🌊 Norsup SG Silent-Pro 28T Three-Phase Inverter Swimming Pool Heat Pump – 28kW, WiFi-Enabled, Ultra-Quiet Heating for 70-115m³ Pools

Transform your pool into a year-round oasis with Europe’s most advanced three-phase inverter heat pump. The Norsup SG Silent-Pro 28T delivers professional-grade heating performance with whisper-quiet operation starting from just 19dB(A) – quieter than a library. Designed for large residential and commercial pools, this powerhouse heats 70-115m³ of water with exceptional energy efficiency, even when temperatures plummet to -15°C.

This isn’t just another pool heater – it’s an engineering masterpiece that pays for itself.

✅ Ultra-Quiet Operation – Starts at 19dB(A), won’t disturb neighbours or your peace
✅ Three-Phase Power – Professional 380V performance for large pools
✅ Extreme Weather Capable – Operates reliably down to -15°C ambient temperature
✅ WiFi Smart Control – Control from anywhere via smartphone app (NorsupOne)
✅ SmartGrid Ready – Integrates with time-of-use tariffs to slash running costs
✅ Inverter Technology – Variable speed operation saves up to 40% on energy bills
✅ Premium Build Quality – Titanium heat exchanger resists chlorine and salt
✅ Extended Warranty – 4 years on heat pump, 10 years on compressor & heat exchanger

📊 Key Specifications at a Glance

Specification	Details
Model	SG Silent-Pro 28T
Part Number	7036145
Heating Capacity	7.7 – 28.0 kW
Power Supply	380V 3-Phase (400VAC)
Rated Current	9A
Suitable Pool Volume	70 – 115 m³
COP (Efficiency)	Up to 16.0 at 27°C ambient
Noise Level	19 dB(A) (1m distance, minimum)
Operating Range	-15°C to +43°C ambient
Water Connection	50mm
Dimensions (L×W×H)	1210 × 530 × 900 mm
Refrigerant	R32 (eco-friendly)
Heat Exchanger	Titanium twisted tube in PVC
Compressor	Panasonic inverter rotary
Control	Full-colour touchscreen + WiFi

🏊 Pool Sizing Guide – Is This the Right Heat Pump for You?

The Silent-Pro 28T is ideal for:

💧 Pool Volume: 70-115 m³ (15,000-25,000 gallons)
📏 Typical Pool Dimensions:

• 10m × 5m × 1.5m depth = 75m³
• 12m × 5m × 1.5m depth = 90m³
• 14m × 5m × 1.5m depth = 105m³

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

⚠️ Important: This is a three-phase heat pump requiring 380V/400V electrical supply. Three-phase power is common in commercial properties and some larger homes. If you’re unsure whether you have three-phase power, check with your electrician or contact us for guidance.

⏱️ Heat-Up Time Estimates

How long will it take to heat my pool? Here are realistic estimates based on the SP28T’s 18.9kW output at typical spring/autumn conditions (15°C ambient temperature):

🌡️ Temperature Rise Calculator

Pool Volume	Temperature Rise	Estimated Time
70 m³	5°C (e.g., 20°C → 25°C)	24 hours
70 m³	10°C (e.g., 15°C → 25°C)	48 hours
90 m³	5°C (e.g., 20°C → 25°C)	31 hours
90 m³	10°C (e.g., 15°C → 25°C)	62 hours
105 m³	5°C (e.g., 20°C → 25°C)	36 hours
105 m³	10°C (e.g., 15°C → 25°C)	72 hours

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

⚠️ Important Disclaimers:

• These are estimates based on ideal conditions with good pool cover usage
• Actual times vary based on: ambient temperature, wind exposure, pool insulation, water evaporation, and cover quality
• Initial heat-up takes longer; maintaining temperature uses far less energy
• A quality pool cover can reduce heating time by 30-50%

🌤️ Seasonal Performance

Spring/Summer (15-27°C ambient):

• COP: 6.5-16.0 (exceptional efficiency)
• For every 1kW of electricity, you get 6.5-16kW of heat
• Running cost: Approximately £0.06-£0.15 per kWh of heat delivered

