🌊 Pentair InverTemp-FL Full Inverter Heat Pump – Ultra-Quiet Pool Heating & Cooling for 30-45m³ Pools

Smart, silent, and supremely efficient – the intelligent choice for year-round pool comfort.

Experience the pinnacle of pool heating technology with the Pentair InverTemp-FL Heat Pump. Engineered with advanced Full Inverter Technology, this premium heat pump delivers whisper-quiet operation, exceptional energy efficiency, and intelligent climate control for residential pools between 30 and 45 cubic metres. With COP ratings reaching an impressive 10.8 in Eco Mode, WiFi smartphone control, and eco-friendly R32 refrigerant, the InverTemp-FL represents the perfect fusion of performance, sustainability, and user convenience.

🎯 Why Choose the Pentair InverTemp-FL?

Industry-Leading Silence

Certified at less than 42 dB(A) in Boost Mode – quieter than a library – the InverTemp-FL lets you enjoy poolside tranquillity without the constant hum of traditional heat pumps. The unique airflow design and variable-speed fan technology ensure peaceful operation that won’t disturb you or your neighbours.

Exceptional Energy Efficiency

Save significantly on running costs with COP (Coefficient of Performance) ratings from 5.5 to an outstanding 10.8 depending on operating mode. This means for every 1 kW of electricity consumed, you receive up to 10.8 kW of heating output – making it one of the most cost-effective ways to heat your pool.

Smart WiFi Control

Control your pool temperature from anywhere using the Smart Life app (iOS & Android). The integrated WiFi TFT touch screen provides intuitive local control, while remote access lets you adjust settings, monitor performance, and schedule operation from your smartphone.

Eco-Friendly Design

Uses R32 refrigerant – a cleaner, more environmentally responsible alternative with significantly lower global warming potential than older refrigerants. The premium titanium heat exchanger provides exceptional corrosion resistance and longevity, ensuring decades of reliable service.

Year-Round Performance

Unlike conventional heat pumps, the InverTemp-FL operates efficiently in ambient temperatures from -15°C to +43°C. The independent active defrost system ensures reliable performance even during cold weather, extending your swimming season beyond what you thought possible.

✨ Key Features & Benefits

🔧 Full Inverter Technology

Advanced Variable-Speed Operation

• Inverter compressor and variable-speed fan work in harmony to automatically adjust performance based on ambient conditions and pool temperature requirements
• Continuously modulates power output from 30% to 100% capacity for optimal efficiency
• Eliminates the energy-wasting on/off cycling of fixed-speed heat pumps
• Delivers precise temperature control within ±0.5°C of your set point

Benefit: Lower electricity bills, faster heating when needed, and consistent water temperature without fluctuations.

🔇 Ultra-Quiet Operation

Certified Whisper-Silent Performance

• Noise level as low as <40 dB(A) at 10 metres (Boost Mode certified <42 dB(A))
• Unique airflow design minimizes sound transmission
• Variable-speed fan reduces noise during partial load operation
• Strategic component placement and sound-dampening materials

Benefit: Enjoy your outdoor space in peace. Quieter than normal conversation levels, the InverTemp-FL won’t disturb your relaxation or create neighbourhood complaints.

📱 Smart Connectivity Suite

Complete Remote Control Freedom

• Integrated WiFi with TFT colour touch screen for local control
• Smart Life app compatibility (iOS & Android) for remote operation from anywhere
• Compatible with Pentair automation systems: Speedeo®, Soleo® VS, and Intellipool® via Modbus RS485
• Real-time temperature monitoring and performance data
• Programmable timers for automated operation
• Push notifications for status changes and alerts

Benefit: Arrive home to a perfectly warmed pool. Monitor and adjust temperature on your commute, from holiday, or from anywhere with internet access.

💚 Environmentally Responsible

Sustainable Heating Solution

• R32 refrigerant with 68% lower global warming potential than R410A
• Zero ozone depletion potential
• Energy efficiency reduces carbon footprint by up to 75% compared to gas or electric resistance heating
• Durable construction minimizes lifetime environmental impact
• Fully recyclable at end of life

Benefit: Heat your pool with a clear conscience, knowing you’re making an environmentally responsible choice that reduces both costs and carbon emissions.

