🌊 Inverter+ 20.5kW Commercial Pool Heat Pump – Ultra-Quiet, Smart WiFi Control (IPHR55)

Transform your large pool into a year-round swimming paradise with the flagship Inverter+ 20.5kW Heat Pump. This commercial-grade powerhouse combines cutting-edge Full-Inverter technology with remarkable energy efficiency, delivering up to 50% running cost savings while operating 10 times quieter than traditional heat pumps. Perfect for pools between 50-95m³, this premium system features integrated WiFi control, allowing you to manage your pool temperature from anywhere using your smartphone.

Smart Investment for Large Pools If you’re heating a substantial residential pool or managing a commercial facility, the Inverter+ 20.5kW represents the sweet spot between power and efficiency. Unlike fixed-speed heat pumps that run at 100% capacity constantly, this intelligent system adapts its output to match your actual heating needs—delivering full power for rapid warm-up, then smoothly transitioning to efficient maintenance heating at approximately 50% capacity.

Real-World Savings Cutting your pool heating costs by up to 50% isn’t just marketing speak—it’s the result of sophisticated twin-rotary DC compressor technology that eliminates the energy waste inherent in traditional on/off cycling. Over a typical swimming season, this efficiency advantage translates to hundreds of pounds in saved electricity costs while extending your comfortable swimming months.

Surprisingly Peaceful Operation Despite packing 20.5kW of heating power, this unit operates at whisper-quiet levels that won’t disturb your poolside relaxation or upset neighbors. The advanced inverter technology virtually eliminates vibrations, while variable-speed operation means the system runs at reduced speeds during maintenance heating—making noise levels nearly imperceptible.

🎯 Key Features & Benefits

🔄 Full-Inverter Technology with Twin-Rotary DC Compressors Revolutionary variable-speed operation that continuously adjusts power output from 20% to 100% capacity, matching real-time heating demands for optimal efficiency under all conditions.

📱 Integrated WiFi & Smart App Control Monitor and control your pool temperature remotely, create custom heating schedules, track energy consumption, receive maintenance alerts, and make adjustments from anywhere—all through an intuitive smartphone app.

🔇 Ultra-Quiet Operation (10x Quieter) Advanced twin-rotary compressor design minimizes vibrations and noise to approximately 10 times quieter than conventional heat pumps, with sound levels from 40.9-54.2 dB(A) at 1 meter.

💪 Commercial-Grade Titanium Heat Exchanger Industrial-quality spiral titanium tube heat exchanger provides superior corrosion resistance against pool chemicals and salt water, ensuring long-term reliability in demanding applications.

⚡ Soft-Start Technology Eliminates electrical demand spikes when starting up, protecting your electrical system while enabling smooth, efficient operation with gradual power ramp-up.

🌍 Eco-Friendly R32 Refrigerant Environmentally responsible refrigerant with lower global warming potential compared to older refrigerants, reducing your carbon footprint while maintaining excellent heating performance.

❄️ Extended Operating Range (-10°C to 43°C) Operates efficiently across a wide ambient temperature range, enabling extended swimming season even in cooler climates with consistent performance.

🎛️ Two Operating Modes

• Smart Mode: Intelligent optimization with 20-100% capacity range for fastest heating
• Silence Mode: Ultra-quiet operation at 20-80% capacity, 3dB(A) quieter—perfect for nighttime use

📄 Downloads & Documentation

Complete Installation & User Manual Everything you need for installation, operation, and maintenance of your Inverter+ heat pump.

