🌊 Norsup SG Silent-Pro 28 | 28kW Inverter Swimming Pool Heat Pump with WiFi Control & Ultra-Silent Operation

Transform your swimming experience with whisper-quiet, energy-efficient pool heating that works even in freezing conditions.

The Norsup SG Silent-Pro 28 represents the pinnacle of modern pool heating technology. This premium 28kW full-inverter heat pump combines exceptional heating power with ultra-silent operation (from just 19dB), intelligent WiFi control, and remarkable efficiency that operates down to -15°C. Purpose-built for large residential pools (70-115m³), it delivers professional-grade performance with residential-friendly noise levels and running costs.

Whether you’re extending your swimming season into autumn or maintaining perfect temperatures year-round, the Silent-Pro 28 offers the perfect balance of power, efficiency, and smart features.

💡 Why Choose the Norsup SG Silent-Pro 28?

🔇 Whisper-Quiet Operation

At just 19-23 dB(A) at 10 meters, this is one of the quietest pool heat pumps available. Thanks to its double-sided airflow design and advanced inverter technology, you’ll barely notice it running – perfect for residential areas with noise-sensitive neighbors.

⚡ Exceptional Energy Efficiency

With a Coefficient of Performance (COP) up to 16.0, the Silent-Pro 28 delivers up to £16 worth of heating for every £1 of electricity consumed. Full inverter technology continuously adjusts power output to maintain temperature efficiently, slashing running costs compared to traditional heaters.

📱 Smart WiFi Control

Control your pool temperature from anywhere using the included NorsupOne smartphone app. Set schedules, adjust temperatures, monitor performance, and receive alerts – all from your mobile device. Works with both iOS and Android.

🌡️ All-Season Performance

Unlike cheaper heat pumps that struggle in cooler weather, the Silent-Pro 28 operates effectively down to -15°C ambient temperature. Advanced defrost cycles and optimized refrigerant flow ensure consistent heating even on cold days.

🛡️ Built for Longevity

Premium construction includes a titanium twisted heat exchanger (highly resistant to salt and chlorine), robust aluminum cabinet with black powder-coat finish, and Panasonic DC inverter compressor. Backed by a 5-year warranty on the unit and 10 years on compressor & heat exchanger.

🌿 Environmentally Responsible

Uses R32 refrigerant with 3x lower Global Warming Potential (GWP) than older R410A gas. Energy Label A rated for efficiency, helping reduce your carbon footprint while saving money.

📊 Technical Specifications

Specification	Details
Model	SG Silent-Pro 28 (SP28)
Part Number	7036144
Heating Capacity	27.6 kW (max) at A27/W27<br>18.2 kW (max) at A15/W25
Power Input	4.6 kW (max)
Recommended Pool Volume	70-115 m³
COP (Efficiency)	Up to 16.0 at A27/W27<br>6.5 at A15/W25
Operating Range	Air: -15°C to +43°C<br>Water: 9°C to 40°C
Noise Level	43-53 dB(A) at 1m<br>23-33 dB(A) at 10m
Power Supply	220-240V / 1 Phase / 50Hz
Rated Current	23A
Minimum Fuse	50A
Energy Label	A
Refrigerant	R32 (1.4 kg)
Compressor	Panasonic DC Inverter (rotary)
Heat Exchanger	Titanium twisted tube in PVC
Fan	1x DC variable speed (horizontal)
Fan Speed	500-800 rpm
Water Connection	50mm
Water Flow Rate	7.8 m³/h (nominal)
WiFi Module	Included
Controller	Full-color touchscreen included
Operating Modes	Power / Smart / Silent
Defrost	Automatic
SmartGrid	Yes (external control input)
Dimensions (L×W×H)	1210 × 530 × 900 mm
Net Weight	See nameplate
Warranty	5 years (heat pump)<br>10 years (compressor & heat exchanger)
Winter Cover	Included

📥 Downloads & Documentation

📄 Installation & Operating Manual (opens in new tab)

Complete guide covering installation procedures, electrical wiring diagrams, plumbing connections, initial startup, operation instructions, maintenance schedules, troubleshooting, and safety information. Available in English, German, French, Dutch, Danish, and Swedish. Essential reading for installers and owners.