🛡️ Premium Build Quality

Engineered for Longevity

• High-quality titanium heat exchanger provides superior corrosion resistance in all water chemistry conditions (chlorine, salt, bromine)
• Independent active defrost system ensures reliable cold-weather operation
• Robust powder-coated steel cabinet with reinforced ABS components and UV protection
• Mitsubishi/Toshiba 2D Full DC Inverter compressor – industry-leading reliability
• Electronic expansion valve for precise refrigerant control

Benefit: Years of trouble-free operation with minimal maintenance. The 10-year warranty on the titanium heat exchanger demonstrates Pentair’s confidence in long-term durability.

🎛️ Three Intelligent Operating Modes

Optimized for Every Situation

ECO SILENT Mode: Maximum efficiency and whisper-quiet operation

• Power range: 30-60% capacity (3.5-5.8 kW heating)
• COP: 8.3-10.8 (exceptional efficiency)
• Ideal for: Maintaining temperature once reached, overnight operation, noise-sensitive environments
• Fan operates at minimum speed, compressor optimized for maximum COP

SMART Mode: Intelligent automatic optimization

• Power range: 30-100% capacity (3.5-8.8 kW heating)
• COP: 5.5-10.8 (automatically optimized)
• Ideal for: Day-to-day operation, automatic response to changing conditions
• Automatically balances power, efficiency, and noise based on ambient temperature and pool temperature differential

BOOST Mode: Maximum heating power

• Power range: 85-100% capacity (up to 8.8 kW heating)
• COP: 5.5-6.5 (still highly efficient)
• Ideal for: Initial heat-up, rapid temperature recovery, cold weather operation
• Delivers maximum heating capacity to warm your pool as quickly as possible

Benefit: Choose the mode that matches your priorities – save energy and enjoy silence with Eco, let the unit optimize automatically with Smart, or heat rapidly with Boost.

📄 Downloads & Documentation

📥 Complete Installation & Operating Manual (opens in new tab) Download Pentair InverTemp-FL Manual

This comprehensive 17-page manual includes detailed technical specifications, step-by-step installation instructions, electrical connection diagrams for both single-phase and three-phase systems, hydraulic connection guidance, WiFi setup procedures, operating instructions for all three modes (Eco, Smart, Boost), maintenance schedules, winterization procedures, troubleshooting guide with error codes, and circuit diagrams. Essential reading for installers and owners alike.

📊 Complete Technical Specifications

Pool & Performance Specifications

Specification	Detail
Recommended Pool Volume	30-45 m³ (30,000-45,000 litres)
Heating Capacity (Boost Mode)	8.8 kW
Heating Capacity Range (Smart Mode)	3.5-8.8 kW (variable)
Heating Capacity Range (Eco Mode)	3.5-5.8 kW (variable)
COP Boost Mode	5.5-6.5
COP Smart Mode	5.5-10.8
COP Eco Mode	8.3-10.8
Heating & Cooling	Yes (reversible operation)
Maximum Water Temperature	45°C

Operating Conditions & Environment

Specification	Detail
Operating Temperature Range	-15°C to +43°C ambient
Minimum Water Temperature	15°C for safe operation
Maximum Operating Altitude	2000 metres
IP Protection Rating	IPX4 (splash-proof)
Noise Level (at 10m)	<40 dB(A) typical operation
Noise Level (Boost Mode certified)	<42 dB(A)
Defrost System	Independent active defrost

Electrical Specifications

Specification	Detail
Power Supply	230V AC, Single Phase, 50Hz
Maximum Power Consumption	1.7 kW
Recommended Circuit Breaker	10A Type C
Recommended Cable Size	3G 2.5 mm² (up to 34m run)
Required RCD Protection	30mA residual current device
Control Voltage	24V (internal)

