🌊 Pentair InverTemp-FL Heat Pump for 55-70m³ Pools – Ultra-Quiet Full Inverter Technology

Whisper-quiet power meets intelligent efficiency. The Pentair InverTemp-FL delivers year-round comfort for larger residential pools with advanced full inverter technology, achieving sound levels below 42 dB(A) while maintaining exceptional energy efficiency with COP ratings up to 11.2.

Experience the perfect balance of powerful performance and peaceful operation. This premium heat pump is engineered for homeowners who demand the best – combining cutting-edge inverter technology with eco-friendly design to heat and cool your 55-70m³ pool efficiently throughout the year, even in temperatures as low as –15°C.

Key Benefits:

✅ Ultra-Quiet Operation – Among the quietest in its class at <42 dB(A), perfect for residential areas

✅ Exceptional Efficiency – COP up to 11.2 delivers outstanding energy savings

✅ Smart WiFi Control – Monitor and adjust settings remotely via the Smart Life app

✅ Year-Round Performance – Operates in outdoor temperatures from –15°C to +43°C

✅ Premium Build Quality – High-grade titanium heat exchanger with 10-year warranty

✅ Eco-Friendly – Uses R32 refrigerant for lower environmental impact

🎯 Top Features at a Glance

Full Inverter Technology The InverTemp-FL automatically adjusts both compressor and fan speed to optimize performance, delivering smooth operation that reduces mechanical stress and extends equipment life. This intelligent system maintains consistent water temperature while minimizing energy consumption – far exceeding the efficiency of traditional heat pumps.

Three Intelligent Operating Modes

• ECO Mode – Maximum efficiency (COP 8.5-11.2) with minimal noise for overnight operation
• SMART Mode – Automatically adapts to conditions, balancing power and sound levels
• BOOST Mode – Maximum heating power (12.8 kW) for rapid temperature increases

Smart Connectivity Integrated WiFi TFT touch screen provides intuitive local management, while remote access through the Smart Life app (iOS & Android) lets you control your pool temperature from anywhere. Compatible with Pentair automation systems including Speedeo®, Soleo® VS, and Intellipool® via Modbus RS485 interface.

Durable & Sustainable Design Built to last with a corrosion-resistant titanium heat exchanger backed by a 10-year warranty. The active defrost system ensures consistent operation even in low temperatures, while R32 refrigerant offers higher efficiency and significantly lower environmental impact compared to traditional refrigerants.

📄 Downloads & Documentation

Installation & Operation Manual (opens in new tab) Download Pentair InverTemp-FL Complete Manual (PDF)

This comprehensive manual includes detailed installation instructions, hydraulic and electrical connection diagrams, operating procedures, maintenance schedules, troubleshooting guides, circuit diagrams, and complete technical specifications. Essential reading for installers and owners – includes safety instructions, winterization procedures, and warranty information.

📊 Complete Technical Specifications

Specification	Detail
Pool Capacity	55–70 m³ (recommended)
Compressor Type	Full Inverter (Mitsubishi/Toshiba 2D)
Refrigerant	R32 (low GWP, eco-friendly)
Heat Exchanger	Titanium (10-year warranty)
Operating Temperature Range	–15°C to +43°C ambient
Maximum Water Temperature	45°C
Control Interface	WiFi TFT Touch Screen
Noise Level	<42 dB(A) at 10m (certified)
Power Supply	Single Phase 230V, 50Hz
Hydraulic Connection	1.5″ / 50mm
Protection Rating	IPX4
Dimensions (mm)	A: 657, B: 977, C: 398, D: 510
Weight	53 kg
Warranty	3 years parts / 10 years heat exchanger

Performance Data by Operating Conditions

At 28°C Air / 80% Humidity / 28°C Water Temperature:

Mode	Heating Capacity	COP	Power Consumption
BOOST Mode	11.5 kW	5.1	~2.3 kW
SMART Mode	4.2 – 11.5 kW	6.7 – 4.2	Variable
ECO Mode	4.2 – 6.7 kW	6.7 – 5.7	~0.7 kW

At 15°C Air / 70% Humidity / 28°C Water Temperature:

Mode	Heating Capacity	COP	Power Consumption
BOOST Mode	9.8 kW	4.7	~2.1 kW
SMART Mode	3.7 – 9.8 kW	7.0 – 4.5	Variable
ECO Mode	3.7 – 7.8 kW	7.0 – 5.5	~0.7 kW

At 7°C Air / 0% Humidity / 26°C Water Temperature:

Performance Metric	Value
Heating Capacity	5.45 kW
COP	3.64
Sound Pressure (at 10m)	26.9 dB(A)

🏊 Pool Sizing & Suitability Guide

Ideal Pool Capacity: 55–70 cubic metres

This heat pump is specifically engineered for residential pools within this volume range. For optimal performance and efficiency, your pool size should fall within these parameters.