📄 WiFi Controller Manual (opens in new tab)

Step-by-step instructions for WiFi module setup, NorsupOne app installation (iOS/Android), network configuration, device pairing, touchscreen controller operation, timer programming, mode selection, and mobile control features. Includes QR codes for easy app download.

📄 Technical Datasheet (opens in new tab)

Detailed technical specifications for the complete Silent-Pro range including performance data at various ambient temperatures, COP values, electrical requirements, dimensions, and pool volume recommendations. Perfect for technical comparison and system design.

🏊 Pool Sizing Guide – Is This Heat Pump Right For Your Pool?

The Norsup SG Silent-Pro 28 is specifically designed for large residential swimming pools with volumes between 70-115 m³ (cubic meters).

How to Calculate Your Pool Volume:

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

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

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

Quick Reference Pool Sizes:

Pool Dimensions	Approximate Volume	Suitable?
8m × 4m × 1.5m (Rectangular)	48 m³	⚠️ Consider SP20
10m × 5m × 1.5m (Rectangular)	75 m³	✅ Perfect fit
12m × 6m × 1.5m (Rectangular)	108 m³	✅ Ideal
14m × 7m × 1.5m (Rectangular)	147 m³	⚠️ Consider SP35T
9m diameter × 1.5m (Round)	95 m³	✅ Excellent

⚠️ Important: These calculations assume a properly insulated pool (covered when not in use). Uninsulated or uncovered pools may require a larger capacity unit.

⏱️ Estimated Heat-Up Times

Understanding how quickly your pool will heat helps you plan your swimming schedule and manage expectations. The tables below show estimated heat-up times for the Norsup SG Silent-Pro 28 under various conditions.

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

Heat-Up Time Estimates at 15°C Ambient Temperature

Based on 18.2 kW heating capacity (A15/W25)

Pool Volume	10°C Rise (18→28°C)	15°C Rise (13→28°C)	20°C Rise (8→28°C)
70 m³	44.7 hours (1.9 days)	67.0 hours (2.8 days)	89.4 hours (3.7 days)
80 m³	51.1 hours (2.1 days)	76.6 hours (3.2 days)	102.1 hours (4.3 days)
90 m³	57.5 hours (2.4 days)	86.2 hours (3.6 days)	114.9 hours (4.8 days)
100 m³	63.8 hours (2.7 days)	95.7 hours (4.0 days)	127.7 hours (5.3 days)
110 m³	70.2 hours (2.9 days)	105.3 hours (4.4 days)	140.4 hours (5.9 days)

Heat-Up Time Estimates at 27°C Ambient Temperature

Based on 27.6 kW heating capacity (A27/W27) – warm weather conditions

Pool Volume	5°C Rise (23→28°C)	10°C Rise (18→28°C)	15°C Rise (13→28°C)
70 m³	14.8 hours	29.5 hours (1.2 days)	44.3 hours (1.8 days)
80 m³	16.9 hours	33.7 hours (1.4 days)	50.6 hours (2.1 days)
90 m³	19.0 hours	37.9 hours (1.6 days)	56.9 hours (2.4 days)
100 m³	21.0 hours	42.1 hours (1.8 days)	63.2 hours (2.6 days)
110 m³	23.2 hours	46.3 hours (1.9 days)	69.5 hours (2.9 days)

⚠️ Important Disclaimers:

• These are theoretical estimates based on standard formulas
• Actual times vary based on: pool insulation quality, whether covered, ambient temperature, wind exposure, starting water temperature, and solar gain
• Covered pools heat significantly faster (30-50% reduction in time)
• Colder ambient temperatures increase heat-up times
• For fastest results: use a solar pool cover when pump is off

💰 Running Cost Comparison

One of the biggest advantages of heat pump technology is the dramatic cost savings compared to traditional heating methods.