Autumn/Winter (0-15°C ambient):

• COP: 3.75-6.5 (still very efficient)
• Continues heating reliably even as temperatures drop
• Running cost: Approximately £0.15-£0.26 per kWh of heat delivered

Extreme Cold (-15 to 0°C):

• Still operational when gas heaters struggle
• Automatic defrost cycle maintains performance
• Perfect for year-round pool facilities

📥 Downloads & Documentation

📄 Installation & User Manual (Multi-Language)

Download Installation Manual (opens in new tab)
Complete guide covering installation procedures, electrical wiring diagrams, plumbing connections, initial startup, operation instructions, maintenance schedules, troubleshooting, and fault code reference. Available in English, German, French, Dutch, Danish, and Swedish. Essential reading before installation.

📄 WiFi Controller Manual

Download WiFi Module Guide (opens in new tab)
Step-by-step instructions for setting up the included WiFi module, connecting to the NorsupOne smartphone app, configuring timer schedules, remote operation, and adjusting advanced settings. Includes QR codes for app download and detailed troubleshooting.

📄 Technical Datasheet

Download Technical Specifications (opens in new tab)
Comprehensive performance data including heating capacity at multiple ambient temperatures (A27, A15, A10, A5, A0, A-5), COP values, electrical specifications, dimensions, and noise levels for the complete Silent-Pro range. Essential for system design and specification.

🎯 Advanced Features That Set the Silent-Pro 28T Apart

1️⃣ Inverter Technology – The Smart Way to Heat

Unlike fixed-speed heat pumps that constantly cycle on/off (wasting energy and creating temperature swings), the Silent-Pro 28T uses full-inverter technology:

• Variable speed compressor adjusts output from 7.7kW to 28kW
• Runs continuously at optimal speed for your pool’s needs
• Eliminates energy-wasting start/stop cycles
• Maintains precise water temperature (±0.5°C)
• Saves 30-40% on running costs compared to fixed-speed models

2️⃣ Triple Operating Modes

🚀 Power Mode – Maximum heating speed when you need rapid heat-up
🧠 Smart Mode – AI-optimised balance of speed and efficiency (recommended)
🔇 Silent Mode – Ultra-quiet operation for nighttime running (can be scheduled)

3️⃣ SmartGrid Integration

Cut your electricity costs by up to 50% by taking advantage of off-peak tariffs:

• External signal input allows utility companies to control operation
• Automatically shifts heavy heating to cheap-rate periods
• Compatible with Economy 7, Economy 10, and smart tariffs
• Built-in timer scheduling even without SmartGrid signal

4️⃣ WiFi Smart Control (NorsupOne App)

Control your pool heating from anywhere in the world:

• 📱 iOS and Android apps (free download)
• 🌡️ Real-time temperature monitoring
• ⏰ Advanced scheduling (daily, weekly programs)
• 📊 Energy consumption tracking
• 🔔 Push notifications for alerts
• 🏠 Alexa and Google Home compatible

5️⃣ Whisper-Quiet Double-Sided Airflow

Starting at just 19dB(A) – quieter than a whisper:

• Horizontal fan design with double air intake
• Fully variable-speed DC fan motor
• Sound-dampening compressor mounting
• Acoustic insulation throughout cabinet
• 10m distance: 23-33 dB(A) – won’t disturb neighbours

6️⃣ Premium Titanium Heat Exchanger

Built to last 20+ years in harsh pool environments:

• Twisted titanium tubes for maximum heat transfer
• Completely resistant to chlorine, salt, and chemicals
• PVC outer casing prevents corrosion
• Single-wall design (not for potable water)
• Covered by 10-year warranty

7️⃣ All-Weather Operation

Works when other heat pumps give up:

• Operates reliably down to -15°C ambient temperature
• Automatic defrost cycle prevents ice buildup
• Winterisation mode protects against freezing
• Included winter cover for seasonal storage
• Perfect for commercial year-round facilities

