🌊 Poolex SilverLine Fi 90 Full Inverter Pool Heat Pump with WiFi – Ultra-Efficient Pool Heating & Cooling

Transform your swimming experience with year-round comfort and whisper-quiet operation

The Poolex SilverLine Fi 90 represents the pinnacle of pool heating technology, combining Full Inverter efficiency with advanced climate control to deliver exceptional performance while reducing your electricity costs by up to 30%. Perfect for pools ranging from 40-50m³, this premium heat pump maintains your ideal water temperature throughout the swimming season – and beyond.

🎯 Key Features That Set This Heat Pump Apart

Full Inverter Technology – The Smart Way to Heat

Unlike traditional on/off heat pumps, the SilverLine Fi 90’s Full Inverter system continuously adjusts both compressor and fan speed to match your exact heating requirements. This means:

• Dramatically reduced electricity consumption – up to 30% lower running costs
• More consistent water temperatures – no temperature fluctuations
• Quieter operation – variable speed runs at lower noise levels
• Extended equipment lifespan – reduced wear from fewer start/stop cycles

Three Intelligent Operating Modes

🚀 Boost Mode – Maximum heating power when you need rapid temperature recovery
🌿 Eco Silence Mode – Ultra-quiet operation as low as 37 dB(A) for peaceful environments
⚡ Auto Mode – Intelligent balance between performance and efficiency

Premium Titanium Twisted Tech© Heat Exchanger

The heart of this system features a revolutionary titanium coil that resists:

• Chlorine damage
• Salt corrosion (ideal for salt chlorinator systems)
• Chemical wear from all pool treatment methods

This advanced design ensures faster heat transfer and longer equipment life compared to standard exchangers.

Built-In WiFi Control – Smart Pool Management

Control your pool heating from anywhere using the Smart Life app (iOS/Android):

• Set target temperatures remotely
• Switch between heating and cooling modes
• Create automated schedules and timers
• Monitor real-time pool temperature
• Receive operational alerts
• Compatible with Amazon Alexa and Google Home

Exceptional Quiet Operation

Noise levels that won’t disturb your outdoor living:

• 37-51 dB(A) at 1 meter in Full Inverter mode
• 19-30 dB(A) at 10 meters – comparable to rustling leaves
• Eco Silence mode reduces noise even further for nighttime operation

Why Choose the SilverLine Fi 90?

✅ Exceptional Energy Efficiency – COP ratings up to 13.9 mean you get nearly 14kW of heating for every 1kW of electricity used
✅ Ultra-Quiet Operation – From just 19 dB(A) at 10 meters in Eco Silence mode – quieter than a whisper
✅ Year-Round Performance – Operates reliably in temperatures from -7°C to 43°C
✅ Smart WiFi Control – Manage your pool temperature from anywhere using the Smart Life app
✅ Built to Last – Corrosion-resistant titanium heat exchanger with 15-year warranty against chemical corrosion
✅ Versatile Heating & Cooling – Three operating modes adapt to your exact needs

📊 Complete Technical Specifications

Performance Data

Test Conditions	Specification	Value
Air 26°C / Water 26°C / Humidity 80%
Maximum Heating Output		9.2 kW
Minimum Heating Output		2.23 kW
Power Consumption		1.46 kW
Coefficient of Performance (COP)		6.3 – 13.9
Air 15°C / Water 26°C / Humidity 70%
Maximum Heating Output (Cold Air)		6.4 kW
Minimum Heating Output (Cold Air)		1.4 kW
Power Consumption (Cold Air)		1.44 kW
COP (Cold Air Conditions)		4.4 – 6.3
Cooling Performance (Air 35°C / Water 27°C)
Maximum Cooling Capacity		4.0 kW
Power Consumption (Cooling)		1.04 kW
EER (Energy Efficiency Ratio)		3.8

