2-4 m³/h requirement
Professional Installation Includes:
✅ Site survey and optimal placement ✅ Electrical connection with RCD protection ✅ Plumbing integration and bypass valve ✅ Pressure and leak testing ✅ WiFi configuration and app setup ✅ System commissioning and performance testing ✅ Customer training and handover ✅ Warranty activation ✅ 12-month service reminder
Installation Time: 3-6 hours for experienced installer
DIY Installation: Not recommended unless you have:
- Electrical qualification (Part P compliance)
- Plumbing experience
- Refrigeration knowledge (for troubleshooting)
- Understanding that DIY typically voids warranty
💰 Running Costs & Savings Calculator
Real-World Cost Examples (Based on £0.30/kWh UK average 2024)
📊 25,000 Litre Pool – Daily Maintenance Costs:
| Season | Air Temp | Runtime | Daily Cost | Monthly Cost |
|---|---|---|---|---|
| High Summer | 25-30°C | 1-2 hrs | £0.30-£0.60 | £9-£18 |
| Late Summer | 20-25°C | 3-5 hrs | £0.90-£1.50 | £27-£45 |
| Spring/Autumn | 15-20°C | 6-9 hrs | £1.80-£2.70 | £54-£81 |
| Mild Winter | 8-15°C | 12-16 hrs | £3.60-£4.80 | £108-£144 |
With good pool cover: Reduce runtime and costs by 40-50%!
Annual Cost Comparison (6-month season, 25,000L pool)
| Heating Type | Annual Energy | Annual Cost | vs AquaIntel 7kW |
|---|---|---|---|
| Gas Pool Heater | – | £1,800-£2,500 | £1,200 more |
| 3kW Electric Heater | 6,500 kWh | £1,950 | £1,350 more |
| 13kW On/Off Heat Pump | 3,500 kWh | £1,050 | £300 more |
| AquaIntel 7kW ⭐ | 2,500 kWh | £750 | Best value! |
Payback Period Calculator
Example: Upgrading from 3kW electric heater:
- AquaIntel 7kW cost: ~£2,000
- Annual savings: £1,200
- Payback period: 1.7 years ✅
- 10-year savings: £12,000+
Example: Upgrading from 13kW traditional heat pump:
- Price difference: ~£300-£500
- Annual savings: £300
- Payback period: 1-1.7 years ✅
- 10-year savings: £3,000+
Energy Savings Breakdown
Why the AquaIntel saves 1000+ kWh per season:
- Inverter Efficiency: Runs at 40-60% capacity (optimal zone)
- Savings vs On/Off: 400-600 kWh ✅
- Eliminates Start-Up Waste: No repeated power surges
- Savings vs On/Off: 200-300 kWh ✅
- Prevents Overshooting: Precise temperature control
- Savings vs On/Off: 150-250 kWh ✅
- Adaptive Operation: Adjusts to conditions in real-time
- Savings vs On/Off: 250-350 kWh ✅
Total: 1000-1500 kWh per 6-month season!
📱 InverGo App – Complete Feature Guide
Setup & Pairing (5 minutes)
- Download App:
- iOS: App Store → Search “InverGo”
- Android: Google Play → Search “InverGo”
- Create Account:
- Register with email or social account (Google/Facebook)
- Set family name and location
- Accept terms
- Pair Device:
- Method 1 – Bluetooth (Recommended):
- Enable phone Bluetooth
- Press WiFi button for 3 seconds on heat pump
- Click “Add Device” in app
- Follow on-screen instructions
- Enter WiFi password when prompted
- Method 2 – Manual WiFi:
- Connect phone to home WiFi
- Press WiFi button for 3 seconds on heat pump
- App searches for device
- Enter WiFi credentials
- Method 1 – Bluetooth (Recommended):
- Confirmation:
- WiFi icon on heat pump stops flashing (solid light)
- Device appears in app
- Test by changing temperature
Main App Functions
🎛️ Control Panel:
- Power: On/Off toggle
- Mode Selection: Boost / Silence
- Temperature: Slide or type (18-40°C)
- °C/°F Switch: Tap to toggle
- Current Status: Inlet temp, outlet temp, ambient air
📊 Monitoring Dashboard:
- Real-time temperatures (3 sensors)
- Current COP efficiency
- Compressor speed (RPM/Hz)
- Fan speed (RPM)
- Power consumption (kW current draw)
- Daily/weekly/monthly energy usage graphs
⏰ Smart Scheduling:
- Daily Schedules: Set different temps for morning/afternoon/evening/night
- Weekly Programs: Different schedules for weekdays/weekends