📥 Download USER-INSTALLATION-MANUAL-FAIRLAND-Inverter-Plus.pdf (opens in new tab)

What’s included in the manual:

• Comprehensive installation instructions with wiring diagrams
• Complete technical specifications table
• WiFi setup and app pairing guide
• Operating instructions for Smart and Silence modes
• Maintenance schedules and winterization procedures
• Troubleshooting guide with error code reference
• Safety requirements and operational guidelines

📊 Technical Specifications

Performance Data

Specification	Details
Model	Inverter+ 20.5kW – IPHR55
Heating Capacity	21.7kW (at 28°C air / 26°C water)
Recommended Pool Volume	50-95 m³ (11,000-21,000 gallons)
Power Supply	230V / 1 Phase / 50Hz
Operating Temperature Range	-10°C to 43°C ambient air
Water Temperature Setting Range	18°C to 40°C
Heating Capacity Range	20% to 100% (variable)

Energy Efficiency Ratings

Test Condition	Heating Output	COP (Efficiency)	Input Power
Optimal (28°C air / 26°C water)	21.7kW	16.2 – 6.4	0.36-3.18kW
At 50% Capacity	~10.9kW	11.3	~1.8kW
Typical UK (15°C air / 26°C water)	14.0kW	7.7 – 4.4	0.36-3.18kW
At 50% Capacity	~7.0kW	6.3	~1.6kW

💡 What COP Means: A COP (Coefficient of Performance) of 6.3 means the heat pump produces 6.3kW of heat for every 1kW of electricity consumed—over 600% efficiency!

Physical & Connection Specifications

Feature	Specification
Compressor Type	Twin-Rotary Mitsubishi DC Inverter
Heat Exchanger	Spiral Titanium Tube in PVC
Refrigerant	R32 (500g charge)
Refrigerant GWP	675
CO₂ Equivalent	0.810 tonnes
Casing Material	Aluminum Alloy (corrosion resistant)
Water Connection Size	50mm (2 inch)
Recommended Water Flow	8-10 m³/hour
Dimensions (L×W×H)	954 × 429 × 755 mm
Net Weight	68 kg

Acoustic Performance

Measurement Distance	Sound Level Range
At 1 meter	40.9 – 54.2 dB(A)
At 10 meters	20.9 – 34.2 dB(A)

🔇 For Reference: 40dB is quieter than a refrigerator hum, 50dB is similar to light rainfall or quiet conversation.

Electrical Protection Requirements

Component	Specification
Breaker (Rated Current)	21.0A
Residual Current Device (RCD)	30mA
Fuse Rating	21.0A
Power Cord	3 × 4mm² (for runs ≤10m)
Signal Cable	3 × 0.5mm² (extendable to 50m)

⚠️ Professional Installation Required: This commercial-grade unit must be installed by qualified technicians in accordance with local electrical codes.

🌡️ Pool Sizing & Heat-Up Performance

Recommended Pool Volumes

The Inverter+ 20.5kW is optimally sized for pools between 50-95 cubic meters (11,000-21,000 gallons). Proper sizing ensures the system operates predominantly at efficient lower speeds during maintenance heating, maximizing energy savings and minimizing noise.

Pool Volume	Pool Dimensions (Example)	Suitability
50 m³	10m × 5m × 1m average depth	✅ Excellent
65 m³	10m × 5m × 1.3m average depth	✅ Excellent
80 m³	12m × 5m × 1.35m average depth	✅ Excellent
95 m³	10m × 6m × 1.6m average depth	✅ Good
110 m³	12m × 6m × 1.5m average depth	⚠️ Consider IPHR70 model

Estimated Heat-Up Times

Important: The following estimates are calculated using standard heat pump formulas and assume ideal conditions: covered pool with isothermal blanket, filtration running 15+ hours daily, minimal wind exposure, and typical UK climate. Actual times may vary based on ambient temperature, humidity, wind, pool insulation, and initial water temperature.

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

Heat-Up Time Table: Typical UK Conditions (15°C Air Temperature)

Based on 14.0kW heating capacity at 15°C ambient

Pool Volume	5°C Rise (21°C→26°C)	10°C Rise (16°C→26°C)	15°C Rise (11°C→26°C)
50 m³	~21 hours	~41 hours	~62 hours
60 m³	~25 hours	~50 hours	~74 hours
70 m³	~29 hours	~58 hours	~87 hours
80 m³	~33 hours	~66 hours	~99 hours
90 m³	~37 hours	~74 hours	~111 hours

Heat-Up Time Table: Optimal Conditions (28°C Air Temperature)