Hydraulic Specifications

Specification	Detail
Water Connection Size	50mm (1.5″)
Recommended Water Flow	4 m³/h (67 litres/min)
Maximum Water Flow	7 m³/h
Minimum Water Flow	3 m³/h (flow detection below this)
Heat Exchanger Type	Titanium (corrosion-resistant)
Bypass Required	Yes (included in installation)

Refrigeration System

Specification	Detail
Refrigerant Type	R32 (HFC-32)
Refrigerant GWP	675 (68% lower than R410A)
Compressor Type	Mitsubishi/Toshiba 2D Full DC Inverter
Compressor Technology	Variable-speed inverter
Expansion Valve	Electronic (precise control)
Fan Motor	Variable-speed DC inverter
Annual Leak Check	Required (EU regulation 517/2014)

Control & Connectivity

Specification	Detail
Control Interface	WiFi TFT colour touch screen
WiFi Connectivity	Integrated (2.4GHz)
Mobile App	Smart Life (iOS & Android)
Remote Control Options	Dry contact, Modbus RS485
Pentair System Integration	Speedeo®, Soleo® VS, Intellipool®
Programmable Timers	2 independent timers
Priority Heating Relay	P1-P2 terminals (230V pump control)

Physical Dimensions & Weight

Dimension	Measurement
Width (A)	657 mm
Height (B)	977 mm
Depth (C)	397 mm
Base Width (D)	510 mm
Base Depth (E)	410 mm
Unit Weight	37 kg (dry)
Shipping Weight	Approx. 42 kg

Warranty & Compliance

Specification	Detail
Parts Warranty	3 years
Heat Exchanger Warranty	10 years (titanium)
Safety Standards	EN 60335-1, EN 60335-2-40, EN 62233
EMC Compliance	EN 55014-1, EN 55014-2, EN 61000 series
Noise Directive	2000/14/EC compliant
RoHS Compliant	Yes (2011/65/EU)
WEEE Compliant	Yes (2012/19/EU)
Pool Standard	NF-EN-16713

🌡️ Performance Data Under Different Conditions

Understanding how your heat pump performs across various weather conditions helps you plan heating schedules and set realistic expectations.

Optimal Conditions (28°C air, 80% humidity, 28°C water inlet)

Mode	Heating Capacity	Power Input	COP	Efficiency Rating
Boost	5.6 kW	1.06 kW	5.3	⭐⭐⭐⭐ Very Good
Smart	2.6-5.6 kW	Variable	5.3-6.7	⭐⭐⭐⭐⭐ Excellent
Eco	2.6-2.9 kW	Variable	5.6-6.7	⭐⭐⭐⭐⭐ Outstanding

Moderate Conditions (15°C air, 70% humidity, 28°C water inlet)

Mode	Heating Capacity	Power Input	COP	Efficiency Rating
Boost	7.3 kW	1.24 kW	5.9	⭐⭐⭐⭐⭐ Excellent
Smart	3.2-7.3 kW	Variable	5.9-10.8	⭐⭐⭐⭐⭐ Outstanding
Eco	3.2-5.8 kW	Variable	8.3-10.8	⭐⭐⭐⭐⭐ Exceptional

💡 Note: These are the most common UK operating conditions during the swimming season (April-October). The InverTemp-FL performs exceptionally well in this temperature range.

Cold Conditions (7°C air, 0% humidity, 26°C water inlet)

Mode	Heating Capacity	Power Input	COP	Efficiency Rating
Eco	2.75 kW	0.96 kW	2.86	⭐⭐⭐ Good

⚠️ Important: Performance naturally decreases in colder conditions, but the InverTemp-FL continues operating effectively down to -15°C thanks to its advanced defrost system and inverter technology.

⏱️ Estimated Pool Heat-Up Times

These calculations help you understand how long it takes to warm your pool from typical starting temperatures. Times shown are estimates based on ideal conditions with a pool cover in place.

