Inverter+ 17.5kW 1-Phase Pool Heat Pump – Ultra-Quiet Heating | IPHR45 🏊‍♂️

Transform your swimming experience with premium Full-Inverter technology that delivers powerful 17.5kW heating while slashing energy costs by up to 50%. Perfect for larger pools (40-75m³), this whisper-quiet heat pump combines professional-grade performance with smart WiFi control for effortless pool management.

Cut Your Energy Bills in Half Full-Inverter technology adapts power output in real-time, delivering 100% capacity for rapid initial heating then intelligently modulating to approximately 50% for efficient maintenance. This smart operation reduces running costs by up to 50% compared to traditional on/off heat pumps.

Whisper-Quiet Operation 🔇 Approximately 10 times quieter than conventional heat pumps thanks to twin-rotary DC compressors that virtually eliminate operational vibrations. During maintenance heating at reduced speeds, noise becomes virtually imperceptible – enjoy your outdoor space without disruption.

Control from Anywhere 📱 Built-in WiFi module with intuitive smartphone app lets you monitor and adjust your pool temperature remotely, create custom heating schedules, track energy consumption, and receive maintenance alerts – all from the palm of your hand.

Built to Last 💪 Industrial-grade construction features a high-performance titanium heat exchanger for superior corrosion resistance against pool chemicals and salt water, housed in a robust weatherproof aluminum-alloy casing designed for demanding applications.

Eco-Friendly Choice 🌱 Uses environmentally friendly R32 refrigerant with significantly lower global warming potential. Extended swimming seasons become economically viable with minimal environmental impact.

Perfect Pool Sizing Guide 🌊

Recommended Pool Volume: 40-75m³

The 17.5kW capacity is ideally suited for:

• Large residential swimming pools (40,000 – 75,000 litres)
• Swim spas requiring consistent heating
• Small commercial pool installations
• Pools where extended season use is desired

Why Proper Sizing Matters: Choosing the right capacity allows the heat pump to operate predominantly at lower, more efficient speeds under typical conditions. This approach maximizes energy savings, minimizes noise, and maintains consistent water temperatures with optimal efficiency.

Estimated Heat-Up Times ⏱

Understanding how quickly your pool will heat helps you plan effectively. Below are estimated times for the Inverter+ 17.5kW heat pump to raise pool temperature under ideal conditions.

Heat-Up Time Calculator: These estimates use the formula: Time (hours) = (Pool Volume m³ × Temperature Rise °C × 1.16) ÷ Heat Output kW

Heat-Up Times at 15°C Air Temperature (10.5kW average output)

Pool Volume	Temperature Rise	Estimated Heat-Up Time
40m³ (40,000L)	5°C	22 hours
40m³ (40,000L)	10°C	44 hours
50m³ (50,000L)	5°C	28 hours
50m³ (50,000L)	10°C	55 hours
60m³ (60,000L)	5°C	33 hours
60m³ (60,000L)	10°C	66 hours
75m³ (75,000L)	5°C	41 hours
75m³ (75,000L)	10°C	83 hours

Heat-Up Times at 28°C Air Temperature (18.6kW peak output)

Pool Volume	Temperature Rise	Estimated Heat-Up Time
40m³ (40,000L)	5°C	12 hours
40m³ (40,000L)	10°C	25 hours
50m³ (50,000L)	5°C	15 hours
50m³ (50,000L)	10°C	31 hours
60m³ (60,000L)	5°C	19 hours
60m³ (60,000L)	10°C	37 hours
75m³ (75,000L)	5°C	23 hours
75m³ (75,000L)	10°C	47 hours

⚠ Important Disclaimer: These are theoretical estimates under ideal conditions (pool covered with isothermal cover, filtration running 15+ hours daily, no heat loss, optimal weather). Actual heat-up times vary significantly based on:

• Ambient air temperature and humidity
• Wind exposure and weather conditions
• Pool surface area and heat loss rate
• Whether pool is covered when not in use
• Initial water temperature
• Filtration system run times
• Pool insulation and construction

💡 Pro Tip for Faster Heating: Initial heat-up from cold takes longer. Once at temperature, the Inverter+ technology maintains warmth efficiently. Use Smart mode for fastest initial heating, then switch to Silence mode for ultra-quiet overnight maintenance.