Based on 21.7kW heating capacity at 28°C ambient

Pool Volume	5°C Rise (21°C→26°C)	10°C Rise (16°C→26°C)	15°C Rise (11°C→26°C)
50 m³	~13 hours	~27 hours	~40 hours
60 m³	~16 hours	~32 hours	~48 hours
70 m³	~19 hours	~37 hours	~56 hours
80 m³	~21 hours	~43 hours	~64 hours
90 m³	~24 hours	~48 hours	~72 hours

💡 Pro Tip: Once your pool reaches the desired temperature, the heat pump’s inverter technology maintains it efficiently by operating at 40-60% capacity, consuming significantly less energy than the initial heat-up phase.

💰 Running Costs & Energy Savings

Cost Comparison vs. Traditional Heating Methods

Scenario: Maintaining a 70m³ pool at 26°C during the May-September season (UK climate)

Heating Method	Estimated Seasonal Cost*	Relative Cost
Electric Resistance Heater	£3,200 – £4,000	🔴 Very Expensive
Gas Boiler (LPG)	£1,800 – £2,400	🟠 Expensive
Traditional Fixed-Speed Heat Pump	£900 – £1,200	🟡 Moderate
Inverter+ 20.5kW Heat Pump	£450 – £650	🟢 Economical

*Estimates based on typical UK energy prices: £0.24/kWh electricity, £0.07/kWh gas (2024/25)

Your Potential Savings: Up to £550-750 per season compared to traditional fixed-speed heat pumps, and over £2,500-3,500 compared to electric resistance heating.

Why Inverter Technology Saves Money

Traditional heat pumps operate at 100% capacity until reaching temperature, then cycle on/off repeatedly. Each startup wastes energy, wears components, and creates noise. The Inverter+ system:

✅ Eliminates wasteful on/off cycling
✅ Runs continuously at optimal efficiency (often 40-60% capacity)
✅ Reduces compressor wear and extends lifespan
✅ Delivers up to 50% lower running costs
✅ Maintains more stable water temperature

🔧 Installation Requirements

Location & Clearance

Minimum clearances around the unit for optimal performance:

• Front (Air Outlet): 3 meters minimum clear space
• Rear (Air Inlet): 30cm minimum from walls or obstructions
• Sides: 50cm minimum each side
• Above: Ensure rain/snow doesn’t accumulate on top

Ideal Installation Location:

• Well-ventilated outdoor area with good air circulation
• Protected from prevailing winds when possible
• Not enclosed in a shed or covered area (airflow restriction)
• Solid, level concrete base or anti-vibration mounting pads
• Within 10 meters of the pool (shorter pipe runs = better efficiency)
• Easy access to electrical supply and water connections

Water Flow Requirements

Recommended Flow Rate: 8-10 m³/hour (8,000-10,000 liters/hour)

Your circulation pump must provide adequate flow through the heat pump:

• Minimum flow: 8 m³/hour
• Maximum flow: 10 m³/hour
• Pump head: Minimum 10 meters

⚠️ Critical: Insufficient water flow triggers safety shutdowns and reduces heating efficiency. Too much flow can cause excessive pressure drop.

Electrical Installation

Power Requirements:

• Supply: 230V, Single Phase, 50Hz
• Maximum Draw: 3.18kW (13.8A at 230V)
• Breaker: 21A
• RCD Protection: 30mA required
• Must be hardwired (no plug connection)
• Earth bonding essential

🔌 Professional Installation Mandatory: This unit must be installed by a qualified electrician in compliance with BS 7671 wiring regulations and local building codes.