Electrical & Operating Parameters

Specification	Details
Electrical Supply	230V / 50Hz Single-phase
Maximum Power Draw	1.83 kW
Maximum Current	8.5 A
Recommended Circuit Protection	16A D-curve circuit breaker
Cable Requirement	RO2V 3×2.5mm² (up to 10m length)
Heating Temperature Range	15°C – 40°C
Operating Temperature Range	-7°C – 43°C (ambient air)
Cooling Temperature Range	8°C – 28°C
Protection Rating	IPX4 (water-resistant)

Physical Specifications

Specification	Details
Dimensions (L × W × H)	907 × 334 × 656 mm
Packaged Dimensions	969 × 404 × 778 mm
Unit Weight	37.5 kg
Hydraulic Connections	50mm (1½ inch) PVC fittings
Water Flow Rate	3-4 m³/hour
Noise Level at 1m	37-51 dB(A) (Inverter mode)
Noise Level at 10m	19-30 dB(A) (Inverter mode)
Fan Direction	Horizontal airflow
Cabinet Material	ABS (UV-resistant)

Refrigeration System

Component	Specification
Refrigerant Type	R32 (environmentally friendly)
Refrigerant Mass	0.45 kg
Compressor Type	Hermetic Rotary DC Inverter
Compressor Brand	GMCC (Toshiba technology)
Heat Exchanger	Twisted Tech© Titanium coil in PVC tank
Fan Motor	DC Inverter (variable speed)

🏊 Pool Sizing & Performance Guide

Recommended Pool Volumes

The SilverLine Fi 90 is optimally sized for pools between 40-50m³ (cubic meters). To calculate your pool volume:

Rectangular Pools: Length (m) × Width (m) × Average Depth (m) = Volume (m³)
Round Pools: 3.14 × Radius² (m) × Average Depth (m) = Volume (m³)
Oval Pools: 3.14 × Length/2 (m) × Width/2 (m) × Average Depth (m) = Volume (m³)

Example Pool Sizes (40-50m³ Range)

Pool Dimensions	Volume	Suitability
8m × 4m × 1.5m depth	48m³	✅ Ideal
10m × 4m × 1.2m depth	48m³	✅ Ideal
9m × 4m × 1.4m depth	50.4m³	✅ Optimal
6m × 4m × 1.5m depth	36m³	✅ Good (undersized – will heat faster)
12m × 5m × 1.5m depth	90m³	❌ Too large (consider Fi 150 or Fi 200)

💡 Pro Tip: For above-ground pools or pools in exposed locations with significant heat loss, consider choosing a model sized for the next capacity up.

📄 Product Documentation & Downloads

Access comprehensive technical information and installation guides for your Poolex SilverLine Fi 90:

📥 Installation & User Manual (opens in new tab)
Complete 39-page manual covering installation procedures, electrical connections, hydraulic setup, WiFi configuration, operation instructions, maintenance schedules, troubleshooting guides, and warranty information. Essential reading for installers and owners.

📥 Technical Specification Sheet (opens in new tab)
Detailed product datasheet with performance specifications, COP ratings at various temperatures, noise levels, dimensions, and comparison across the entire SilverLine Fi range (70/90/120/150/200 models).

⏱️ Heat-Up Time Estimates

Understanding how quickly your pool will heat helps set realistic expectations. Heat-up times depend on several factors including starting temperature, target temperature, ambient conditions, and whether your pool is covered.

Heat-Up Time Calculation Formula

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

Note: Using 6.4 kW rating (Air 15°C / Water 26°C conditions) for conservative estimates

Estimated Heat-Up Times for Various Pool Sizes

For 40m³ Pool:

Temperature Rise	Estimated Time	Daily Progress
5°C rise (e.g., 15°C → 20°C)	36 hours	+1.5°C per day
10°C rise (e.g., 15°C → 25°C)	73 hours	+1.5°C per day
15°C rise (e.g., 10°C → 25°C)	109 hours	+1.5°C per day

For 45m³ Pool:

Temperature Rise	Estimated Time	Daily Progress
5°C rise (e.g., 15°C → 20°C)	41 hours	+1.3°C per day
10°C rise (e.g., 15°C → 25°C)	82 hours	+1.3°C per day
15°C rise (e.g., 10°C → 25°C)	122 hours	+1.3°C per day