Formula Used:

Time (hours) = (Pool Volume in m³ × Temperature Rise in °C × 1.16) ÷ Heat Pump Heating Capacity (kW)

Heat-Up Time Estimates (Boost Mode – 8.8 kW)

Pool Volume	Temperature Rise	Estimated Time	Practical Duration
30 m³	15°C → 20°C (5°C rise)	19.8 hours	2-3 days
30 m³	15°C → 25°C (10°C rise)	39.5 hours	4-5 days
30 m³	15°C → 28°C (13°C rise)	51.4 hours	5-7 days
37.5 m³	15°C → 20°C (5°C rise)	24.7 hours	3-4 days
37.5 m³	15°C → 25°C (10°C rise)	49.4 hours	5-6 days
37.5 m³	15°C → 28°C (13°C rise)	64.2 hours	6-8 days
45 m³	15°C → 20°C (5°C rise)	29.7 hours	3-4 days
45 m³	15°C → 25°C (10°C rise)	59.3 hours	6-8 days
45 m³	15°C → 28°C (13°C rise)	77.1 hours	8-10 days

Heat-Up Time Estimates (Smart Mode Average – 6.2 kW)

Pool Volume	Temperature Rise	Estimated Time	Practical Duration
30 m³	15°C → 25°C (10°C rise)	56.1 hours	5-7 days
37.5 m³	15°C → 25°C (10°C rise)	70.2 hours	7-9 days
45 m³	15°C → 25°C (10°C rise)	84.2 hours	8-11 days

Daily Temperature Maintenance

Once your pool reaches target temperature:

| Daily Heat Loss | Heat Pump Output Needed | Running Time Required | |—|—|—|—| | 1°C per day (covered pool) | 1.4-1.7 kW | 2-4 hours/day | | 2°C per day (uncovered pool) | 2.8-3.4 kW | 4-6 hours/day | | 3°C per day (windy/uncovered) | 4.2-5.1 kW | 6-8 hours/day |

💡 Pro Tips for Faster Heating:

• Use a pool cover: Reduces heat loss by up to 75% and speeds heat-up dramatically
• Run in Boost Mode initially: Switch to Smart or Eco Mode once temperature is reached
• Extend filtration hours: The heat pump only operates when water is circulating
• Start heating in advance: Begin warming your pool 7-10 days before you plan to swim
• Insulate pipes: Reduces heat loss between the unit and pool, especially for longer runs

⚠️ Important Disclaimers: These are theoretical estimates based on ideal conditions. Actual heat-up times vary significantly based on:

• Ambient air temperature and humidity
• Starting water temperature
• Wind exposure and weather conditions
• Pool cover usage (with/without)
• Pool insulation and construction type
• Operating mode selected
• Daily filtration run time
• Heat losses during night-time

In normal conditions, heat pumps typically warm pool water by 1-2°C per day when properly sized and with adequate run time.

💰 Running Cost Comparisons

Understanding the exceptional efficiency of heat pump technology compared to alternatives:

Cost to Heat 37.5m³ Pool from 15°C to 25°C (10°C rise)

Based on UK average energy prices (2024):

• Electricity: £0.24/kWh
• Natural Gas: £0.06/kWh
• LPG: £0.12/kWh

Heating Method	Energy Required	Total Cost	Efficiency	Annual Running Cost*
InverTemp-FL Heat Pump (COP 6.5)	67 kWh electric	£16.08	⭐⭐⭐⭐⭐	£120-180
Standard Electric Heater	435 kWh electric	£104.40	⭐	£780-1,040
Gas Boiler (80% efficiency)	544 kWh gas equivalent	£32.64	⭐⭐⭐	£245-325
LPG Boiler (80% efficiency)	544 kWh gas equivalent	£65.28	⭐⭐	£490-650

*Annual costs based on May-September operation, maintaining 25-28°C

💡 Cost Savings:

• Save £560-880 annually vs. direct electric heating
• Save £125-145 annually vs. gas heating
• Save £370-470 annually vs. LPG heating
• ROI typically achieved in 3-5 years depending on usage patterns

🌍 Carbon Footprint Comparison:

The InverTemp-FL produces approximately 70-80% less CO₂ than gas heating and 65-75% less than direct electric resistance heating (based on UK grid carbon intensity).