Hydraulic Connection

Water Pipe Connections: 50mm (2 inch) unions

Installation Best Practices:

• Use rigid pipework—flexible hoses cannot support the heat exchanger weight
• Install bypass valve for servicing
• Include isolation valves on inlet and outlet
• Position heat pump after filtration equipment
• Ensure water flow sensor or pressure switch is functioning
• Install condensate drainage tube (included) to drain off condensation

Recommended Equipment Integration:

1. Pool → Filter → Chemical Dosing → Heat Pump → Pool
2. Circulation pump runs before heat pump starts
3. Heat pump shuts down before circulation pump stops

⚙️ Smart Control Features

WiFi App Functionality

Remote Temperature Control

• Set and adjust target temperature from 18°C to 40°C
• Monitor current inlet and outlet water temperatures in real-time
• Switch between Celsius and Fahrenheit display

Operational Modes

• Smart Mode: Full 20-100% capacity range for fastest heating
• Silence Mode: Quieter operation at 20-80% capacity (3dB lower noise)
• One-touch mode switching from your phone

Intelligent Scheduling

• Create custom heating schedules for different days
• Program energy-saving temperature setbacks overnight
• Pre-heat before swimming sessions
• Coordinate with off-peak electricity tariffs to minimize costs

Monitoring & Diagnostics

• View current heating capacity percentage
• Track energy consumption patterns
• Receive maintenance reminders
• Instant error code notifications with troubleshooting guidance
• Check system status and operational parameters

Family Sharing

• Share control with family members through the app
• Multiple users can monitor and adjust settings
• Convenient control for everyone in the household

Control Panel Features

Intuitive LED Display

• Large backlit display with clear temperature readouts
• Shows inlet temperature, outlet temperature, and set point
• Displays current heating capacity percentage (0-100%)
• Visual WiFi connection indicator
• Operating mode icons (Smart/Silence)

Screen Lock Function

• Auto-locks after 30 seconds of inactivity
• Press and hold unlock button for 3 seconds to access controls
• Prevents accidental adjustments
• Screen goes dark when unit is powered off

Manual Controls

• On/Off power button
• Temperature up/down adjustment buttons
• Mode selection button
• Defrost function (automatic and manual override)

Power-Off Memory

• Automatically restarts with previous settings after power interruption
• Maintains programmed temperature and mode preferences
• No need to reconfigure after power cuts

🛠️ Maintenance & Winterization

Routine Maintenance

Every 3 Months During Swimming Season:

✅ Visually inspect the evaporator coil for debris, leaves, or blockages
✅ Clean the aluminum fins gently with water or mild household detergent
✅ Never use gasoline, solvents, or pressure washers
✅ Check all electrical connections for corrosion or looseness
✅ Verify water flow is adequate and consistent
✅ Listen for unusual noises that might indicate issues

Annual Professional Service (Recommended):

• Complete system inspection by qualified technician
• Refrigerant charge verification
• Electrical connection tightening
• Heat exchanger inspection
• Safety system testing
• Titanium tube descaling (if required in hard water areas)

Winterization Procedure

When closing your pool for winter:

Step 1: Power Down Safely

• Switch off the heat pump at the controller
• Turn off circuit breaker to the unit
• Disconnect power supply

Step 2: Drain Water from Heat Exchanger

• Remove both inlet and outlet 50mm water unions
• Allow all water to drain completely from the heat exchanger
• Tilt unit slightly if needed to ensure complete drainage

Step 3: Protect from Elements

• Do not cover the unit completely (condensation risk)
• Ensure no water can pool on top of the unit
• Keep air vents unobstructed

⚠️ Critical Warning: Water freezing inside the titanium heat exchanger will cause catastrophic damage not covered by warranty. Complete drainage is essential if operating temperatures below 2°C are expected.

Alternative for Year-Round Use: If maintaining pool temperature above 2°C throughout winter:

• Ensure circulation pump runs continuously
• Set heat pump to anti-freeze protection mode
• Monitor water flow daily
• Never allow water to stagnate in the heat exchanger

❓ Frequently Asked Questions

Q: What size pool is this heat pump suitable for?

A: The Inverter+ 20.5kW is optimally sized for pools between 50-95 cubic meters (11,000-21,000 gallons). This typically covers large residential pools like a 10m × 5m pool up to 1.6m average depth. For commercial applications or pools exceeding 95m³, consider the 29.2kW IPHR70 model. Proper sizing ensures the unit operates efficiently at lower speeds during maintenance heating, maximizing energy savings and minimizing noise.

Q: How long does it take to heat my pool?