Annual Running Cost Estimates (6-month season, maintaining 28°C)

Based on UK average electricity price of £0.24/kWh (2024)

Heating Method	Energy Used	Estimated Annual Cost	Savings vs Heat Pump
Silent-Pro 28 Heat Pump	~4,500 kWh	£1,080	Baseline
Electric Heater (3kW)	~27,000 kWh	£6,480	Save £5,400/year
Gas Boiler	~6,500 kWh equivalent	£2,600	Save £1,520/year
Oil Boiler	~7,000 kWh equivalent	£3,150	Save £2,070/year

💡 Payback Period: With typical installation costs, most customers recoup their investment through energy savings in 3-4 years, then enjoy continued savings for the 15+ year lifespan of the unit.

Why Heat Pumps Save Money: The Silent-Pro 28’s COP of 6.5 (at 15°C ambient) means for every 1 kW of electricity consumed, it delivers 6.5 kW of heating – that’s 550% efficiency. This is achieved by extracting free thermal energy from the air.

🎛️ Operating Modes Explained

The Silent-Pro 28 offers three intelligent operating modes to suit different scenarios:

⚡ Power Mode

• Maximum heating output for rapid temperature rise
• Best for: Initial pool heat-up or recovering from cold periods
• Noise level: Moderate (up to 53 dB(A) at 1m)
• Energy use: Higher consumption for faster results

🧠 Smart Mode (Recommended)

• Intelligent automatic adjustment based on temperature differential
• Best for: Everyday use and temperature maintenance
• Noise level: Variable (adjusts as needed)
• Energy use: Optimized balance of speed and efficiency

🔇 Silent Mode

• Ultra-quiet operation prioritizing minimal noise
• Best for: Nighttime operation or noise-sensitive locations
• Noise level: Whisper-quiet (from 19 dB(A) at 10m)
• Energy use: Slightly slower but very efficient

💡 Pro Tip: Use Power Mode for initial heat-up, then switch to Smart Mode for daily operation. Enable Silent Mode during evening/night hours via the timer function.

🎯 Key Features & Benefits

Full Inverter Technology

✅ Benefit: Continuously variable compressor speed adjusts output precisely to demand, eliminating the wasteful on/off cycling of traditional heat pumps. This delivers smoother temperature control, longer equipment life, and up to 30% energy savings.

Double-Sided Airflow Design

✅ Benefit: Air is drawn in and expelled horizontally from both sides of the unit, significantly reducing noise levels while improving heat transfer efficiency. This is the secret behind the Silent-Pro’s whisper-quiet operation.

SmartGrid Ready

✅ Benefit: External control input allows integration with smart home systems, solar PV optimizers, or economy tariff controllers. Automatically run the heat pump when electricity is cheapest or when solar production is highest.

Titanium Twisted Heat Exchanger

✅ Benefit: The twisted tube design increases surface area for superior heat transfer, while titanium construction ensures decades of corrosion-free operation even with salt water or high chlorine levels. This is a professional-grade component found in commercial installations.

Soft Start Function

✅ Benefit: Gradual power ramp-up on startup prevents voltage spikes that can trip breakers or damage electrical components. Protects both the heat pump and your home’s electrical system.

Automatic Defrost

✅ Benefit: Intelligent sensors detect ice formation on the coil and automatically activate defrost cycles, ensuring consistent performance even in freezing conditions. No manual intervention required.

Winter Cover Included

✅ Benefit: Protective cover shields the unit from harsh winter weather during off-season storage, extending equipment life and maintaining appearance.

Integrated WiFi Module

✅ Benefit: No additional purchase required – WiFi control is built-in from day one. Connect to your home network and start controlling your pool temperature from anywhere via the NorsupOne app.

Full-Color Touchscreen Controller

✅ Benefit: Large, intuitive touchscreen interface (can be wall-mounted) makes operation simple for all family members. Clear display shows current temperatures, operating mode, and system status at a glance.