📐 Installation Requirements & Clearances

Space Requirements Around Unit

For optimal performance and maintenance access:

Location	Minimum Clearance	Recommended Clearance
Air Intake (rear & sides)	300mm	1000mm (1m)
Fan Outlet (front)	3000mm (3m)	4000mm (4m)
Service Access	500mm	800mm

Base/Foundation Requirements

Concrete Slab Dimensions:

• For IVTP-1M/2M/3M/4M: 1200mm (W) × 650mm (D)
• Minimum thickness: 100mm
• Level tolerance: ±5mm across entire base
• Must support minimum 50kg load

Installation Surface:

• Stable, solid, and perfectly level
• Capable of supporting unit weight (37kg) plus vibration forces
• Install on provided vibration-absorbing skids
• Suitable drainage for condensate (several litres per day in humid conditions)

Location Selection Guidance

✅ IDEAL LOCATIONS:

• Open area with good air circulation
• Minimum 2 metres from pool edge (NF C 15-100 requirement)
• Protected from direct spray or sprinkler systems
• Away from bedroom windows and neighbour boundaries
• South or west-facing positions for maximum solar gain on evaporator
• Well-ventilated outdoor space

❌ AVOID THESE LOCATIONS:

• Enclosed spaces or under cover
• Areas prone to snow accumulation
• Under trees (falling leaves block evaporator)
• Near sources of flammable gases or corrosive chemicals
• High-traffic areas where physical damage is possible
• Surfaces that transmit vibration to buildings
• Areas with restricted airflow

Noise Considerations

While the InverTemp-FL is exceptionally quiet, consider:

• Position fan outlet away from living spaces and neighbours
• Avoid corners where sound can reflect
• Install optional sound barriers if needed (maintain clearances)
• Use 500mm PVC flexible pipe connections to minimize vibration transmission

Hydraulic Connection Requirements

• Pipe Size: 50mm PVC
• Bypass System: Mandatory (included in installation)
• Recommended Flow Rate: 4 m³/h (67 litres/min)
• Connection Order: After filter, before chemical treatment
• Pipe Insulation: Recommended for runs exceeding 5 metres
• Isolation Valves: Required on inlet and outlet for maintenance

Electrical Installation Requirements

Required Protection:

• 30mA RCD (residual current device) – mandatory
• 10A Type C circuit breaker
• Dedicated circuit recommended

Cable Requirements:

• 3G 2.5mm² cable for runs up to 34m
• Upgrade to 3G 4mm² for runs 35-54m
• All outdoor cable must be in protective conduit
• Buried cable depth: 500mm minimum (850mm under paths/driveways)

🔧 Installation Overview (Professional Installation Required)

The Pentair InverTemp-FL requires professional installation by a qualified technician with expertise in hydraulic, electrical, and refrigeration systems. Here’s what the installation involves:

1. Site Preparation

• Pour level concrete base to specified dimensions
• Ensure proper drainage for condensate
• Prepare cable routes (buried conduit)

2. Unit Positioning

• Place unit on vibration-absorbing skids
• Secure to base with appropriate fixings (8mm lag screws for concrete)
• Verify level in both directions

3. Hydraulic Connections

• Install bypass system with three valves
• Connect 50mm PVC pipes (inlet/outlet)
• Install flow control valve
• Connect condensate drainage system
• Flush system thoroughly before connection

4. Electrical Connections

• Run power cable through protective conduit
• Connect to properly rated circuit breaker
• Verify correct phasing (critical for compressor operation)
• Install RCD protection
• Connect any optional controls (dry contact, RS485)

5. Commissioning

• Purge air from hydraulic system
• Verify pressure gauge reading matches ambient temperature
• Start filtration pump
• Power up unit and verify operation
• Adjust bypass valve for optimal water flow
• Configure WiFi connectivity
• Set operating parameters
• Test all three operating modes
• Verify P1-P2 relay function for pump control

6. Customer Handover

• Demonstrate all controls and functions
• Explain WiFi app setup
• Review maintenance requirements
• Provide documentation and warranty information

⚠️ Professional Installation Benefits:

• Ensures warranty validity
• Complies with electrical safety regulations
• Optimizes performance and efficiency
• Prevents costly operational problems
• Ensures proper refrigerant circuit integrity

🛠️ Maintenance & Care

The InverTemp-FL is designed for minimal maintenance, but regular care ensures optimal performance and longevity.