How to Calculate Your Pool Volume:

Rectangular Pool: Length (m) × Width (m) × Average Depth (m) = Volume (m³)

Round Pool: π × Radius² (m) × Average Depth (m) = Volume (m³)

Oval Pool: π × Length (m) × Width (m) × Average Depth (m) ÷ 4 = Volume (m³)

Example Pool Sizes:

• 8m × 4m × 2m deep = 64m³ ✅ Perfect match
• 10m × 6m × 1.2m deep = 72m³ ✅ Suitable (upper range)
• 7m × 3.5m × 2.2m deep = 54m³ ✅ Suitable (lower range)

⏱ Estimated Heat-Up Times

How fast will my pool heat up? These estimates help you plan your pool season and understand expected performance. Actual times vary based on ambient temperature, wind conditions, pool insulation, and whether you use a pool cover.

Heat-Up Time Calculator (BOOST Mode at 15°C Air Temperature)

Using the heating capacity of 9.8 kW at 15°C ambient conditions:

Pool Volume	Temperature Rise	Estimated Time	Daily Progress
55 m³	5°C (15°C → 20°C)	33 hours	1.5°C per day*
60 m³	5°C (15°C → 20°C)	36 hours	1.4°C per day*
65 m³	5°C (15°C → 20°C)	39 hours	1.3°C per day*
70 m³	5°C (15°C → 20°C)	42 hours	1.2°C per day*
60 m³	8°C (15°C → 23°C)	57 hours	2.3°C per day*
60 m³	10°C (15°C → 25°C)	71 hours	2.8°C per day*

*Based on continuous 24-hour operation with a pool cover

Formula Used:

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

⚠ Important Notes:

• Estimates assume continuous operation with a pool cover
• A pool cover is essential – uncovered pools lose up to 4× more heat
• Actual performance varies with weather conditions, humidity, and wind
• Warmer ambient temperatures improve efficiency and reduce heating time
• Initial heat-up takes longer; maintaining temperature requires less energy
• These calculations use 15°C ambient temperature performance data

💰 Running Cost & Efficiency Comparison

Why Full Inverter Technology Saves You Money:

The InverTemp-FL’s exceptional COP ratings mean you get significantly more heat output per unit of electricity consumed compared to traditional heating methods.

Comparative Efficiency Analysis:

Coefficient of Performance (COP) Explained: COP measures efficiency – a COP of 5.0 means you get 5 kW of heating for every 1 kW of electricity used.

Heating Method	Typical COP	Efficiency	Cost to Heat
InverTemp-FL (Smart Mode)	5.6 – 11.2	Exceptional	Lowest ✅
InverTemp-FL (Boost Mode)	4.5 – 6.8	Excellent	Very Low ✅
Standard Heat Pump	3.0 – 4.5	Good	Moderate
Electric Resistance Heater	1.0	Poor	Very High ❌
Gas Heater	0.8 – 0.9	Poor	High ❌

Real-World Savings Example: Maintaining a 60m³ pool at 26°C during the swim season (May-September in UK):

• InverTemp-FL (avg COP 6.5): £250-400 per season
• Standard heat pump (COP 4.0): £400-650 per season
• Electric heater (COP 1.0): £1,600-2,600 per season

Estimates based on typical UK electricity rates and weather patterns. Actual costs vary by location, usage, and energy tariffs.

🔧 Installation Requirements

Space Requirements:

• Front (fan outlet): 3m clearance minimum
• Rear & Sides (air intake): 1m clearance minimum (30cm absolute minimum)
• Base: Stable, level concrete pad – minimum 1300mm × 700mm
• Access: Sufficient space for maintenance operations

Hydraulic Connection:

• 50mm (1.5″) PVC pipe connections required
• Install after the filter and before any treatment systems
• Bypass system required for maintenance access
• Water flow rate: 5-7 m³/h (approximately 100 L/min) optimal

Electrical Requirements:

• 230V Single Phase, 50Hz supply
• Maximum current draw: 13.5 A
• 30mA RCD protection required
• Recommended cable: 3G 2.5mm² (up to 25m run)
• Class C circuit breaker: 20A rating
• Professional installation required

Environmental Considerations:

• Do not install under trees or near sprinkler systems
• Avoid locations subject to snow accumulation
• Position away from sources of heat or flammable gas
• Ensure adequate drainage for condensate water
• Direct fan outlet away from pools and neighboring properties

🛠 Smart Features & Controls

Intuitive WiFi TFT Touch Screen Crystal-clear interface displays current water temperature, target temperature, operating mode, and system status at a glance. Access all settings, timers, and diagnostics directly from the unit.