💰 Running Cost Comparison

See how much you’ll save compared to alternative heating methods:

Example: Heating a 90m³ Pool from 15°C to 28°C (13°C rise)

Heating Method	Energy Needed	Cost per kWh	Total Cost	Time Required
Silent-Pro 28T (COP 6.5)	234 kWh electricity	£0.24	£56	62 hours
Gas Boiler (80% efficient)	1,952 kWh gas	£0.06	£117	48 hours
Electric Heater (100% efficient)	1,560 kWh electricity	£0.24	£374	52 hours
Oil Boiler (75% efficient)	2,080 kWh oil	£0.08	£166	48 hours

💡 Annual Savings: Typical UK pool uses 3,000-5,000 kWh of heating per season. The Silent-Pro 28T saves £300-£800 annually vs gas, and £1,500-£2,500 vs electric heating.

Calculations based on: Silent-Pro 28T COP of 6.5 at A15/W26, UK average electricity price £0.24/kWh, gas £0.06/kWh. Your actual costs may vary.

🔧 Installation Requirements

Electrical Requirements ⚡

⚠️ This is a THREE-PHASE heat pump – professional installation essential

• Power Supply: 380-400V 3-Phase 50Hz
• Rated Current: 9A
• Minimum Circuit Breaker: 25A (three-pole)
• RCD Protection: 30mA residual current device required
• Cable Size: Minimum 3×2.5mm² (consult electrician)
• Earth Connection: Mandatory bonding to pool water

DO NOT ATTEMPT TO CONNECT TO SINGLE-PHASE (230V) POWER – This will damage the unit and void your warranty.

Plumbing Requirements 💧

• Water Connection: 50mm slip-fit or threaded PVC
• Flow Rate Required: 8.1 m³/h (81 liters/minute)
• Maximum Water Pressure Drop: 7 kPa
• Installation Position: After filter, before chlorinator/chemical feeders
• Bypass Valve: Recommended for flow control and winterisation
• Flow Switch: Included (prevents operation without water flow)

Space & Clearance Requirements 📏

Minimum clearances for optimal performance:

• Front (air outlet): 1,500mm clear space
• Sides (air intake): 700mm each side
• Back: 300mm from walls
• Top: 500mm overhead clearance

Base Requirements:

• Level, solid concrete pad recommended
• Anti-vibration pads included
• Adequate drainage for condensate (2-5 liters/hour in humid conditions)

Location Considerations 🌍

✅ Good Locations:

• Open outdoor area with good airflow
• Protected from direct sun (extends lifespan)
• Within 7.5m of pool (minimises heat loss)
• Away from bedroom windows (even though it’s quiet)
• Accessible for annual servicing

❌ Avoid:

• Enclosed spaces with limited air volume
• Areas with recirculated air (reduces efficiency by 20-40%)
• Near shrubs/vegetation blocking air intake
• Positions where discharge air blows at people/plants

🛡️ What’s Included in the Box

Standard Package Contents:

✅ Silent-Pro 28T main unit
✅ Full-colour touchscreen wire controller with 10m cable
✅ WiFi module (pre-installed)
✅ Winter protective cover
✅ Installation/user manual (multi-language)
✅ WiFi setup guide
✅ Condensate drain fitting and tubing
✅ Anti-vibration mounting pads
✅ Cable glands and electrical connectors

You’ll Need to Source Separately:

🔧 50mm PVC pipe and fittings for water connections
🔧 Appropriate three-phase electrical cable (consult electrician)
🔧 Circuit breaker and RCD protection
🔧 Concrete pad or suitable base (optional but recommended)
🔧 Bypass valve kit (recommended)

🏅 Technical Excellence – Inside the Silent-Pro 28T

Panasonic Inverter Compressor

The heart of exceptional performance:

• Variable-speed rotary compressor technology
• Adjusts capacity from 30% to 100%
• Soft-start function prevents voltage spikes
• Refrigerant: R32 (GWP 675 vs R410A GWP 2,088)
• Covered by 10-year warranty