User Maintenance (Monthly)

✓ Visual Inspection

• Check evaporator fins (rear/sides) for debris, leaves, or blockage
• Remove any accumulated debris with soft brush or low-pressure water
• Verify condensate drainage is clear and functioning
• Check for any unusual noise or vibration
• Verify pressure gauge reading is within normal range

✓ Filter Maintenance

• Clean pool filter regularly to maintain proper water flow
• Poor filtration reduces heat pump efficiency significantly

✓ Water Chemistry

• Maintain proper chlorine levels (<2.5 ppm)
• Keep pH between 6.9-8.0
• During shock chlorination, isolate heat pump by closing inlet/outlet valves

Professional Maintenance (Annually)

Required by qualified technician:

✓ Electrical System Check

• Verify all connections are tight and corrosion-free
• Test earth/ground continuity
• Inspect cables for damage or deterioration
• Verify RCD operation

✓ Refrigeration System Check

• Verify pressure gauge reading correlates with ambient temperature
• Check for refrigerant leaks (mandatory EU requirement)
• Inspect compressor operation
• Test defrost cycle function

✓ Hydraulic System Check

• Inspect heat exchanger for scale or corrosion
• Verify flow rate is within specification
• Check bypass valve operation
• Inspect all pipe connections for leaks

✓ Component Check

• Test fan motor operation across all speeds
• Verify all sensors are reading correctly
• Inspect control board for any fault codes
• Test WiFi connectivity
• Verify timer operation

Winterization (End of Season)

If you close your pool for winter:

1. Power Down: Turn off and disconnect electrical supply
2. Isolate: Close inlet and outlet valves, open bypass fully
3. Drain: Remove water from heat exchanger (unscrew unions)
4. Protect: Loosely reconnect unions to prevent debris entry
5. Cover: Install provided winter protection cover
6. Store: Keep dry and protected from weather

💡 Note: If your pool remains operational year-round, the InverTemp-FL can continue operating down to -15°C ambient temperature.

Cleaning Guidelines

✓ Cabinet Cleaning

• Use soft damp cloth (microfiber ideal)
• Never use abrasive cleaners or solvents
• Avoid high-pressure washers

✓ Evaporator Cleaning

• Use soft brush vacuum or soft brush only
• Low-pressure water rinse acceptable
• Never use high-pressure washer (damages fins)
• Clean at least once during season, more often if near trees

Warranty Maintenance Requirements

To maintain warranty validity:

• Annual professional inspection required
• Keep service records
• Use only qualified technicians for repairs
• Follow all operating guidelines
• Maintain proper water chemistry
• Report any issues promptly

❓ Frequently Asked Questions

Q1: How long does it take to heat my pool?

A: For a 30-45m³ pool, expect 5-10 days for initial heat-up from 15°C to 25-28°C when running in Boost Mode with adequate daily filtration hours (8-12 hours minimum). Once at temperature, the unit typically maintains it with 4-8 hours daily operation. Using a pool cover dramatically reduces heat-up time and ongoing running costs. Actual time varies significantly based on ambient temperature, pool insulation, cover usage, and wind exposure.

Q2: What size pool is this heat pump suitable for?

A: The InverTemp-FL is optimally sized for pools between 30-45 cubic metres (30,000-45,000 litres). This typically corresponds to pools approximately 8m × 4m × 1.5m average depth, though exact dimensions vary. For pools below 30m³, the unit will be oversized but still function efficiently. For pools larger than 45m³, consider the next model up (IVTP-3M-FL or larger) for adequate heating capacity.

Q3: How much does it cost to run?