For 50m³ Pool:

Temperature Rise	Estimated Time	Daily Progress
5°C rise (e.g., 15°C → 20°C)	46 hours	+1.2°C per day
10°C rise (e.g., 15°C → 25°C)	91 hours	+1.2°C per day
15°C rise (e.g., 10°C → 25°C)	137 hours	+1.2°C per day

⚠️ Important Disclaimers:

• These are theoretical estimates based on continuous operation in moderate conditions
• Actual performance varies based on ambient temperature, humidity, wind, pool cover usage, and insulation
• Using a pool cover can reduce heat-up time by 50-80% by preventing evaporative heat loss
• Warmer ambient temperatures significantly improve heating speed
• Initial heat-up from cold water takes longer than maintaining temperature

Maximizing Heating Efficiency

🛡️ Use a Pool Cover – Prevents up to 80% of heat loss through evaporation. This is the single most effective way to reduce heating time and running costs.

🏠 Insulate Above-Ground Pools – Add insulation around the pool walls to minimize heat loss.

☀️ Heat During Warmer Hours – The heat pump performs best when ambient temperatures are higher (daytime heating is more efficient).

🌡️ Maintain Temperature – Once at target temperature, the heat pump uses minimal energy to maintain it – much less than initial heat-up.

💰 Running Cost Estimates

One of the most attractive features of the SilverLine Fi 90 is its exceptional efficiency, translating to low running costs.

Energy Efficiency Explained

The Coefficient of Performance (COP) tells you how much heating energy you get for each unit of electricity consumed. At optimal conditions (26°C ambient), this unit achieves a COP of 13.9, meaning:

For every 1 kW of electricity consumed, you receive 13.9 kW of heating power.

Estimated Daily Running Costs

Based on average UK electricity rate of £0.25 per kWh (adjust for your actual rate):

Maintaining Temperature (typical usage):

• Average power consumption: 0.7-1.0 kW
• Running 6-8 hours per day: £1.05 – £2.00 per day
• Monthly cost: £30 – £60

Initial Heat-Up Phase:

• Average power consumption: 1.4-1.5 kW
• Running 10-12 hours per day: £3.50 – £4.50 per day
• Typical heat-up period: 3-7 days depending on starting temperature

Comparison: Heat Pump vs. Gas vs. Electric

To Heat a 45m³ Pool by 10°C:

Heating Method	Energy Cost	CO2 Emissions
SilverLine Fi 90 Heat Pump	£8-15	Low
Gas Boiler	£35-50	High
Direct Electric Heater	£120-150	Medium

💡 The heat pump pays for itself through energy savings, typically within 2-3 seasons compared to traditional heating methods.

🌍 Environmental Benefits

Eco-Friendly R32 Refrigerant

This heat pump uses R32 refrigerant, which has:

• Zero ozone depletion potential (ODP)
• Lower global warming potential (GWP) than older refrigerants like R410A
• Better energy efficiency leading to reduced carbon footprint
• Easier recycling at end of equipment life

Renewable Energy Harnessing

Heat pumps extract free thermal energy from the ambient air. For every 1 kW of electricity used, the system captures an additional 5-12 kW of renewable energy from the environment – making it one of the most sustainable pool heating solutions available.

🔧 What’s Included in the Box

Your complete SilverLine Fi 90 package includes everything needed for installation:

✅ Poolex SilverLine Fi 90 heat pump unit
✅ 2× hydraulic inlet/outlet connectors (50mm diameter)
✅ Wired LCD control panel with 10-meter extension cable
✅ 4× anti-vibration rubber isolating feet
✅ Condensation drainage kit with hose
✅ Winter storage cover (isothermal)
✅ Complete installation and user manual (39 pages)
✅ Warranty documentation
✅ Delivered on protective wooden pallet

Note: Electrical cables, hydraulic piping (PVC), bypass kit, and mounting hardware must be purchased separately according to your specific installation requirements.