- Vacation Mode: Maintain minimum temp when away
- Quick Presets:
- “Weekend Boost” – Heat to 30°C Fri-Sun
- “Economy Night” – Drop to 24°C overnight
- “Party Mode” – Max heat before event
🌤️ Weather Integration:
- 7-day forecast display
- Automatic compensation (heats more before cold spell)
- Wind speed factor (increases heating on windy days)
- Humidity display
- Suggested adjustments based on forecast
🔔 Notifications & Alerts:
- Temperature reached alerts
- Low water flow warnings (E3 error)
- Maintenance reminders (filter cleaning, annual service)
- Error codes with troubleshooting steps
- Filter reminder (every 2-4 weeks)
- Software update available
👨👩👧👦 Family Sharing:
- Invite family members via email
- Set permissions (full control / monitoring only)
- Activity log (who changed settings when)
- Guest access (temporary, limited)
📈 Advanced Features:
- COP efficiency history graphs
- Cost calculator (enter your kWh rate)
- Heat-up time estimator
- Seasonal energy reports
- Compare week-by-week usage
- Export data (CSV)
❓ Frequently Asked Questions
Q: Is 7kW too much for my 18,000L pool?
A: No! The 7kW model is perfect for 15-30,000L pools. With inverter technology, it will simply run at a lower capacity (40-60%) which is actually the most efficient operating zone. A 5kW model would run at 80-100% capacity constantly, working harder and using more energy proportionally.
Analogy: It’s like driving a car—cruising at 50mph in 5th gear uses less fuel per mile than revving at 50mph in 3rd gear. The 7kW model “cruises” while the 5kW would “rev.”
Q: What’s the difference between EPN07 and SW70?
A: They’re the same unit! EPN07 is the European model designation, SW70 is the series name. Some retailers use one code, some use the other. All specifications are identical.
Q: How long to heat my pool from cold?
20,000L pool (cold start 15°C → 28°C = 13°C rise):
| Conditions | With Cover | Without Cover |
|---|---|---|
| Summer (25°C air) | 20-26 hours | 32-42 hours |
| Spring (18°C air) | 28-36 hours | 45-60 hours |
| Cooler (12°C air) | 40-52 hours | 65-85 hours |
Tips for faster heating: ✅ Use a pool cover (40% faster!) ✅ Start in Boost mode ✅ Heat during warmest part of day (2pm-6pm) ✅ Ensure good water circulation ✅ Clean filters before heating
Q: Can I heat my pool in winter?
A: Yes, down to -5°C air temperature, but with important considerations:
✅ Works well (5-15°C air):
- COP: 4.5-6.3
- Still cost-effective
- Reliable operation
- Good for year-round hot tubs
⚠️ Limited performance (0-5°C air):
- COP: 3.5-4.5
- Slower heating
- More defrost cycles
- Consider supplemental heating for pools
❄️ Extreme cold (-5-0°C air):
- COP: 2.5-3.5
- Very slow heating
- Frequent defrosting
- Better for maintaining temperature than heating from cold
- Hot tubs work better than pools (smaller volume)
Winter heating recommendations:
- Maintain temperature rather than cold starts
- Use excellent insulation and cover
- Consider “hibernate” mode (minimum temp)
- Supplement with electric heater for cold snaps
- Better suited for hot tubs than large pools
Q: 7kW vs 9kW – which should I choose?
Choose 7kW if:
- ✅ Pool 15-28,000 litres
- ✅ Budget-conscious
- ✅ Prefer quieter operation (45dB vs 47dB)
- ✅ Smaller installation space
- ✅ Milder climate (South UK)
- ✅ Good pool cover and insulation
Upgrade to 9kW if:
- ⬆️ Pool 28-45,000 litres
- ⬆️ Colder climate (Scotland, North England)
- ⬆️ No pool cover (higher heat loss)
- ⬆️ Frequently use in spring/autumn
- ⬆️ Want fastest possible heat-up
- ⬆️ Pool very exposed (windy location)
For 25,000L pool (borderline between 7kW and 9kW):
- With cover + mild climate = 7kW perfect ✅
- No cover + exposed/cold = 9kW better ⬆️
Q: What maintenance is required?