Technical Specifications 📊

Performance Data – Model IPHR45

Air Temperature 28°C | Water 26°C | Humidity 80%

Specification	Value
Heating Capacity	18.6 kW
COP (Coefficient of Performance)	16.7 – 6.6
COP at 50% Capacity	11.8
Energy Efficiency	Up to 50% cost reduction vs standard units

Air Temperature 15°C | Water 26°C | Humidity 70%

Specification	Value
Heating Capacity	11.5 kW
COP (Coefficient of Performance)	7.8 – 4.5
COP at 50% Capacity	6.4
Rated Input Power	0.30 – 2.6 kW
Rated Input Current	1.3 – 11.3 A

Core Specifications

Feature	Details
Model Number	IPHR45
Power Supply	230V / 1 Phase / 50Hz
Advised Pool Volume	40-75 m³ (40,000-75,000 litres)
Operating Air Temperature Range	-10°C to 43°C
Temperature Setting Range	18°C to 40°C
Advised Water Flow Rate	6.5 – 8.5 m³/h
Compressor Type	Twin-rotary Mitsubishi DC Inverter
Heat Exchanger	Spiral titanium tube in PVC housing
Refrigerant	R32 (environmentally friendly)
Refrigerant Charge	1000g
CO₂ Equivalent	0.675 tonnes
WiFi Connectivity	Built-in with smartphone app

Noise Performance

Measurement Distance	Sound Level Range
At 1 metre	43.1 – 53.8 dB(A)
At 10 metres	23.1 – 33.8 dB(A)

Significantly quieter than conventional heat pumps, especially during Silence mode operation at night.

Physical Dimensions & Installation

Specification	Measurement
Dimensions (L × W × H)	954 × 429 × 648 mm
Net Weight	63 kg
Water Pipe Connections	50mm (inlet/outlet)
Casing Material	Aluminum-alloy (weatherproof)
Installation Type	Outdoor, well-ventilated area required

Electrical Protection Requirements

Component	Specification
Breaker Rated Current	18.0 A
Residual Current Device	30 mA
Fuse Rating	18.0 A
Power Cord	3 × 4 mm² (for cables ≤10m)
Signal Cable	3 × 0.5 mm² (extendable to 50m)

Key Features & Benefits 🌟

Intelligent Dual Operating Modes

Smart Mode (Default) 🚀

• Heating Capacity: 20% to 100% variable output
• Best For: Initial pool heating, rapid temperature increase
• Advantage: Fastest heat-up times with intelligent optimization
• When to Use: Season start-up, after cold weather, significant temperature increases

Silence Mode 🌙

• Heating Capacity: 20% to 80% variable output
• Sound Level: 3dB(A) lower than Smart mode
• Best For: Overnight operation, noise-sensitive environments
• When to Use: Maintenance heating, nighttime operation, close to living areas

Power-Off Memory Function Automatically restarts with previous settings when power is restored – no need to reprogram after power outages.

📄 Product Documentation & Downloads

Complete Installation & User Manual (opens in new tab) Download USER-INSTALLATION-MANUAL-FAIRLAND-Inverter-Plus.pdf 📥

This comprehensive 29-page manual includes:

• Step-by-step installation instructions with wiring diagrams
• Complete technical specifications for all Inverter+ models
• WiFi setup and smartphone app configuration guide
• Daily maintenance procedures and winterization instructions
• Troubleshooting guide with failure codes
• Heating priority wiring options
• Safety warnings and operating conditions

Advanced Full-Inverter Technology

Unlike traditional on/off heat pumps, Full-Inverter technology continuously adjusts compressor speed to match heating requirements:

✅ Delivers 100% power initially for rapid pool heating at season start

✅ Intelligently modulates to ~50% power for efficient maintenance heating

✅ Eliminates on/off cycling that wastes energy and causes temperature fluctuations

✅ Soft start functionality prevents electrical load spikes

✅ Virtually eliminates vibrations for ultra-quiet operation

✅ Continuously adapts based on real-time conditions

Smart WiFi Control Features 📱

Transform your pool heating management with the integrated WiFi module and intuitive smartphone app:

Remote Monitoring & Control

• Adjust temperature settings from anywhere
• View real-time inlet and outlet water temperatures
• Monitor heating capacity percentage
• Check system status and operating mode

Intelligent Scheduling

• Create customized heating schedules aligned with your usage patterns
• Pre-heat pool before swimming sessions
• Reduce heating during unused periods
• Maximize efficiency with timed operation

Energy Tracking

• Track detailed energy consumption metrics
• Monitor COP (efficiency) in real-time
• Identify opportunities for further savings
• View historical performance data

Proactive Maintenance

• Receive system status notifications
• Get alerts for maintenance requirements
• Access fault codes and diagnostics remotely
• Reduce service call costs with early detection

Family Sharing Share device control with family members through the app – multiple users can monitor and adjust settings.