📋 Installation Requirements & Placement

Electrical Installation

⚡ Power Supply Required: 230V single-phase, 50Hz
⚡ Circuit Protection: 16A D-curve circuit breaker (dedicated circuit recommended)
⚡ Safety Device: 30mA RCD (residual current device) required
⚡ Cable Specification: RO2V 3×2.5mm² for cable runs up to 10 meters
⚡ Professional Installation: Must be installed by qualified electrician in accordance with local regulations

Hydraulic Connections

💧 Connection Size: 50mm (1½ inch) PVC fittings included
💧 Flow Rate Required: 3-4 m³/hour
💧 Bypass Kit: Highly recommended (not included) for installation flexibility and winterization
💧 Integration Point: Install after filtration but before automated treatment systems (chlorinators, dosing pumps)

Placement & Clearance Requirements

Minimum Space Requirements:

• Front (air outlet): 2.5 meters clear space – no obstructions
• Sides: 50cm clearance each side
• Rear: 50cm clearance
• Above: No overhead restrictions (open sky)

Ideal Placement Guidelines: ✅ Level, stable concrete base or reinforced paving
✅ Outdoors in well-ventilated area
✅ Protected from prevailing winds where possible
✅ Away from bedroom windows (noise consideration)
✅ Not facing neighbor’s property (airflow consideration)
✅ Maximum 10-15 meters from pool (minimize pipe length)
✅ Positioned where condensate drainage is acceptable

Avoid These Locations: ❌ Enclosed spaces or indoor installation
❌ Areas with restricted airflow
❌ Near sources of combustible materials or gases
❌ In direct path of lawn irrigation or sprinklers
❌ Below overhanging structures that restrict air circulation
❌ Areas prone to flooding or standing water

💡 Noise Consideration: While this unit is exceptionally quiet (19-30 dB(A) at 10m), position it away from areas where you spend leisure time when possible. Use Eco Silence mode during evenings for maximum peace.

Optional Enhancement: Anti-Vibration Mounting

For ultimate noise reduction, mount the unit on the included anti-vibration rubber feet or dedicated concrete pads. This minimizes any vibration transmission through the ground.

🛠️ Maintenance & Care

Routine Maintenance (Monthly)

✔ Visual Inspection – Check for any physical damage or debris accumulation
✔ Evaporator Cleaning – Remove leaves, grass clippings, or dust from rear aluminum fins using soft brush or vacuum
✔ Water Filter Check – Clean pool filter to ensure adequate water flow (most common cause of performance issues)
✔ Pressure Gauge Check – Verify refrigerant pressure is within normal range (gauge on unit)
✔ Drainage Check – Ensure condensate is draining freely from condensation outlet

Seasonal Maintenance

Spring Start-Up:

• Remove winter cover
• Inspect hydraulic connections for leaks
• Check electrical connections are secure
• Verify refrigerant pressure
• Test all operating modes

Winter Shutdown (if required):

• Power off unit at circuit breaker
• Close bypass valves and open drain valve
• Remove all water from heat exchanger (critical to prevent freeze damage)
• Replace drain plug
• Install winter storage cover
• If unit remains powered, antifreeze protection will activate automatically at 2°C

Annual Professional Service

⚙ Recommended: Annual inspection by qualified HVAC technician
⚙ Service Includes: Electrical safety check, refrigerant level verification, component inspection, efficiency testing, cleaning of internal components

Water Chemistry Requirements

The titanium heat exchanger is highly resistant to chemical damage, but optimal water chemistry extends equipment life:

Maintain These Parameters:

• pH Level: 6.9 – 8.0 (ideal: 7.2-7.6)
• Chlorine: Follow pool manufacturer guidelines
• Salt Levels: Compatible with salt chlorination systems
• Water Hardness: Keep calcium hardness within recommended range

⚠️ Important: Install chemical dosing systems (chlorinators, pH controllers) downstream of the heat pump in your hydraulic circuit. This prevents concentrated chemicals from entering the heat exchanger.