🔧 Installation Requirements

Electrical Supply

• Required: 220-240V / 1 Phase / 50Hz supply
• Circuit breaker: 50A minimum
• Residual Current Device (RCD): 30mA maximum
• Cable size: 10mm² minimum (consult electrician for cable runs >15m)
• ⚠️ Important: Installation must be performed by a qualified electrician in accordance with local electrical codes

Plumbing Connections

• Water connections: 50mm diameter (slip-fit PVC)
• Water flow rate: 7.8 m³/h nominal
• Positioning: Install AFTER pool filter and pump, BEFORE chemical dosing systems or sanitizers
• Bypass valve: Recommended for service access

Physical Placement

• Clearances required:
  • Front (air inlet): 500mm minimum
  • Sides: 300mm minimum
  • Rear (air outlet): 700mm minimum
  • Top: 1500mm minimum (avoid overhead obstructions)
• Surface: Level, solid concrete base or mounting pad
• Location: Outdoor installation recommended (consult supplier for indoor installations)
• Avoid: Enclosed spaces with limited airflow, direct exposure to sprinkler systems, areas where discharge air recirculates

Condensate Drainage

The unit produces condensate water (several liters per hour in humid conditions). Ensure the 20mm drain outlet can route to a suitable drain or soakaway.

❓ Frequently Asked Questions

1. How much does it cost to run the Silent-Pro 28 per month?

Running costs depend on your local electricity rates, pool size, desired temperature, and ambient conditions. As a rough guide, expect £150-£250 per month during active swimming season (May-September in UK), dropping to minimal costs if you lower the temperature or turn it off in winter. This assumes UK average electricity price of £0.24/kWh.

For comparison, a traditional electric heater would cost £900-£1,300 per month for the same heating load – the heat pump saves approximately £750-£1,050 monthly.

2. Can I heat my pool in winter with this heat pump?

Yes, the Silent-Pro 28 operates down to -15°C ambient temperature, making it suitable for winter use in most UK climates. However, heating efficiency decreases in colder weather (lower COP), so running costs will be higher. Many customers use a winter pool cover to minimize heat loss and reduce costs.

For year-round swimming, consider:

• Investing in a high-quality thermal pool cover
• Maintaining a lower winter temperature (24-26°C instead of 28-30°C)
• Combining the heat pump with solar thermal panels to reduce costs

3. How loud is the Silent-Pro 28 in real-world conditions?

At 10 meters distance, the Silent-Pro 28 produces 23-33 dB(A) depending on mode, which is comparable to a whisper or quiet library. In Silent Mode, it drops to approximately 19-23 dB(A), making it nearly inaudible at typical neighbor distances (15-20m+).

Real-world comparisons:

• Quiet library: 30 dB(A)
• Whisper: 20 dB(A)
• Modern refrigerator: 40 dB(A)
• Normal conversation: 60 dB(A)

Most customers report that they cannot hear the unit when sitting by their pool, and neighbors are rarely aware it’s running.

4. Do I need planning permission to install this heat pump?

In most UK residential installations, pool heat pumps are considered permitted development and don’t require planning permission, provided they meet certain criteria:

✅ Generally permitted:

• Installed on ground level
• More than 1 meter from property boundary
• Noise output <42 dB(A) at 1 meter from nearest neighbor’s window (Silent-Pro 28 qualifies in Silent/Smart mode)

⚠️ May require permission:

• Listed buildings
• Conservation areas
• Properties with restrictive covenants
• Installation on roofs or walls

Always check with your local planning authority before installation, especially if you live in a conservation area or listed building.

5. How long will the Silent-Pro 28 last?

With proper maintenance, expect 15-20 years of service life. Key durability features include:

• Titanium heat exchanger: Virtually corrosion-proof (10-year warranty)
• Panasonic compressor: Commercial-grade reliability (10-year warranty)
• Aluminum cabinet: Powder-coated for long-lasting protection
• DC inverter technology: Fewer mechanical stresses than on/off systems

Maintenance requirements:

• Clean air filter every 2-3 months (5-minute job)
• Annual professional service (check refrigerant, electrical connections, clean coils)
• Winterize properly if shutting down in cold months
• Keep area around unit clear of debris

Many Norsup heat pumps in commercial installations exceed 20 years of operation with proper care.