Premium Construction Quality

Titanium Heat Exchanger

• Superior corrosion resistance against chlorine and salt water
• Spiral tube design maximizes heat transfer efficiency
• Protected by robust PVC housing
• Extended service life even in harsh chemical environments

Aluminum-Alloy Casing

• Weatherproof construction for outdoor installation
• Corrosion-resistant finish
• Protects internal components from environmental exposure
• Maintains appearance and performance over years

Twin-Rotary DC Compressor

• Mitsubishi technology for reliability
• Variable-speed operation for optimal efficiency
• Dramatically reduced vibration and noise
• Extended lifespan through reduced wear

Safety & Protection Features 🛡

The Inverter+ IPHR45 incorporates comprehensive protection systems:

• Low Water Flow Protection: Prevents operation without adequate water circulation
• Anti-Freeze Protection: Monitors temperatures to prevent freeze damage
• High/Low Pressure Protection: Safeguards refrigeration system
• Overheat Protection: Multiple temperature sensors prevent overheating
• Phase Sequence Protection: Ensures correct electrical connection
• Current Protection: Prevents electrical overload damage
• Auto-Defrost Function: Maintains efficiency in cold conditions
• Compulsory Defrost Available: Manual override when needed

Installation Clearance Requirements 📐

Minimum Clearance Distances:

Location	Minimum Distance
Front (Air Intake)	500mm clear space
Rear (Air Discharge)	1000mm clear space
Left Side	300mm clear space
Right Side	300mm clear space
Above Unit	1500mm clear space

Installation Location Requirements:

✅ Must be installed outdoors in well-ventilated area

✅ Level concrete foundation or strong anti-rust brackets (M10 bolts)

✅ No obstructions blocking air intake or discharge

✅ Away from combustible materials and ignition sources

✅ Protected from direct rainfall where possible (unit is weatherproof but protection extends life)

✅ Accessible for maintenance and service

✅ Keep condensate drainage in mind (drain tube included)

✅ Within 10m of pool for optimal efficiency

❌ Never install:

• In enclosed spaces or indoors
• Where air recirculation can occur
• In areas with poor ventilation
• Near bedroom windows (noise consideration)
• Where falling objects could damage unit

Running Cost Comparison 💰

Why Inverter Technology Saves Money:

Based on heating a 50m³ pool from 15°C to 28°C (13°C rise) over a typical UK swimming season:

Traditional On/Off Heat Pump

• Average COP: 4.0
• Energy Required: ~2,450 kWh per season
• Cost at £0.28/kWh: ~£686 per season

Inverter+ IPHR45 Full-Inverter Heat Pump

• Average COP: 6.4 (at 50% capacity)
• Energy Required: ~1,530 kWh per season
• Cost at £0.28/kWh: ~£428 per season

Annual Savings: ~£258 💷

Additional Savings Through:

• Smart scheduling reduces wasted heating
• Efficient maintenance heating at variable speeds
• WiFi monitoring prevents over-heating
• Superior insulation retention

Payback Period: Typically 3-5 years depending on usage patterns and pool size.

⚠ Disclaimer: Running cost estimates are based on average UK electricity prices and typical usage patterns. Actual costs vary based on electricity tariff, local climate, pool usage, water temperature preferences, pool covering practices, and heating schedule.

Seasonal Performance Expectations 🌤

Spring (March – May)

Air Temperatures: 8-15°C

• Heating capacity: 8-11.5 kW
• COP: 5.5-7.0
• Longer initial heat-up time from winter temperatures
• Smart mode recommended for season start-up
• Expect 3-5 days for initial warming from cold

Summer (June – August)

Air Temperatures: 18-28°C

• Heating capacity: 13-18.6 kW
• COP: 10-15
• Peak efficiency and performance
• Maintenance heating only in warm weather
• May not need to run daily in hot weather

Autumn (September – November)

Air Temperatures: 10-18°C

• Heating capacity: 9-13 kW
• COP: 6.0-9.0
• Extended swimming season possible
• Silence mode suitable for comfortable temperatures
• Cover pool when not in use to retain heat

Winter Operation (Below 10°C)

Air Temperatures: -10 to 10°C

• Heating capacity: 5-9 kW (estimated)
• COP: 4.0-6.0
• Auto-defrost cycles activate as needed
• Must maintain water flow above 2°C
• Consider pool cover essential
• Higher running costs but still efficient vs. alternatives

Year-Round Swimming: The Inverter+ IPHR45’s wide operating range (-10°C to 43°C) and high efficiency make year-round pool heating economically viable. With proper pool covering and smart scheduling, enjoy your pool 12 months a year.