A: Heat-up time depends on pool volume, desired temperature rise, and ambient conditions. For example, heating a 70m³ pool by 10°C in typical UK spring conditions (15°C air) takes approximately 58 hours. In warmer summer conditions (28°C air), the same heating task takes about 37 hours. Once at temperature, the inverter system maintains it efficiently by running at 40-60% capacity, typically cycling for 4-8 hours daily depending on weather and pool cover usage.

Q: Will this heat pump work during British winters?

A: Yes, the Inverter+ operates efficiently down to -10°C ambient temperature, though heating capacity and efficiency decrease as temperatures drop. At 15°C (typical UK spring/autumn), it produces 14.0kW heating capacity. At 5°C, expect approximately 8-10kW output. The unit includes automatic defrost functionality to maintain performance in cold, humid conditions. However, for economical winter pool heating, always use a quality pool cover to minimize heat loss.

Q: How much does it cost to run?

A: Running costs depend on pool size, temperature setting, ambient conditions, and electricity rates. For a 70m³ pool maintained at 26°C during May-September, expect approximately £450-650 for the season at current UK electricity prices (£0.24/kWh). This represents savings of up to 50% compared to traditional fixed-speed heat pumps. Using the WiFi app to create efficient heating schedules and coordinating with off-peak tariffs can reduce costs further.

Q: Is it really 10 times quieter than normal heat pumps?

A: Yes, the advanced twin-rotary DC inverter compressor technology virtually eliminates vibrations compared to traditional reciprocating compressors. At 1 meter distance, noise levels range from 40.9-54.2 dB(A) depending on heating load. At 10 meters, this drops to 20.9-34.2 dB(A)—quieter than normal conversation. During maintenance heating when operating at 40-60% capacity, noise is barely perceptible, making it ideal for residential areas with close neighbors.

Q: Can I control it from my phone?

A: Absolutely! The integrated WiFi module and dedicated smartphone app (iOS and Android) provide complete remote control. Monitor and adjust temperature, switch between Smart and Silence modes, create heating schedules, track energy consumption, and receive maintenance alerts—all from anywhere with internet access. Multiple family members can share control through the app. WiFi setup takes about 5 minutes using the step-by-step guide in the manual.

Q: What’s the difference between Smart Mode and Silence Mode?

A: Smart Mode operates across the full 20-100% capacity range, providing fastest heating and intelligent optimization for variable conditions. Silence Mode limits operation to 20-80% capacity and reduces fan speeds, resulting in 3dB(A) lower noise levels—perfect for nighttime heating when you want minimal disturbance. Both modes utilize full inverter technology for energy efficiency, with Smart Mode recommended for initial heat-up and Silence Mode ideal for overnight maintenance heating.

Q: Do I need a professional to install this?

A: Yes, professional installation is mandatory. This is a commercial-grade unit requiring:

• Qualified electrician for hardwired 230V connection with proper breaker and RCD protection
• Competent plumber for hydraulic integration with existing pool equipment
• Knowledge of heat pump positioning and clearance requirements
• Understanding of water flow requirements and bypass valve installation
• Gas handling certification if any refrigerant work is needed

Improper installation voids warranty and creates safety hazards. Budget £400-800 for professional installation depending on site complexity.

Q: What maintenance does it require?

A: Routine maintenance is minimal but essential:

• Every 3 months: Clean evaporator coil fins with water, check for debris
• Annually: Professional service to inspect connections, verify refrigerant, test safety systems
• Winterization: Drain heat exchanger completely if not maintaining pool above 2°C
• Ongoing: Ensure water flow remains adequate, monitor for error codes via app

The titanium heat exchanger is highly corrosion-resistant, requiring minimal intervention compared to copper heat exchangers. Most maintenance takes 15-30 minutes per session.

Q: How does it compare to gas heating?