6. Can I control the heat pump when I’m away from home?

Absolutely! The integrated WiFi module and NorsupOne app allow full control from anywhere with internet access. You can:

📱 Adjust target temperature 📱 Change operating modes (Power/Smart/Silent) 📱 Set timer schedules for automatic operation 📱 Monitor current water temperature 📱 Receive fault alerts 📱 View operating status and energy usage

Perfect for:

• Pre-heating the pool before returning from work or holiday
• Turning off the heat pump if weather turns bad
• Troubleshooting issues remotely
• Monitoring energy consumption

The app is available for both iOS (App Store) and Android (Google Play) devices.

7. What’s the difference between the SP28 (1-phase) and SP28T (3-phase)?

Both models have nearly identical specifications and performance. The difference is the electrical supply type:

SP28 (Part 7036144) – Single Phase:

• Power supply: 220-240V / 1 Phase
• Best for: Standard residential installations (most UK homes)
• Circuit breaker: 50A
• Rated current: 23A

SP28T (Part 7036145) – Three Phase:

• Power supply: 380V / 3 Phase
• Best for: Commercial properties or homes with 3-phase supply
• Circuit breaker: 25A
• Rated current: 9A

💡 If you’re unsure which supply you have: Check your main fuse box. Most UK residential properties have single-phase supply. Three-phase is typically only found in commercial premises or very large rural properties.

8. How does the SmartGrid function work?

The SmartGrid feature allows external devices to send control signals to the heat pump, optimizing operation based on electricity pricing or renewable energy availability.

Common uses:

☀️ Solar PV Integration: Connect a solar optimizer that tells the heat pump to run at maximum power when your solar panels are generating excess electricity. This essentially gives you “free” pool heating during sunny days.

💰 Economy Tariff Optimization: Link to a smart controller that shifts heat pump operation to “off-peak” hours when electricity is cheapest (e.g., overnight Economy 7 tariffs).

🏠 Smart Home Integration: Connect to home automation systems (via external relay) for advanced scheduling based on weather forecasts, occupancy sensors, or other smart home triggers.

⚠️ Note: SmartGrid requires external control devices (not included). Consult with a smart home specialist or solar installer for implementation.

9. What maintenance does the heat pump require?

The Silent-Pro 28 is designed for low-maintenance operation, but regular care ensures optimal performance:

Monthly (DIY):

• Visual inspection: Check for debris around the unit
• Air filter cleaning: Rinse with water if dusty (takes 5 minutes)

Every 3 Months (DIY):

• Coil inspection: Check the outdoor coil for dirt, leaves, or blockages
• Water flow check: Ensure pool water is circulating correctly

Annually (Professional Service Recommended):

• Refrigerant pressure check
• Electrical connection inspection
• Deep clean of heat exchanger coils
• Fan motor lubrication (if required)
• Control system diagnostics
• Performance testing

Before Winter Shutdown (if applicable):

• Drain water from heat exchanger to prevent freeze damage
• Disconnect power supply
• Install protective winter cover (included)
• Document final settings for easy restart in spring

Cost: Annual professional service typically costs £150-£250, which is a small investment to protect your £4,000-£5,000 heat pump.

10. Is the R32 refrigerant safe and environmentally friendly?

Yes, R32 is a modern, environmentally superior refrigerant that’s becoming the industry standard:

🌿 Environmental Benefits:

• 3x lower Global Warming Potential (GWP) than older R410A refrigerant
• Zero Ozone Depletion Potential (ODP)
• Higher efficiency means less electricity consumption
• EU F-Gas Regulation compliant

✅ Safety:

• R32 is classified as “A2L” (mildly flammable, low toxicity)
• Refrigerant is fully sealed inside the heat pump (no exposure during normal operation)
• Only qualified technicians should work on refrigerant circuits
• Built-in safety features prevent leaks and pressure issues

R32 is used in millions of air conditioning and heat pump systems worldwide and has an excellent safety record when handled correctly by certified engineers.