❓ Frequently Asked Questions

General Operation

Q: How quickly will this heat pump heat my pool?
A: Under typical conditions, expect approximately 1-1.5°C temperature increase per day for a 45m³ pool. Initial heat-up from cold water may take 3-7 days to reach comfortable swimming temperature. Using a pool cover dramatically reduces this time by preventing heat loss.

Q: Can I use this heat pump with a salt chlorination system?
A: Absolutely! The titanium Twisted Tech© heat exchanger is specifically designed to resist salt corrosion. This unit is fully compatible with all salt chlorination systems. Just ensure your salt chlorinator is installed after the heat pump in the water circuit.

Q: Does this unit heat and cool?
A: Yes! The SilverLine Fi 90 provides both heating and cooling functions. In hot climates, you can cool your pool water down to 8°C. This is particularly useful for lap pools or in regions where summer water temperatures become uncomfortably warm.

Q: How loud is this heat pump in operation?
A: This is one of the quietest pool heat pumps available. At 10 meters distance, it operates at just 19-30 dB(A) in inverter mode – comparable to rustling leaves or a whisper. The Eco Silence mode reduces noise even further, making it ideal for nighttime operation without disturbing neighbors.

Q: Will this work in cold weather?
A: Yes! The unit operates down to -7°C ambient temperature and includes an automatic defrost cycle. However, efficiency decreases in colder conditions (COP drops from 13.9 at 26°C to 4.4 at 15°C). Performance is best in temperatures above 10°C.

Installation & Setup

Q: Can I install this heat pump myself?
A: Hydraulic connections can potentially be completed by a confident DIYer with PVC plumbing experience, but electrical installation must be performed by a qualified electrician to comply with safety regulations and maintain warranty validity. Refrigerant work requires specialist certification.

Q: Do I need a bypass kit?
A: While not absolutely required, a bypass kit is highly recommended. It allows you to regulate water flow through the heat pump, isolate the unit for maintenance without shutting down your entire pool system, and makes winterization much easier.

Q: How far can the heat pump be from my pool?
A: Maximum recommended distance is 10-15 meters to minimize heat loss through pipes and maintain good water flow rates. Shorter distances are better for efficiency. The wired control panel has a 10-meter extension cable included, giving you flexibility.

Q: What size electrical supply do I need?
A: This unit requires a 230V single-phase supply with a dedicated 16A D-curve circuit breaker. Your electrician will need to install RO2V 3×2.5mm² cable (for runs up to 10m) protected by a 30mA RCD. Maximum current draw is 8.5A.

Q: Can this be installed for an above-ground pool?
A: Absolutely! The SilverLine Fi 90 works excellently with above-ground pools in the 40-50m³ range. Position the unit at ground level (no elevation needed). A bypass kit is particularly important for above-ground installations to manage water flow properly.

WiFi & Controls

Q: How does the WiFi control work?
A: The built-in WiFi connects to your home 2.4GHz WiFi network and integrates with the free Smart Life app (iOS/Android). You can control all functions remotely: set temperature, switch modes, create schedules, and monitor operation from anywhere with internet access. Compatible with Alexa and Google Home.

Q: Do I need WiFi for the heat pump to work?
A: No. The unit works perfectly with the included wired LCD control panel without any WiFi connection. WiFi is an optional convenience feature for remote control and monitoring.

Q: What if my WiFi is 5GHz only?
A: The unit requires a 2.4GHz WiFi network. Most modern routers support both frequencies – check your router settings to enable a 2.4GHz network, or set up a “guest network” on 2.4GHz specifically for IoT devices.

Running Costs & Efficiency

Q: What are typical running costs?
A: Daily running costs vary by usage pattern and electricity rates. For maintaining temperature, expect approximately £1-2 per day (based on £0.25/kWh rate) running 6-8 hours. Monthly running costs typically range from £30-60 during active swimming season. This is 70-90% cheaper than gas or electric heating.