A: Heat pumps are significantly more efficient and economical than gas boilers for pool heating:

Heat Pump Advantages:

• 4-8 times more energy efficient (COP of 4-8 vs. gas efficiency of 0.8-0.9)
• Up to 70% lower running costs compared to LPG
• No gas supply or storage required
• Lower carbon emissions
• Safer operation (no combustion)

Gas Heating Advantages:

• Faster initial heat-up in very cold conditions
• Not affected by ambient temperature (though efficiency drops in cold)

For most UK applications, the heat pump provides far better economics over the swimming season, with payback typically within 2-3 years.

Q: Is the R32 refrigerant environmentally friendly?

A: Yes, R32 is significantly more environmentally friendly than older refrigerants:

• Global Warming Potential (GWP) of 675 vs. 2,088 for R410A
• Zero Ozone Depletion Potential (ODP)
• Better energy efficiency than most alternatives
• Improved thermodynamic properties

The 500g charge in this unit equals 0.810 tonnes CO₂ equivalent—far lower than comparable systems using older refrigerants. R32 is the current industry standard for environmentally responsible heat pump operation.

Q: What warranty is included?

A: Please contact us directly for current warranty information, as coverage varies by installation date and conditions. Warranty typically covers manufacturing defects in materials and workmanship. To maintain warranty validity:

• Professional installation is required with documentation
• Annual professional servicing recommended
• Winterization procedures must be followed
• Unit must be operated within specified parameters
• No unauthorized modifications or repairs

Damage from freezing, improper installation, inadequate maintenance, or operation outside specifications voids warranty coverage.

Q: Can I use it with a salt water pool?

A: Yes, the titanium heat exchanger is specifically designed for excellent corrosion resistance in salt water applications, including salt chlorinator systems. Titanium is far superior to copper or cupro-nickel heat exchangers for salt water pools. However, ensure:

• Salt levels remain within manufacturer’s recommendations (typically 3,000-5,000 ppm)
• pH levels are properly balanced (7.2-7.8)
• Annual inspection of heat exchanger for any scale buildup
• Adequate water flow to prevent localized corrosion

The robust construction makes this heat pump ideal for both traditional chlorine and salt water pool systems.

🎯 What’s In The Box

✅ Inverter+ 20.5kW Heat Pump Unit (Model IPHR55)
✅ Installation & User Manual (full documentation)
✅ Condensate Drainage Tube
✅ WiFi Module (pre-installed)
✅ 50mm Water Union Connections (inlet/outlet)
✅ Mounting Hardware for Concrete Base Installation

Not Included (Customer Supplies):

• Electrical wiring, conduit, breaker, and RCD
• Water circulation pump (8-10 m³/hr capacity, 10m head minimum)
• Rigid water pipework (50mm PVC or ABS)
• Isolation valves and bypass valve
• Concrete mounting base or anti-vibration pads
• Professional installation services

✅ Why Buy From Us?

Expert Product Knowledge We specialize in hot tub and pool equipment, providing detailed technical guidance to ensure you select the perfect heating solution for your specific application. Our team understands the complexities of pool heating systems and can answer your most technical questions.

Professional Installation Support We can provide recommendations for qualified installers in your area and offer detailed installation guidance to ensure your heat pump performs optimally from day one. Proper installation is critical for efficiency and longevity.

Ongoing Technical Assistance Our support doesn’t end at purchase. We’re here to help with operational questions, troubleshooting, maintenance advice, and optimization tips throughout your heat pump’s lifespan.

Genuine UK Stock Fast dispatch from our UK warehouse with reliable courier delivery. No waiting for overseas shipments or dealing with customs complications.

Competitive Pricing We offer competitive pricing on premium pool heating equipment without compromising on quality or support. Investing in the right heat pump saves money over its lifetime.

📞 Need Help Choosing?

Not Sure If This Is The Right Model?

Our team is happy to discuss your specific requirements:

• Pool dimensions and volume calculations
• Current heating system (if replacing)
• Desired swimming season and temperature preferences
• Budget and running cost considerations
• Site-specific installation challenges
• Integration with existing pool equipment

Contact us for personalized advice on selecting and installing the ideal heat pump for your pool. For commercial applications or pools over 95m³, we can recommend the appropriate larger capacity models from the Inverter+ range.