Smart Life Mobile App Control Download the free Smart Life app for iOS or Android to:

• Monitor pool temperature remotely from anywhere
• Adjust temperature settings on the go
• Switch between ECO, SMART, and BOOST modes
• Set heating schedules and timers
• Receive notifications and alerts
• View energy consumption data

Advanced Integration Options Compatible with Pentair’s premium automation systems:

• Speedeo® variable speed pump integration
• Soleo® VS intelligent circulation system
• Intellipool® complete pool automation
• Modbus RS485 interface for custom automation

Priority Heating Function Connect your filtration pump to automatically force operation when water temperature drops below your set point, ensuring your pool is always ready when you are.

✅ What Makes the InverTemp-FL Different?

Full Inverter vs. Traditional On/Off Heat Pumps:

Traditional heat pumps operate in simple on/off cycles – they’re either running at full power or completely off. This creates temperature fluctuations, increases energy consumption, and causes more mechanical wear.

The InverTemp-FL is smarter:

• Continuously adjusts compressor speed from 30% to 100% capacity
• Variable-speed fan automatically optimizes airflow
• Maintains precise water temperature with minimal fluctuation
• Reduces electrical spikes and current draw
• Extends equipment lifespan through reduced mechanical stress
• Dramatically quieter operation than fixed-speed models

The Result: Consistent comfort, lower running costs, and whisper-quiet operation that won’t disturb you or your neighbors.

🔇 Ultra-Quiet Operation

At <42 dB(A), the InverTemp-FL is quieter than:

• Normal conversation (60 dB)
• A quiet library (40 dB)
• A refrigerator humming (40-50 dB)

Sound Level Reference:

Sound Source	Decibel Level
Whisper	30 dB
InverTemp-FL ECO Mode	24-28 dB ✅
InverTemp-FL BOOST Mode	<42 dB ✅
Quiet library	40 dB
Normal conversation	60 dB
Vacuum cleaner	70 dB

Why It’s So Quiet:

• Advanced soundproof cabinet panels
• Variable-speed fan reduces air turbulence
• Full inverter compressor operates smoothly without cycling
• Optimized airflow design minimizes resistance and noise

Perfect for residential installations where noise control is essential. Run your heat pump overnight in ECO mode without disturbing sleep.

🌍 Eco-Friendly R32 Refrigerant

Why R32 Matters:

The InverTemp-FL uses R32 refrigerant, representing the latest advancement in eco-friendly cooling technology.

R32 Benefits:

• Lower Global Warming Potential (GWP): 675 vs. 2088 for older R410A
• Higher Efficiency: Delivers better heat transfer properties
• Reduced Refrigerant Charge: Less fluid needed for same performance
• Easier Recycling: Simpler chemical structure aids proper disposal
• EU Compliant: Meets strict European environmental regulations

Environmental Commitment: By choosing the InverTemp-FL, you’re selecting a heat pump designed for the future – delivering exceptional performance while minimizing environmental impact.

🧰 Maintenance & Winterization

Annual Maintenance (Essential): ✓ Clean evaporator fins with soft brush or gentle water stream ✓ Inspect electrical connections and terminals ✓ Verify pressure gauge readings against temperature chart ✓ Check for refrigerant leaks (professional inspection required annually per EU regulations) ✓ Clean or replace air filters ✓ Verify proper water flow rate and bypass settings

Winterization Procedure: When closing your pool for winter, proper winterization protects your investment:

1. Power down the unit completely
2. Close inlet and outlet valves
3. Open bypass valve fully
4. Disconnect hydraulic unions to drain all water from the heat pump
5. Loosely reconnect unions to prevent debris entry
6. Cover unit with provided winterization blanket
7. Ensure condensate drainage is clear

Important: Never allow water to freeze inside the heat pump – this can cause catastrophic damage and void your warranty.

❓ Frequently Asked Questions

Q: What size pool is this heat pump suitable for? A: The InverTemp-FL is designed for pools between 55-70 cubic metres. This typically covers residential pools ranging from approximately 7m × 3.5m × 2m to 10m × 6m × 1.2m in various shapes.

Q: How long will it take to heat my pool? A: This depends on your pool volume, starting temperature, and weather conditions. As a general guide, expect 1-2°C temperature increase per day with continuous operation and a pool cover. Initial heat-up from 15°C to 25°C for a 60m³ pool takes approximately 3 days in favorable conditions.

Q: Can this heat pump cool my pool as well as heat it? A: Yes! The InverTemp-FL provides both heating and cooling functions. This is particularly useful in hot climates or during heat waves when you want to lower water temperature for more comfortable swimming.