Frequently Asked Questions ❓

Q: What size pool is this heat pump suitable for? A: The Inverter+ 17.5kW (IPHR45) is designed for pools between 40-75m³ (40,000-75,000 litres). This sizing allows the heat pump to operate efficiently at variable speeds. For smaller pools, consider the IPHR33 or IPHR40 models. For larger pools, look at the IPHR55 or IPHR70 models.

Q: How long will it take to heat my pool initially? A: Initial heat-up time depends on several factors including pool volume, starting temperature, ambient air temperature, and whether the pool is covered. As an example, a 50m³ pool requiring a 10°C temperature rise would take approximately 31 hours in warm weather (28°C air) or 55 hours in cooler weather (15°C air). Once at temperature, the Inverter technology maintains warmth very efficiently. See the heat-up time tables above for more scenarios.

Q: What makes Full-Inverter technology better than standard heat pumps? A: Traditional on/off heat pumps run at full power until reaching set temperature, then switch off completely, cycling on and off repeatedly. This wastes energy and causes temperature fluctuations. Full-Inverter technology continuously adjusts compressor speed (20-100%) to match your pool’s exact heating needs. This delivers up to 50% energy savings, dramatically quieter operation (10x quieter), longer equipment life, and more stable water temperatures.

Q: How quiet is the Inverter+ IPHR45? A: At 1 metre distance, the sound level ranges from 43-54 dB(A) depending on heating load, with Smart mode at the higher end and Silence mode 3dB quieter. At 10 metres distance, this drops to 23-34 dB(A). For comparison, a whisper is about 30dB, quiet conversation is 50dB, and a standard heat pump is typically 60-70dB. During maintenance heating in Silence mode, the unit becomes virtually imperceptible.

Q: Can I control the heat pump when I’m not at home? A: Yes! The built-in WiFi module and smartphone app allow full remote control from anywhere with internet connection. You can adjust temperature, switch between Smart and Silence modes, create heating schedules, monitor energy usage, view inlet/outlet temperatures, and receive maintenance alerts – all from your phone. The app works on both iOS and Android devices.

Q: What’s the difference between Smart mode and Silence mode? A: Smart mode provides 20-100% variable heating capacity and is recommended for initial pool heating or when you need maximum performance. Silence mode limits capacity to 20-80% and operates 3dB(A) quieter – ideal for overnight operation or noise-sensitive areas. Smart mode heats faster; Silence mode runs quieter. Both deliver excellent efficiency, and you can switch between them anytime through the control panel or app.

Q: Do I need a professional to install this heat pump? A: Yes, professional installation is required and strongly recommended. The heat pump requires proper electrical connection (230V single-phase with appropriate breaker and earth), plumbing integration with your pool filtration system, appropriate clearances for ventilation, secure mounting on a level foundation, and commissioning tests. Improper installation can damage the unit, void warranty, and create safety hazards. The installation manual is provided for qualified installers.

Q: What maintenance does the Inverter+ heat pump require? A: The heat pump is relatively low-maintenance. Regular tasks include: cleaning the evaporator (air intake coils) annually with household cleaner or water (never use solvents), checking bolts and electrical connections annually, ensuring nothing blocks air flow, and winterization if not used in freezing conditions. Professional servicing by a qualified technician is recommended annually. The titanium heat exchanger is highly resistant to corrosion and requires minimal maintenance.

Q: Can the heat pump operate in winter or freezing conditions? A: Yes, the Inverter+ IPHR45 operates in air temperatures from -10°C to 43°C. However, when water temperatures approach 2°C, you must maintain continuous water flow to prevent freeze damage. The unit includes anti-freeze protection and auto-defrost functions. If not using the pool in winter, it’s recommended to winterize by draining water from the heat pump (unscrew inlet water union) and cutting power. Never allow water to freeze inside the unit as this can damage the titanium heat exchanger.