11. Can I install this myself to save money?

Electrical and refrigerant work: NO – This must be performed by qualified professionals:

• Electrical installation: Requires a qualified electrician (Part P certification in UK)
• Refrigerant handling: Requires F-Gas certification
• Warranty requirement: Professional installation is typically required for warranty validity

What you CAN do:

• Prepare the installation site (concrete base, clearances)
• Run electrical conduit (electrician completes connections)
• Pre-plumb PVC pipe (plumber completes final connections)
• Install the winter cover and perform routine cleaning

💡 Recommendation: Get quotes from multiple MCS-certified installers. Professional installation typically costs £500-£1,200 depending on complexity and typically includes:

• Electrical connection and testing
• Plumbing integration with bypass valves
• System startup and commissioning
• Customer training
• Warranty registration

The peace of mind and warranty protection are worth the investment.

12. What size pool pump do I need to use with this heat pump?

The Silent-Pro 28 requires a water flow rate of 7.8 m³/h (nominal), which most modern pool filtration pumps easily provide.

Minimum pump requirements:

• Flow rate: 6.5-9.0 m³/h (within operating range)
• Head pressure: Sufficient to overcome filter, pipework, and heat pump resistance
• Runtime: Should run during all heat pump operation periods

⚠️ Important: The heat pump includes a flow switch that prevents operation if water flow is insufficient. This protects the heat exchanger from freeze damage.

💡 Tip: Your pool pump should run during all heating periods. For fastest heating, run the pump 24/7 during initial heat-up, then reduce to 8-12 hours daily for temperature maintenance.

Independent wiring recommended: Wire your heat pump and pool filtration pump independently. This prevents your filtration from stopping when target temperature is reached (heat pump turns off but filtration should continue).

🛡️ Warranty & Support

Manufacturer’s Warranty

🔧 5-Year Parts & Labor Warranty (Heat pump unit)

• Covers all manufacturing defects and component failures
• Includes labor costs for warranty repairs
• Valid from date of purchase with proof of professional installation

⭐ 10-Year Extended Warranty (Compressor & Heat Exchanger)

• Covers the two most expensive components
• Reflects manufacturer confidence in durability
• Parts-only coverage (labor charges may apply after year 5)

Warranty Conditions: ✅ Professional installation by qualified engineer ✅ Annual servicing performed (records maintained) ✅ Unit operated within specified parameters ✅ Not used for commercial purposes (residential use only) ✅ Warranty registration completed within 30 days of installation

⚠️ Warranty does NOT cover:

• Damage from improper installation
• Lack of maintenance
• Operation outside specified parameters
• Chemical damage (incorrect pool chemistry)
• Physical damage or vandalism
• Frost damage due to improper winterization

Technical Support

📱 NorsupOne App

• Built-in troubleshooting guides
• Fault code lookup
• Performance monitoring
• Service reminder notifications

📞 Need Help Choosing?

Still unsure if the Silent-Pro 28 is right for your pool? Our team is here to help!

Contact us for:

• 📐 Pool volume calculations and heat pump sizing
• 💰 Running cost estimates for your specific situation
• ⚡ Electrical installation advice
• 👷 Installer recommendations in your area
• 🌡️ Heat-up time estimates for your climate

Our Promise: We’d rather you buy the right heat pump than the wrong one. We’ll honestly tell you if a smaller or larger model would better suit your needs.

✅ What’s Included in the Box

When your Silent-Pro 28 arrives, here’s what you’ll find:

📦 Main Unit:

• ✅ Norsup SG Silent-Pro 28 heat pump (fully assembled)
• ✅ WiFi module (pre-installed and configured)
• ✅ Full-color touchscreen controller (with 5m cable)
• ✅ Winter protective cover
• ✅ User manual (multi-language)
• ✅ Installation manual (with wiring diagrams)
• ✅ Warranty registration card

⚠️ Not Included (Required for Installation):

• ❌ Electrical supply cable and circuit breaker
• ❌ PVC plumbing fittings (50mm)
• ❌ Bypass valves (recommended)
• ❌ Mounting pad or concrete base
• ❌ Condensate drain hose
• ❌ Installation labor

🎁 Special Features That Make a Difference

Adaptive Inverter Control

The Silent-Pro 28 continuously monitors water temperature and ambient conditions, automatically adjusting compressor speed to deliver exactly the heating required. This eliminates temperature overshoot, reduces wear on components, and minimizes energy waste.