Monthly (5 minutes):
- ✓ Check for debris around air intake/outlet
- ✓ Verify condensate drainage clear
- ✓ Visual inspection for damage
- ✓ Check pool pump pre-filter
Quarterly (15 minutes):
- ✓ Check electrical connections (power off first!)
- ✓ Verify mounting bolts tight
- ✓ Inspect pipes for leaks
- ✓ Test bypass valves
- ✓ Review error log in app
Annually (1 hour or professional service):
- ✓ Clean air filters (if accessible)
- ✓ Check refrigerant pressure (professional)
- ✓ Inspect heat exchanger for scale
- ✓ Test all safety sensors
- ✓ Verify water flow rate
- ✓ Check electrical current draw
- ✓ Update firmware if available
Winter Shutdown (for seasonal pools):
- Turn off and disconnect power
- CRITICAL: Drain all water from heat exchanger
- Unscrew inlet union
- Let water drain completely
- Blow out with compressed air if available
- Cover unit with weatherproof cover
- Close bypass valves
Spring Startup:
- Remove cover
- Visual inspection
- Reconnect plumbing (check all unions tight)
- Check for leaks (run pump, inspect connections)
- Power on and test
- Reconfigure WiFi if needed
Professional Service: Recommended every 2-3 years (£80-£150)
Q: What’s the warranty?
A: Standard Aquark warranty typically includes:
- Compressor: 3-5 years (component only)
- Parts: 2 years (parts only)
- Heat Exchanger: 3 years (titanium corrosion)
- Labour: 1 year (if professional installation)
Warranty requires: ✅ Professional installation with certification ✅ Registration within 30 days of purchase ✅ Annual maintenance (keep records!) ✅ Used within specifications (correct pool size) ✅ Proper winterization if applicable
Warranty VOID if: ❌ DIY installation (no certificate) ❌ Incorrect electrical connection (wrong voltage) ❌ Freeze damage (failed to drain in winter) ❌ Chemical damage (water chemistry negligence) ❌ Physical damage (impact, dropped) ❌ Unauthorized repairs or modifications
Check with Parts4Tubs for current specific warranty terms.
Q: How loud is 45 dB really?
Sound Level Comparisons:
- 30 dB = Whisper, watch ticking
- 40 dB = Quiet library, refrigerator
- 45 dB = AquaIntel 7kW (Quiet office) ⭐
- 50 dB = Rainfall, dishwasher
- 60 dB = Normal conversation
- 70 dB = Washing machine, vacuum
At 10 meters distance: 19.8-31.2 dB (whisper/rustling leaves!)
Real-world test:
- At 1m in Silence mode: Quieter than most refrigerators
- At 5m: Barely noticeable over ambient garden sounds
- At 10m: Almost inaudible unless very quiet environment
- Through window: Not noticeable indoors
Noise factors:
- Boost mode: ~2-3 dB louder than Silence
- Cold start: Brief fan ramp-up (30 seconds)
- Defrost cycle: No louder than normal operation
- Mounting: Anti-vibration pads reduce by 2-3 dB
- Surroundings: Fences/walls can reflect sound
Q: Can I use this with my hot tub?
A: Absolutely! The 7kW is excellent for hot tubs:
✅ Ideal for hot tubs up to 3,500 litres:
- 6-person hot tub: 2,000-2,500L ✅ Perfect
- 7-8 person luxury spa: 2,500-3,000L ✅ Great
- Small swim spa: 3,000-3,500L ✅ Good
Hot tub advantages:
- Smaller volume = faster heat-up
- Better insulation = lower running costs
- Higher target temp (38-40°C) = system runs efficiently
- Year-round use = better ROI
- Covered when not in use = minimal heat loss
Installation considerations:
- Most hot tubs have built-in heater (can supplement or replace)
- Plumbing bypass required to add heat pump
- Some hot tubs have dedicated heat pump connection
- Professional installation recommended for integration
Running costs for 2,500L hot tub:
- Summer: £0.40-£0.80/day
- Winter: £1.50-£3.00/day
- Annual total: £300-£600 vs £1,200-£2,000 with standard heater
- Savings: £600-£1,400/year! ✅
Q: What if I have hard water / high calcium?