Premium Evaporator Coil

• High-efficiency louvred aluminium fins
• Optimised for heat transfer at low temperatures
• Blue hydrophilic coating for better drainage
• Corrosion-resistant in coastal environments

Intelligent Control System

• Full-colour 5″ touchscreen display
• Real-time display of: water temp, ambient temp, operating status
• Intuitive menu system (5 languages)
• Comprehensive fault diagnosis with error codes
• Data logging for service engineers

Safety Features

🔒 High Pressure Switch – Prevents refrigerant over-pressure
🔒 Low Pressure Switch – Protects compressor from under-charge
🔒 Water Flow Switch – Prevents operation without circulation
🔒 Anti-Freeze Protection – Multiple levels prevent freeze damage
🔒 Over-Current Protection – Compressor and fan protection
🔒 Phase Loss Protection – Detects missing phase (three-phase models)
🔒 Exhaust Temperature Sensor – Prevents compressor overheating

🌍 Environmental Credentials

Heat responsibly with the planet in mind:

♻️ R32 Refrigerant – 68% lower global warming potential than R410A
♻️ Energy Label Rating: A
♻️ Renewable Energy – Extracts 75% of heat energy from ambient air
♻️ WEEE Compliant – Fully recyclable at end of life
♻️ RoHS Compliant – Free from hazardous substances
♻️ Low Carbon – Reduces CO₂ emissions by 70% vs gas heating

Every kWh of electricity produces 6-16 kWh of heat – that’s 75-94% renewable energy from the air around you.

🎓 Frequently Asked Questions

Q1: Can I install this heat pump myself?

A: No, we strongly recommend professional installation by a qualified electrician and pool technician. The SP28T requires:

• Three-phase electrical connection (380V/400V)
• Proper earthing and RCD protection
• Correct plumbing integration with bypass
• Commissioning and pressure testing

Improper installation voids warranty and can be dangerous. We can recommend certified installers in your area.

Q2: Why is three-phase power better for large pools?

A: Three-phase power offers several advantages for high-capacity heat pumps:

• More balanced load – spreads power draw across three phases
• Smaller cable sizes – more cost-effective installation
• Better motor efficiency – inverter compressors run smoother
• Reduced current per phase – less stress on electrical system

For pools over 80m³, three-phase heat pumps are the professional choice. Most commercial properties and some larger homes already have three-phase supply.

Q3: How much does it cost to run per hour?

A: Running costs vary with ambient temperature and pool condition:

Spring/Summer (15-27°C ambient):

• Typical power draw: 2-4kW
• Cost: £0.48-£0.96 per hour (at £0.24/kWh)
• Delivers: 13-28kW of heating (COP 6.5-16)

Autumn/Winter (0-15°C ambient):

• Typical power draw: 3-5kW
• Cost: £0.72-£1.20 per hour
• Delivers: 11-19kW of heating (COP 3.75-6.5)

Once pool is at temperature, the heat pump runs intermittently to maintain heat, typically 4-8 hours per day depending on season and pool cover usage.

💡 Top tip: Use Smart or Silent mode with a pool cover to minimise running costs. A good cover reduces heat loss by 70%.

Q4: Will this work with my existing pool pump and filter?

A: Yes, the Silent-Pro 28T integrates easily with any standard pool filtration system:

1. Install after the filter (clean water protects the heat exchanger)
2. Install before any chlorinators or chemical feeders
3. Ensure your circulation pump can deliver 8.1m³/h (81 L/min) flow rate
4. The heat pump includes a flow switch to prevent operation if flow is too low

Most pool pumps provide adequate flow. If unsure, check your pump’s specification or consult with us.

Q5: Can I heat my pool in winter?