Intelligent Defrost

Advanced algorithms detect frost accumulation on the outdoor coil and trigger defrost cycles only when needed (not on a fixed timer like cheaper units). This maximizes heating time and minimizes wasted energy on unnecessary defrost cycles.

Low Ambient Performance

While many heat pumps struggle below 10°C, the Silent-Pro 28 maintains strong performance down to -15°C thanks to enhanced vapor injection technology and optimized refrigerant flow. This makes it ideal for UK spring and autumn use when ambient temperatures are low but you still want to swim.

WiFi with Cloud Backup

All your settings and schedules are backed up to Norsup’s cloud servers, so even if you change phones or need to reset the WiFi module, your configuration is preserved and easily restored.

Multi-User Access

Share control of your heat pump with family members – the NorsupOne app supports multiple user accounts with different permission levels (admin vs. guest access).

📊 Performance Data – COP Values Explained

COP (Coefficient of Performance) tells you how many units of heat you get for each unit of electricity consumed. Higher COP = more efficient = lower running costs.

Silent-Pro 28 COP Performance:

Ambient Temp	COP	What This Means
27°C (warm)	16.0	£1 electricity = £16 worth of heating
15°C (mild)	6.5	£1 electricity = £6.50 worth of heating
10°C (cool)	5.4	£1 electricity = £5.40 worth of heating
5°C (cold)	4.4	£1 electricity = £4.40 worth of heating
0°C (freezing)	3.9	£1 electricity = £3.90 worth of heating
-5°C (very cold)	3.6	£1 electricity = £3.60 worth of heating

Why COP matters: Even at 0°C ambient (freezing point), the Silent-Pro 28 still delivers 390% efficiency – nearly 4 times more efficient than an electric heater (which has a COP of 1.0). This is why heat pumps are dramatically cheaper to run than traditional heating methods.

🏗️ Installation Best Practices

For optimal performance, longevity, and quiet operation:

Location Selection

✅ DO:

• Install on a level, solid concrete pad or anti-vibration mounting feet
• Position to maximize distance from bedroom windows (especially neighbors’)
• Ensure unrestricted airflow on all sides
• Locate close to pool equipment area (minimize pipework runs)
• Position condensate drain to discharge into soakaway or drain

❌ DON’T:

• Install in enclosed spaces or alcoves (recirculating air reduces efficiency)
• Place directly under windows or outdoor living areas
• Position where discharge air blows toward seating areas
• Install in flower beds (roots can damage pad/piping)
• Block access panels (needed for service)

Pipework Recommendations

• Use 50mm PVC pipe throughout (don’t reduce pipe size)
• Install bypass valve (allows isolation for service without draining pool)
• Insulate outdoor pipe runs (reduces heat loss in cool weather)
• Install drain points at low spots (for winterization)
• Use flexible connectors (absorbs vibration, prevents stress on connections)

Electrical Best Practices

• Dedicated circuit (don’t share with other equipment)
• Correct cable sizing (10mm² minimum for typical runs)
• RCD protection (30mA maximum)
• Weatherproof isolation switch within sight of unit
• Proper earthing/bonding (essential for safety and warranty)

🌍 Environmental Impact

Choosing the Norsup SG Silent-Pro 28 is an environmentally responsible decision:

🌱 Carbon Footprint Reduction: Compared to a gas boiler heating the same pool, the Silent-Pro 28 reduces CO₂ emissions by approximately 60-70% (depending on electricity generation source). If powered by renewable energy (solar, wind), the reduction approaches 90-95%.

♻️ Renewable Energy Compatibility: The heat pump’s SmartGrid function makes it ideal for pairing with solar PV systems. Run the heat pump during peak solar production hours (midday), and you’re essentially heating your pool with free, renewable energy.