A: Running costs depend on usage patterns, ambient temperature, and whether you use a pool cover. As a guide for UK electricity prices (£0.24/kWh), expect approximately £120-180 per season (May-September) to maintain 25-28°C in a 37m³ covered pool. This assumes 4-6 hours daily operation in Smart Mode. Without a cover, costs can double. The InverTemp-FL is approximately 5-6 times cheaper to run than direct electric heating and 25-30% cheaper than gas heating when operating in optimal conditions.

Q4: How quiet is this heat pump compared to others?

A: The InverTemp-FL is exceptionally quiet with certified noise levels below 42 dB(A) at 10 metres – comparable to a whisper or library environment. In Eco Mode, it’s even quieter at around 25-30 dB(A). For comparison, normal conversation measures 60 dB(A) and most standard heat pumps operate at 50-55 dB(A). The full inverter technology and variable-speed fan allow it to run at lower speeds when full power isn’t needed, making it ideal for noise-sensitive residential environments.

Q5: Can I control it from my smartphone?

A: Yes, absolutely. The InverTemp-FL features integrated WiFi and works with the free Smart Life app (available for both iOS and Android). After simple initial setup connecting to your home WiFi, you can monitor pool temperature, adjust settings, switch between operating modes, view performance data, set timers, and receive alerts from anywhere with internet access. The unit also has a colour TFT touch screen on the unit itself for local control.

Q6: What is COP and why does it matter?

A: COP (Coefficient of Performance) measures efficiency. A COP of 6.0 means the heat pump produces 6 kW of heating for every 1 kW of electricity consumed – essentially 600% efficiency. The InverTemp-FL achieves COP ratings from 5.5 up to an exceptional 10.8 depending on operating conditions and mode. Higher COP means lower running costs. Traditional electric heaters have a COP of 1.0 (100% efficiency), and gas boilers typically achieve 0.8-0.9 (80-90% efficiency), making heat pumps by far the most cost-effective heating option.

Q7: Will it work in cold UK weather?

A: Yes, exceptionally well. The InverTemp-FL operates effectively in ambient temperatures from -15°C to +43°C. It features an independent active defrost system that automatically removes ice buildup on the evaporator during cold conditions. While heating capacity and efficiency naturally decrease in colder weather (this is true for all heat pumps), the unit continues functioning when many competitors would shut down. It’s particularly well-suited to the UK climate with typical swimming season temperatures of 10-25°C where it performs optimally.

Q8: Do I need to use a pool cover?

A: While not mandatory, a pool cover is highly recommended and will dramatically improve performance. An uncovered pool loses 4 times more heat than a covered pool, primarily through evaporation. Using a cover reduces heat loss by 70-80%, meaning your heat pump runs 70-80% less to maintain temperature – directly translating to similar cost savings. A pool cover also speeds initial heat-up time substantially. For maximum efficiency and lowest running costs, always cover your pool when not in use.

Q9: Is R32 refrigerant safe and environmentally friendly?

A: Yes, R32 is both safer and more environmentally responsible than older refrigerants. It has a Global Warming Potential (GWP) of 675 – 68% lower than the R410A used in many older heat pumps. R32 also has zero Ozone Depletion Potential. While classified as mildly flammable (A2L), the quantities used and safety systems in place make it extremely safe in residential applications. R32 is the refrigerant of choice for modern heat pumps due to its superior environmental profile and excellent thermal properties.

Q10: What warranty is included?

A: The InverTemp-FL comes with comprehensive warranty coverage:

• 3 years on all parts and components
• 10 years on the titanium heat exchanger (the most critical and expensive component)

Warranty validity requires professional installation by a qualified technician and annual maintenance inspections. The extended 10-year warranty on the titanium heat exchanger demonstrates Pentair’s confidence in the durability and corrosion-resistance of this premium component. Keep all service records and operate the unit according to guidelines to maintain warranty coverage.

Q11: Can I install it myself to save money?