A: The twisted titanium heat exchanger is highly resistant to scale buildup, but preventive measures help:
✅ Recommended:
- Test water hardness (calcium/magnesium levels)
- Use scale inhibitor chemicals in pool
- Clean heat exchanger annually (professional acid wash)
- Maintain proper water chemistry (pH 7.2-7.6)
- Consider water softener for very hard water (>400 ppm)
Signs of scale buildup:
- Reduced heating efficiency
- Longer heat-up times
- E6 error (temp differential too high)
- Unusual noises (rumbling)
- Higher than normal COP degradation
Prevention is easier than cure! Budget £80-£120 for annual professional descaling in very hard water areas.
Q: Can I install this myself to save money?
A: Not recommended for several important reasons:
❌ Why DIY is problematic:
- Warranty void – Most warranties require professional installation certificate
- Electrical regulations – Part P compliance required in UK (legal requirement)
- Refrigerant safety – R32 is flammable in high concentrations (requires training)
- Insurance – Home insurance may be invalidated by DIY electrical work
- Complexity – Water flow sensors, electrical protection, leak testing
- Liability – Any damage or injury becomes your responsibility
✅ What you CAN do yourself:
- Prepare concrete base
- Plan placement location
- Run conduit for cables (electrician pulls wires)
- Pre-plumb part of pipe run (licensed plumber connects unit)
- Setup WiFi and app (after professional commissioning)
Professional installation cost: £300-£600
- Worth it for peace of mind, warranty protection, insurance coverage
If you MUST DIY (not recommended):
- Must have electrical certification (Part P)
- Must have refrigeration handling certificate (F-Gas)
- Must have public liability insurance
- Must understand warranty implications
- Must follow manual exactly
- Must perform leak tests properly
Q: What’s the lifespan / how long will it last?
Expected Lifespan:
- Compressor: 10-15 years (inverter compressors last longer than fixed-speed)
- Heat Exchanger: 15-20+ years (titanium virtually corrosion-proof)
- Fan Motor: 10-15 years
- Control Board: 8-12 years
- Overall Unit: 12-18 years with proper maintenance
Factors affecting lifespan: ✅ Increases lifespan:
- Professional installation
- Annual maintenance
- Running in Silence mode (60-80% of time)
- Using pool cover (reduces runtime)
- Proper water chemistry
- Good air circulation (clean intake)
- Protection from elements (cover when not in use seasonally)
❌ Decreases lifespan:
- DIY installation issues
- Neglected maintenance
- Constant Boost mode operation
- Freeze damage (not drained in winter)
- Chemical exposure (poor water chemistry)
- Poor ventilation (blocked airflow)
- Running undersized for pool (constant 100% operation)
Cost of ownership over 15 years:
- Heat pump: ~£2,000
- Maintenance: ~£1,200 (£80/year)
- Possible repairs: ~£500 (average)
- Total: £3,700
Compare to electric heating costs:
- 15 years × £1,200/year excess cost = £18,000 more!
- Net savings: £14,300 over lifespan ✅
🌍 Environmental Impact & Sustainability
Carbon Footprint Comparison (Annual, 25,000L pool, 6-month season)
| Heating Type | CO₂ Emissions | vs AquaIntel |
|---|---|---|
| Natural Gas Heater | 2,800 kg CO₂ | 6× worse |
| Oil Heater | 3,200 kg CO₂ | 7× worse |
| Electric Heater (3kW) | 1,950 kg CO₂ | 4× worse |
| Traditional Heat Pump | 1,050 kg CO₂ | 2× worse |
| AquaIntel 7kW | 475 kg CO₂ | Best! ✅ |
| Solar Only (ideal) | 0 kg CO₂ | – |
Your environmental savings:
- 1.5-2.0 tonnes CO₂ saved per year vs traditional heating
- Over 15 years: 22-30 tonnes CO₂ prevented
- Equivalent to: Planting 30-40 mature trees
- Or: Driving 90,000 miles eliminated
R32 Refrigerant: The Eco-Friendly Choice
Why R32 is superior:
- 🌱 GWP (Global Warming Potential): 675
- vs R410A: 2,088 (old standard) = 68% lower!