Q: How energy-efficient is this heat pump compared to gas or electric heating? A: Heat pumps are far more efficient than traditional heating methods. The Inverter+ IPHR45 achieves a COP (Coefficient of Performance) of 6.4-11.8 under typical conditions, meaning for every 1 kW of electricity consumed, it produces 6.4-11.8 kW of heat by extracting warmth from the air. Gas heaters typically achieve 0.8-0.95 efficiency, and electric resistance heaters achieve 1.0. This makes the Inverter+ approximately 7-12 times more efficient than electric heaters and 8-14 times more efficient than gas heaters. Running cost savings of 50% or more compared to conventional pool heating are typical.

Q: Is the R32 refrigerant environmentally friendly? A: Yes, R32 refrigerant is significantly more environmentally friendly than older refrigerants. It has a Global Warming Potential (GWP) of 675, which is approximately one-third that of R410A (GWP 2088) and much lower than R22. R32 also has zero Ozone Depletion Potential (ODP). The 1000g charge in the IPHR45 has a CO₂ equivalent of 0.675 tonnes, making it one of the more eco-conscious choices in pool heating.

Q: What warranty is included with this heat pump? A: Please contact Parts4Tubs directly for current warranty information and terms. Warranty coverage typically depends on proper professional installation, regular maintenance, and adherence to operating guidelines. Keeping detailed service records and following winterization procedures helps ensure warranty validity.

What’s Included in the Box 📦

When you receive your Inverter+ IPHR45 heat pump, you’ll find:

✅ Inverter+ IPHR45 Heat Pump Unit (pre-charged with R32 refrigerant) ✅ Drainage Tube for condensation water removal ✅ Installation Manual with detailed instructions ✅ WiFi Setup Guide for smartphone app configuration ✅ Warranty Documentation

You Will Need to Provide:

• Appropriate water pump (specifications in manual)
• 50mm hard piping and fittings (flexible hose not suitable)
• Electrical supply and wiring (230V 1-phase)
• Circuit protection (breaker/RCD) rated appropriately
• Concrete foundation or mounting brackets (M10 bolts)
• Professional installation services

Professional Installation Required ⚙

This heat pump must be installed by qualified professionals. DIY installation is not recommended and may:

• Void warranty coverage
• Create safety hazards
• Damage the equipment
• Violate electrical codes
• Result in poor performance

Installation includes:

• Electrical connection with proper earthing and circuit protection
• Hard pipe integration with pool filtration system
• Secure mounting on level foundation
• Water flow testing and balancing
• Refrigerant leak testing
• Control configuration and WiFi setup
• System commissioning and performance verification

The comprehensive installation manual is provided to your installer and includes detailed wiring diagrams, plumbing schematics, clearance requirements, and commissioning procedures.

Why Buy from Parts4Tubs? 🏆

Expert Knowledge As specialists in hot tub and pool equipment, we understand your heating needs and can provide expert guidance on selecting the right model for your specific application.

Genuine Products All our Inverter+ heat pumps are genuine Fairland products, properly imported and supported with full manufacturer backing.

Comprehensive Support We’re here to help with product selection, installation planning, operational questions, and ongoing support throughout your heat pump’s lifetime.

Competitive Pricing Premium quality Full-Inverter technology at competitive prices, with the long-term savings to justify your investment.

Fast Delivery Quick dispatch on stocked items gets your new heat pump to you promptly so you can start enjoying warmer water sooner.

Ready to Transform Your Pool Heating? 🌊

The Inverter+ 17.5kW heat pump represents the pinnacle of pool heating technology – combining powerful performance with exceptional efficiency, whisper-quiet operation, and smart connectivity. Whether you’re looking to extend your swimming season, reduce energy costs, or simply enjoy more comfortable water temperatures, this professional-grade system delivers outstanding value.

Investment in Comfort & Efficiency While the initial investment is higher than conventional heat pumps, the energy savings, extended equipment life, and superior performance typically provide payback within 3-5 years – followed by decades of efficient, reliable service.

Questions Before Ordering? Our team is ready to help you determine if the IPHR45 is the right model for your pool, answer technical questions, discuss installation requirements, or provide guidance on any aspect of pool heating. Please don’t hesitate to reach out for personalized assistance.

Ready to Order? Click “Add to Cart” above to begin enjoying warmer pool water, lower energy bills, and the peace of mind that comes with premium Full-Inverter technology.