A: No, professional installation is required and strongly recommended. The InverTemp-FL involves hydraulic connections, electrical wiring, and refrigeration components that require specific expertise. Installation must comply with local electrical regulations (including NF C 15-100 in France/EU), proper earthing requirements, 30mA RCD protection, and refrigerant handling regulations. DIY installation will void your warranty, may create safety hazards, likely result in poor performance, and could be illegal depending on local regulations. Professional installation ensures safety, optimal performance, compliance, and warranty validity.

Q12: What’s the difference between the three operating modes?

A:

ECO Mode prioritizes efficiency and silence:

• Operates at 30-60% capacity
• Achieves COP up to 10.8
• Whisper-quiet operation
• Best for overnight running or maintaining temperature once reached
• Lowest electricity costs

SMART Mode automatically optimizes:

• Varies between 30-100% capacity based on conditions
• Balances power, efficiency, and noise automatically
• Adapts to ambient temperature and pool temperature differential
• Best for day-to-day operation
• Recommended for most users

BOOST Mode delivers maximum heating:

• Operates at 85-100% capacity
• Heats your pool as quickly as possible
• Still efficient with COP 5.5-6.5
• Best for initial heat-up or rapid temperature recovery
• Slightly louder operation but still quiet

Most users find SMART Mode ideal for regular operation, with BOOST for initial season heat-up.

🚚 Delivery & Installation

Delivery Information:

• Free UK mainland delivery on this product
• Unit ships on pallet and must be kept upright at all times
• Signature required upon delivery
• Typical delivery: 3-5 working days from order
• Kerbside delivery included

Installation Services: Professional installation services available through our approved installer network. Contact us for a quote and to arrange survey and installation. Installation typically takes 4-6 hours for standard installations.

🏆 Why Buy from Parts4Tubs?

✅ Authorized Pentair Dealer – Full manufacturer warranty support ✅ Expert Knowledge – Specialist advice for your specific requirements ✅ Competitive Pricing – Best value on premium pool equipment ✅ Fast Delivery – Quick dispatch and reliable UK delivery ✅ Comprehensive Support – Pre and post-sale technical assistance ✅ Installation Services – Access to approved installer network ✅ Quality Assured – Only genuine Pentair products ✅ Customer Focused – Thousands of satisfied customers

💚 Environmental Commitment

Energy Efficiency: A-rated energy performance dramatically reduces electricity consumption compared to traditional heating methods

Sustainable Refrigerant: R32 with 68% lower global warming potential than older refrigerants

Long Service Life: Premium components and 10-year heat exchanger warranty minimize replacement frequency

Recyclable: Fully recyclable at end of life through WEEE-compliant programs

Carbon Reduction: Reduces CO₂ emissions by 70-80% compared to gas or electric resistance heating

🔑 Key Takeaways

The Pentair InverTemp-FL represents the cutting edge of residential pool heating technology:

🌊 Perfect Pool Size: Optimized for 30-45m³ pools 🔇 Ultra-Quiet: <42 dB(A) – Won’t disturb you or neighbours ⚡ Highly Efficient: COP up to 10.8 means minimal running costs 📱 Smart Control: WiFi connectivity with smartphone app 💚 Eco-Friendly: R32 refrigerant and exceptional efficiency 🛡️ Premium Quality: Titanium heat exchanger with 10-year warranty ❄️ Year-Round Capable: Operates from -15°C to +43°C 💰 Cost-Effective: 70-80% cheaper than electric heating, 25-30% cheaper than gas 🎛️ Three Modes: ECO, SMART, and BOOST for every situation ✅ Peace of Mind: 3-year comprehensive warranty plus extended heat exchanger coverage

Ready to enjoy your pool year-round with whisper-quiet, cost-effective heating?

⚠️ IMPORTANT NOTES:

• Professional installation required – DIY installation voids warranty
• Use of a pool cover reduces running costs by up to 75%
• Heat-up times are estimates based on ideal conditions
• Actual performance varies with weather, pool size, insulation, and usage
• Minimum 15°C water temperature required for safe operation
• Annual professional maintenance required for warranty validity
• Refrigerant leak checks mandatory under EU regulation 517/2014