- vs R22: 1,810 (banned) = 63% lower!
- ♻️ Single-component refrigerant (easier to recycle)
- ⚡ Better thermodynamic properties (more efficient heat transfer)
- 🔋 Requires 20% less refrigerant charge
- 🔒 Mildly flammable (A2L class) but safe with proper installation
- 🌍 EU F-Gas compliant (future-proof)
Safety notes:
- A2L classification = “Lower flammability” (safer than propane/butane)
- Requires minimum 4m² room if installed indoors (but must be outdoor anyway)
- Auto-shutoff if leak detected
- Professional installation ensures all safety standards met
Renewable Energy Integration
Perfect pairing with solar panels:
- Run heat pump during peak solar generation (11am-4pm)
- Use app scheduling to maximize solar usage
- Excess solar → Free pool heating!
- Smart scheduling reduces grid electricity draw
- Battery storage → Even better optimization
Example savings with solar:
- Standard cost: £750/year
- With solar offset (50%): £375/year
- Total savings: £375 electricity + £1,200 vs traditional = £1,575/year!
Qualifies for Green Incentives (Check current eligibility)
Potential schemes:
- Boiler Upgrade Scheme (BUS) – Currently for home heating, but pool heat pumps may qualify in future
- Renewable Heat Incentive (RHI) – Check if hot tub heating qualifies in your area
- Local council green grants
- Energy company rebates (check with your provider)
- VAT reduction (5% vs 20% for energy-saving products)
Always verify current eligibility and application processes.
📥 Download Resources
📄 Official Documentation:
Download Complete AquaIntel User Manual (PDF)
Includes:
- ✅ Complete technical specifications (all models)
- ✅ Detailed installation instructions with diagrams
- ✅ Electrical wiring schematics
- ✅ WiFi setup guide (InverGo app)
- ✅ Operation and control instructions
- ✅ Maintenance schedule and procedures
- ✅ Complete troubleshooting guide (25+ error codes)
- ✅ Water pump connection diagrams
- ✅ Safety precautions and warnings
- ✅ Defrost operation explanation
- ✅ Warranty information
- ✅ Specifications for all AquaIntel models (SW50-SW240)
🏆 Why Buy from Parts4Tubs?
✅ Authorized Aquark Dealer
- Genuine products with full manufacturer warranty
- Factory-trained support team
- Direct manufacturer relationship
✅ Expert Knowledge
- 10+ years heating pools, hot tubs, and spas
- Technical support available pre- and post-purchase
- Honest sizing advice (we won’t oversell!)
✅ Competitive Pricing
- Best value without compromising quality
- Price match promise (terms apply)
- Regular promotions and bundles
✅ Fast UK Delivery
- Quick dispatch from UK warehouse
- Tracked courier service
- Carefully packaged for safe arrival
✅ Installation Support
- Professional installation available (quote on request)
- Network of certified installers nationwide
- DIY guidance (though we recommend professional installation)
- Video call support for troubleshooting
✅ After-Sales Excellence
- Dedicated customer service team
- Spare parts availability
- Warranty claim assistance
- Ongoing technical support
✅ Complete Solutions
- Water pumps and accessories in stock
- Plumbing components available
- Chemical and maintenance products
- Pool covers and insulation
🚀 Ready to Transform Your Pool Heating?
The Aquark AquaIntel 7kW delivers:
⚡ 95% Energy Savings – COP 9.0 average efficiency 💰 £300-£400 Annual Savings – Save 1000+ kWh per season 🔇 Ultra-Quiet 45dB – Quieter than a refrigerator 📱 Complete Smart Control – InverGo app for iOS/Android 🌡️ Year-Round Heating – Works -5°C to +43°C 🏊 Perfect for 15-30m³ Pools – 15,000-30,000 litres 🌍 Eco-Friendly R32 – 75% lower environmental impact 🏗️ Professional Build Quality – Titanium heat exchanger, 12-15 year lifespan 🛡️ Comprehensive Safety – 25+ protection systems ⏱️ Fast Heat-Up – 40% more capacity than 5kW model
Stop wasting money on expensive, inefficient heating!
Upgrade to intelligent, whisper-quiet pool heating that pays for itself in 1-2 years and saves you thousands over its lifetime.