Q: What does COP mean and why does it matter?
A: COP (Coefficient of Performance) is the ratio of heating power output to electrical power input. A COP of 13.9 means you get 13.9 kW of heating for every 1 kW of electricity consumed. Higher COP = lower running costs. This unit’s exceptional COP makes it extremely economical to operate.

Q: How much does it cost to heat my pool from cold?
A: Initial heat-up costs more than maintenance. To raise a 45m³ pool by 10°C might cost £15-25 over 4-5 days. After reaching target temperature, daily costs drop significantly as the unit only needs to replace minor heat losses.

Maintenance & Troubleshooting

Q: How often does it need servicing?
A: Monthly: Clean debris from evaporator fins, check filter, verify water flow. Annually: Professional service recommended to check refrigerant, electrical connections, and overall system health. The unit is designed for low maintenance with no user-serviceable refrigerant components.

Q: What happens if there’s a power cut?
A: The heat pump will stop operating during a power outage. When power is restored, the unit remembers your previous settings and resumes normal operation automatically. Your pool temperature will gradually drop during the outage depending on ambient conditions and whether a cover is used.

Q: Do I need to winterize it?
A: If remaining powered: The built-in antifreeze protection automatically activates at 2°C to prevent freeze damage. If shutting down for winter: You must drain all water from the heat exchanger using the drain plug and valves, then install the included winter cover. Failure to drain can cause catastrophic freeze damage (not covered by warranty).

Q: What warranty is included?
A: Complete warranty coverage includes:
2 years – Full unit warranty
5 years – Compressor warranty
15 years – Titanium heat exchanger against chemical corrosion (excludes freeze damage)

Q: What if I get an error code?
A: The LCD display shows diagnostic error codes. The comprehensive manual includes a full troubleshooting section with all error codes and solutions. Common issues like flow errors (code 03) are often resolved by checking water pump operation and bypass valve settings.

🏆 Why Buy From Parts4Tubs?

✅ Authorized Poolex Dealer – Full manufacturer warranty support
✅ Expert Technical Support – We understand pool heating inside and out
✅ Fast UK Delivery – Supplied on protective wooden pallet
✅ Complete Documentation – All manuals and technical data provided
✅ Installation Guidance – Support available for installation questions

📦 Technical Summary

Perfect for: In-ground and above-ground pools, 40-50m³ capacity
Power: 9.2 kW max heating output | 6.4 kW at 15°C ambient
Efficiency: COP up to 13.9 – industry-leading performance
Operating Range: -7°C to +43°C ambient temperature
Refrigerant: Eco-friendly R32
Heat Exchanger: Titanium Twisted Tech© (15-year corrosion warranty)
Compressor: GMCC Toshiba technology (5-year warranty)
Control: LCD wired controller + WiFi Smart Life app
Noise: 19-30 dB(A) at 10m (ultra-quiet)
Connections: 50mm PVC hydraulic fittings
Power Supply: 230V single-phase, 16A protection
Dimensions: 907 × 334 × 656 mm
Weight: 37.5 kg

🎁 What Makes This Investment Worthwhile

Immediate Benefits:

• Extend your swimming season by months
• Consistent, comfortable water temperature
• Whisper-quiet operation won’t disturb outdoor living
• Remote control from your smartphone

Long-Term Value:

• Up to 70% lower running costs vs. gas heating
• Exceptional 15-year heat exchanger warranty
• Full Inverter technology maximizes equipment lifespan
• Eco-friendly operation reduces carbon footprint
• Increases property value (heated pools are highly desirable)

Peace of Mind:

• Comprehensive 2-year warranty (5-year compressor)
• Built by Poolex/Poolstar – established European manufacturer
• Anti-corrosion titanium construction
• Automatic antifreeze protection
• Low maintenance requirements

🛒 Ready to Transform Your Pool Experience?

The Poolex SilverLine Fi 90 represents exceptional value – combining cutting-edge Full Inverter technology, premium components, and smart WiFi control at an accessible price point. With COP ratings up to 13.9, this is one of the most efficient pool heating solutions available today.

Start enjoying perfect pool temperatures throughout the extended swimming season while keeping your energy bills low.