💧 Reduced Water Waste: Efficient heating means your pool reaches comfortable temperatures faster, reducing the temptation to drain and refill with warmer water – saving thousands of liters.

🔋 Grid-Friendly: The inverter technology provides smooth, gradual power draw (no sudden spikes), which is better for grid stability than on/off equipment.

🏆 Why Buy from Us?

✅ Authorized Norsup Dealer – Official UK distributor, full warranty support

✅ Expert Advice – Decades of experience in pool heating solutions

✅ Competitive Pricing – Best value without compromising on service

✅ Fast Delivery – Most orders dispatched within 3-5 working days

✅ Genuine Products – All units sourced directly from Norsup, never grey imports

✅ Installer Network – We can recommend MCS-certified installers in your area

✅ After-Sales Support – UK-based technical support team available

🎯 Perfect For:

This heat pump is ideally suited for:

• ✅ Large residential swimming pools (70-115m³)
• ✅ All-season pool heating (spring through autumn, or year-round with cover)
• ✅ Noise-sensitive locations (residential areas with close neighbors)
• ✅ Energy-conscious pool owners (want to minimize running costs)
• ✅ Smart home enthusiasts (WiFi control and scheduling)
• ✅ Coastal installations (titanium heat exchanger resists salt corrosion)
• ✅ Eco-friendly households (pairs perfectly with solar PV)

🚫 Not Recommended For:

This heat pump may NOT be the best choice if:

• ❌ Smaller pools (<60m³) – Consider the SP17 or SP20 instead
• ❌ Very large pools (>120m³) – Consider the SP35T for faster heating
• ❌ Indoor installations without proper ventilation – Consult specialist
• ❌ Extremely cold climates with extended periods below -15°C – Supplement with solar thermal
• ❌ Uninsulated/uncovered pools in cold climates – Cover is essential for efficiency

🛠️ Troubleshooting Common Issues

Problem: Heat pump won’t start

• ✅ Check power supply and circuit breaker
• ✅ Verify water is flowing (pool pump must run first)
• ✅ Check flow switch operation
• ✅ Wait 3 minutes (built-in restart delay)

Problem: Not heating effectively

• ✅ Check target temperature setting
• ✅ Verify pool cover is being used when pump is off
• ✅ Check for air blockages around unit
• ✅ Clean air filter
• ✅ Verify water flow rate is adequate

Problem: Unit is noisy

• ✅ Switch to Silent Mode
• ✅ Check mounting pad is level and stable
• ✅ Verify unit isn’t touching walls or structures
• ✅ Check for debris in fan

Problem: Frequent defrost cycles

• ✅ Normal in humid, cold conditions (<10°C with high humidity)
• ✅ Ensure airflow is unrestricted
• ✅ Check coil isn’t dirty/blocked

For persistent problems: Consult the user manual’s detailed troubleshooting section or contact Norsup technical support. The WiFi controller displays error codes that help diagnose issues remotely.

💎 In Summary: The Silent-Pro 28 Advantage

The Norsup SG Silent-Pro 28 represents the pinnacle of residential pool heat pump technology, combining:

🔇 Whisper-quiet operation that won’t disturb you or your neighbors ⚡ Exceptional efficiency (COP up to 16.0) slashing running costs 📱 Smart WiFi control for convenience and optimization ❄️ All-season capability operating down to -15°C 🛡️ Premium construction with titanium and aluminum for decades of service 🌿 Environmental responsibility with R32 refrigerant and high efficiency ⚙️ Intelligent features like SmartGrid, auto-defrost, and adaptive inverter control

Whether you’re extending your swimming season, maintaining perfect temperature year-round, or simply want the most advanced, efficient pool heating available, the Silent-Pro 28 delivers unmatched performance.

🛒 Ready to Transform Your Swimming Experience?

Order your Norsup SG Silent-Pro 28 today and join thousands of satisfied pool owners enjoying comfortable, affordable, whisper-quiet pool heating.

Need sizing advice or installation help? Our expert team is standing by to ensure you get the perfect heat pump for your specific pool and requirements.