A: Yes! The Silent-Pro 28T operates reliably down to -15°C ambient temperature:

• Autumn (5-15°C): Excellent performance, extend your swimming season
• Winter (0-5°C): Continues heating, perfect for year-round pools with covers
• Extreme cold (-15 to 0°C): Still operational with automatic defrost

However, heating an outdoor pool in winter is expensive due to heat loss. We recommend:

• Use a high-quality insulated pool cover (reduces heat loss by 70%)
• Consider a solar cover for daytime heat gain
• Run heating during off-peak hours with SmartGrid/timer
• For year-round swimming, consider pool enclosure

The SP28T is ideal for indoor pools, covered outdoor pools, or extending the season from April-October in the UK.

Q6: How quiet is “ultra-quiet” operation?

A: The Silent-Pro 28T is exceptionally quiet compared to standard pool heat pumps:

Noise levels:

• Minimum (Silent Mode): 19 dB(A) at 1m – quieter than a library
• Normal Operation: 43-53 dB(A) at 1m – similar to quiet conversation
• At 10m distance: 23-33 dB(A) – barely noticeable

For context:

• Whisper: 20 dB(A)
• Quiet library: 30 dB(A)
• Normal conversation: 60 dB(A)
• Standard heat pump: 55-65 dB(A)

Why so quiet?

• Double-sided horizontal airflow (no high-velocity discharge)
• Variable-speed DC fan (runs slower when less heat needed)
• Sound-insulated cabinet
• Vibration-dampened compressor mounting

You can schedule Silent Mode for nighttime operation using the timer or WiFi app.

Q7: What’s the difference between COP and heating capacity?

A: These are two different but related measurements:

Heating Capacity (kW): The total amount of heat the pump delivers to your pool water

• SP28T range: 7.7 – 28 kW depending on ambient temperature

COP (Coefficient of Performance): Efficiency rating – heat output ÷ electrical input

• SP28T at 27°C: COP 16 means 1kW of electricity produces 16kW of heat
• SP28T at 15°C: COP 6.5 means 1kW of electricity produces 6.5kW of heat

Higher COP = lower running costs. The SP28T’s inverter technology maintains high COP across a wide temperature range, saving you money year-round.

Q8: Do I need to winterise the heat pump?

A: It depends on your usage:

If continuing to use through winter: No winterisation needed

• The unit has built-in anti-freeze protection
• Can operate down to -15°C
• Leave powered on to prevent freeze damage

If shutting down for winter:

1. Turn off and disconnect power
2. Drain water from heat exchanger using drain plugs
3. Ensure all water is removed to prevent freeze damage
4. Fit the included winter cover
5. Store in dry conditions if possible

Important: Even a small amount of water can cause freeze damage. Follow the manual’s winterisation procedure carefully.

Q9: What warranty is included?

A: The Silent-Pro 28T includes comprehensive warranty coverage:

🛡️ 4 Years – Complete heat pump unit
🛡️ 10 Years – Compressor
🛡️ 10 Years – Titanium heat exchanger

Warranty conditions:

• Installation by qualified professional required
• Register product within 30 days of purchase
• Annual servicing recommended (not mandatory for warranty)
• Covers manufacturing defects and component failure
• Does not cover frost damage from improper winterisation

Q10: How does SmartGrid save money?

A: SmartGrid technology lets you take advantage of time-of-use electricity tariffs:

How it works:

1. Your electricity supplier sends a signal when rates are cheap (typically 12am-7am)
2. The heat pump receives this signal via an external input
3. It automatically heats your pool during cheap-rate periods
4. Stores heat in the water (thermal battery effect)

Savings example:

• Peak rate: £0.34/kWh
• Off-peak rate: £0.11/kWh (68% cheaper)
• Annual saving: £200-£400 for typical pool

Even without SmartGrid, you can use the built-in timer to run during off-peak hours.

Q11: Can I use this for heating my house as well?

A: No, the Silent-Pro 28T is designed exclusively for swimming pool heating:

• Single-wall heat exchanger (not suitable for potable water)
• Optimised for pool water temperatures (26-30°C)
• Flow rates and connections designed for pool circulation

For combined home and pool heating, you need a dedicated hydronic heat pump system. Contact us for suitable alternatives.

Q12: What maintenance is required?