Q: Will this work in winter? A: The unit operates effectively down to –15°C ambient temperature, though heating capacity reduces in colder conditions. It’s designed primarily for pool season use (spring through autumn). For year-round heated pools, consider additional heating supplementation in extreme cold.

Q: How much does it cost to run? A: Running costs depend on your electricity tariff, desired water temperature, pool size, and weather. With an average COP of 6.0, you’ll achieve approximately 6 kW of heating for every 1 kW of electricity consumed – making it 5-6 times more efficient than electric resistance heaters. Typical seasonal costs: £250-400 for maintaining temperature May-September in the UK.

Q: How loud is the heat pump? A: At less than 42 dB(A) in Boost mode and as low as 24 dB(A) in ECO mode, the InverTemp-FL is among the quietest heat pumps available. It’s quieter than normal conversation and comparable to a whisper or quiet library.

Q: Do I need a professional to install this? A: Yes, professional installation is required and highly recommended. The installer must have expertise in hydraulics, electrical systems, and refrigeration. Proper installation ensures optimal performance, safety, and warranty compliance.

Q: What maintenance is required? A: Minimal routine maintenance: keep the evaporator clean, check water chemistry stays within recommended parameters, and schedule annual professional inspection. The titanium heat exchanger is extremely durable and backed by a 10-year warranty.

Q: What’s the difference between the operating modes? A: ECO Mode maximizes efficiency and minimizes noise (COP up to 11.2) – ideal for overnight operation and maintaining temperature. SMART Mode automatically balances power and efficiency based on conditions. BOOST Mode delivers maximum heating power (12.8 kW) for rapid temperature increases when you need heat quickly.

Q: Is a pool cover necessary? A: While not absolutely required, a pool cover is highly recommended and dramatically improves efficiency. An uncovered pool loses up to 4 times more heat than a covered one. A simple bubble cover or automatic roller shutter will significantly reduce heating costs and heat-up times.

Q: What warranty is included? A: The InverTemp-FL comes with a comprehensive 3-year parts warranty and an exceptional 10-year warranty on the titanium heat exchanger, demonstrating Pentair’s confidence in build quality and durability.

Q: Can I control it from my smartphone? A: Absolutely! The built-in WiFi connects to the free Smart Life app (iOS and Android), allowing you to monitor and adjust temperature, change modes, and set schedules from anywhere with internet access.

Q: What chemicals can I use with this heat pump? A: The titanium heat exchanger is compatible with all standard pool treatment methods including chlorine, bromine, salt chlorination, and automated chemical dosing systems. Maintain chlorine below 2.5 ppm and pH between 6.9-8.0. During shock treatments, isolate the heat pump temporarily.

🏆 Why Buy from Parts4Tubs?

Authorized Pentair Dealer – Genuine products with full manufacturer warranty Expert Support – Knowledgeable team available for technical advice Quality Guaranteed – All equipment tested and certified Fast Delivery – Quick dispatch throughout the UK Installation Support – Can recommend qualified installers in your area

📝 Important Safety & Compliance Information

⚠ Professional Installation Required – This heat pump must be installed by a qualified technician with expertise in electrical, hydraulic, and refrigeration systems.

⚠ Electrical Safety – Must be protected by 30mA RCD. All electrical work must comply with BS 7671 (UK Wiring Regulations) and local building codes.

⚠ Refrigerant Regulations – Annual leak checking required per EU Regulation 517/2014. R32 is classified as A2L (mildly flammable) – proper handling by certified technicians only.

⚠ Water Safety – Install minimum 2 metres from pool edge per NF C 15-100 standards and UK pool regulations.

✅ CE Certified – Complies with all relevant EU directives for safety, EMC, noise, RoHS, and WEEE.

🎯 Technical Summary: Is This the Right Heat Pump for You?

Choose the InverTemp-FL if you have: ✅ A pool between 55-70 cubic metres ✅ Residential location where quiet operation is important ✅ Desire for maximum energy efficiency and lower running costs ✅ Interest in smart home integration and remote control ✅ Need for both heating and cooling capabilities ✅ Commitment to eco-friendly pool equipment

This heat pump excels at: ✅ Maintaining consistent pool temperature throughout the season ✅ Rapid heat-up when needed (BOOST mode) ✅ Ultra-quiet operation that won’t disturb neighbors ✅ Exceptional energy efficiency for low running costs ✅ Year-round operation in moderate to cold climates ✅ Smart, automated temperature management

🚀 Get Started Today

Transform your pool into a year-round oasis of comfort with the Pentair InverTemp-FL. Experience the perfect combination of power, efficiency, and whisper-quiet operation that makes this heat pump the smart choice for discerning pool owners.

Ready to upgrade your pool heating? Add to basket now or contact our expert team for personalized advice on sizing, installation, and operation.