A: Minimal maintenance keeps your heat pump running efficiently:

Monthly checks (homeowner):

• ✅ Clear leaves/debris from air intake
• ✅ Check for unusual noises or vibrations
• ✅ Verify WiFi app shows normal operation

Annually (professional recommended):

• 🔧 Clean evaporator coil
• 🔧 Check refrigerant pressure
• 🔧 Inspect electrical connections
• 🔧 Test safety switches
• 🔧 Verify water flow rate
• 🔧 Check for leaks

Every 2-3 years:

• 🔧 Replace water filter (if fitted)
• 🔧 Check titanium heat exchanger for scale buildup

The Silent-Pro 28T is designed for low maintenance. The titanium heat exchanger resists scaling and corrosion far better than copper models.

🚚 Delivery & Returns

Delivery Information

📦 Free UK Mainland Delivery (see exclusions)
🚛 Courier Service: Professional carriers with tracking
📅 Delivery Time: 3-5 working days from order
📞 Pre-Delivery Call: Courier will arrange convenient delivery slot

Delivery Exclusions: Scottish Highlands, Northern Ireland, offshore islands, remote postcodes (surcharge may apply – contact us for quote)

What to expect:

• Kerbside delivery to your property
• Heat pump on pallet (approximately 125kg)
• You’ll need 2 people to move it into position
• Forklift/pallet truck hire available from local tool hire (if needed)

Returns Policy

We want you to be completely satisfied with your purchase:

✅ 30-Day Cooling-Off Period – Change your mind within 30 days
✅ Condition: Must be unused, in original packaging
✅ Return Shipping: Customer responsible (heat pump must be palletised)
✅ Refund: Full refund minus return shipping costs

Not applicable if:

• Unit has been installed or commissioned
• Packaging has been damaged or discarded
• Unit shows signs of use

Damaged in Transit?

• Inspect immediately upon delivery
• Photograph any damage while courier is present
• Contact us within 24 hours
• We’ll arrange replacement or collection

🏆 Why Buy From Parts4Tubs?

✅ Authorised Norsup Dealer – Full manufacturer warranty support
✅ Expert Technical Support – Our team knows these heat pumps inside out
✅ Competitive Pricing – Best value without compromising quality
✅ Fast Delivery – In stock for immediate dispatch
✅ Installation Support – Can recommend qualified installers in your area
✅ After-Sales Service – We’re here long after your purchase

📞 Need Help Choosing?

Not sure if the SP28T is right for your pool? Our team can help:

We can advise on:

• Pool volume calculations
• Three-phase electrical requirements
• Installation planning and costs
• Running cost estimates
• Suitable alternatives if needed

Prefer a different size? The Silent-Pro range is available from 13kW (single-phase) to 35kW (three-phase) to suit any pool.

⚠️ Important Safety Information

READ BEFORE PURCHASE:

🔌 Three-Phase Power Required – This heat pump operates on 380-400V three-phase electrical supply. DO NOT attempt to connect to single-phase (230V) power. Check with your electrician if unsure.

⚡ Professional Installation Essential – This is not a DIY product. Installation must be carried out by:

• Qualified electrician (for electrical connections)
• Certified pool technician (for plumbing integration)
• Compliance with Part P Building Regulations (UK)

🧊 Freeze Protection – The unit must be winterised or kept powered through winter to prevent frost damage. Freeze damage is not covered by warranty.

☣️ Refrigerant Safety – Contains fluorinated greenhouse gas R32 (GWP 675). Servicing and disposal must be carried out by F-Gas certified engineers.

🚫 Not for Potable Water – Single-wall heat exchanger design. This unit is for swimming pool water only, not drinking water systems.

📋 Technical Specifications – Complete Data

Performance Data (All Conditions)

Ambient Temp	Water Temp	Heating Capacity	Power Input	COP
A27/W27 (Summer)	27°C	7.7 – 28.0 kW	0.48 – 4.59 kW	16.0 – 6.1
A15/W25 (Spring)	26°C	4.9 – 18.9 kW	0.75 – 4.11 kW	6.5 – 4.6
A10/W25 (Autumn)	26°C	3.9 – 15.2 kW	0.74 – 4.10 kW	5.2 – 3.7
A5/W25 (Winter)	26°C	3.1 – 11.8 kW	0.74 – 3.95 kW	4.2 – 3.0
A0/W25 (Cold)	26°C	2.3 – 11.5 kW	0.73 – 3.95 kW	3.8 – 3.0
A-5/W25 (Very Cold)	26°C	2.3 – 11.3 kW	0.73 – 3.95 kW	3.6 – 3.0

Electrical Specifications

Parameter	Specification
Power Supply	380-400V / 3-Phase / 50Hz
Rated Current	9A
Maximum Current	12A
Minimum Fuse	25A (three-pole)
RCD Protection	30mA mandatory
Cable Size (minimum)	3 × 2.5mm²
Power Input Range	0.48 – 5.89 kW
Power Factor	>0.90
Starting Current	Soft start <15A

Hydraulic Specifications

Parameter	Specification
Water Connection	50mm (slip-fit or threaded)
Nominal Flow Rate	8.1 m³/h (81 L/min)
Flow Range	6.5 – 10.0 m³/h
Maximum Pressure Drop	7 kPa (at nominal flow)
Maximum Water Pressure	0.3 MPa (3 bar)
Water Temperature Range	9°C – 40°C
Heat Exchanger Type	Titanium twisted tube in PVC
Heat Exchanger Warranty	10 years

Refrigeration System

Component	Specification
Compressor Brand	Panasonic
Compressor Type	Inverter Rotary
Refrigerant Type	R32 (HFC-32)
Refrigerant Charge	[Contact for exact charge]
GWP Rating	675 (vs R410A: 2088)
High Pressure Switch	4.2 MPa cutout
Low Pressure Switch	0.1 MPa cutout

Fan System

Parameter	Specification
Fan Quantity	1
Fan Type	Horizontal discharge
Fan Motor	DC variable speed
Speed Range	500 – 800 RPM
Power Input	150W maximum
Airflow Direction	Double-sided horizontal
Noise Level (1m)	43 – 53 dB(A)
Noise Level (10m)	23 – 33 dB(A)

Dimensions & Weight

Parameter	Specification
Length	1,210 mm
Width	530 mm
Height	900 mm
Net Weight	[See nameplate]
Shipping Weight	[See package]
Shipping Dimensions	[See package label]

Operating Limits

Parameter	Range
Ambient Temperature	-15°C to +43°C
Water Temperature	9°C to 40°C
Maximum Humidity	95% RH
Maximum Altitude	1,000m above sea level
Automatic Defrost	Activated below +7°C

Control System

Feature	Specification
Controller Type	Full-colour touchscreen
Display Size	5 inch diagonal
Languages	5 (English, German, French, Dutch, Danish)
WiFi Module	Included (pre-installed)
WiFi App	NorsupOne (iOS/Android)
Control Modes	Power / Smart / Silent
Timer Functions	On/Off daily/weekly programs
Silent Mode Timer	Separate programmable schedule

Standards & Certifications

✅ CE Marked
✅ Energy Label: A
✅ IP Rating: IPX4 (splash protected)
✅ F-Gas Regulation Compliant
✅ WEEE Directive 2002/96/EC
✅ RoHS Directive 2002/95/EC
✅ Low Voltage Directive 2014/35/EU
✅ Electromagnetic Compatibility 2014/30/EU

🌟 Summary – Is the Silent-Pro 28T Right for You?

Perfect for: ✅ Large residential pools (70-115m³)
✅ Commercial and hotel pools
✅ Properties with three-phase power
✅ Year-round swimming facilities
✅ Noise-sensitive locations
✅ Energy-conscious pool owners
✅ Smart home enthusiasts

Not suitable if: ❌ Your pool is under 70m³ (consider SP13, SP17, or SP20)
❌ You only have single-phase (230V) electrical supply
❌ Your pool exceeds 115m³ (consider SP35T 35kW model)
❌ You need heating for drinking water (pools only)