I-PAC+ 28 Side Outlet Inverter Heat Pump | 28kW 3-Phase All Year Round Pool Heating System 🌊

Transform your swimming pool experience with the I-PAC+ 28, a powerhouse 28kW inverter heat pump engineered for exceptional year-round performance. Designed by Dantherm specifically for the British climate, this advanced 3-phase heating system combines whisper-quiet operation, cutting-edge inverter technology, and intelligent Wi-Fi control to deliver the ultimate in pool comfort and energy efficiency.

Whether you’re extending your swimming season through colder months or maintaining perfect water temperatures year-round, the I-PAC+ 28 offers professional-grade heating performance in a compact, space-saving design that’s compliant with permitted development rights.

Extended Operating Range: Unlike standard heat pumps, the I-PAC+ 28 operates efficiently in temperatures from -10°C to 43°C, making it ideal for truly year-round pool heating in the UK climate.

Exceptional Efficiency: With an average COP (Coefficient of Performance) of 10.2, this heat pump delivers over 10 times more heat energy than the electricity it consumes, dramatically reducing your running costs compared to traditional pool heaters.

Ultra-Quiet Performance: The innovative Whisper Mode reduces noise levels by 9-11 dB(A) compared to standard heat pumps. At just 22.1-34.2 dB(A) at 10 meters, it’s quieter than a refrigerator, ensuring peaceful enjoyment for you and your neighbors.

Intelligent Heating Control: Advanced inverter technology continuously adjusts output from 20-100% to match your pool’s exact heating needs, eliminating the harsh on/off cycling of traditional heat pumps while maintaining perfect water temperature.

Future-Proof Eco Design: Uses R32 refrigerant with a low Global Warming Potential (GWP of 675), ensuring full F-Gas compliance and environmental responsibility without compromising performance.

Advanced Inverter Technology Explained ⚡

At the heart of the I-PAC+ 28 lies sophisticated DC inverter technology that revolutionizes pool heating efficiency and comfort.

How It Works

Traditional pool heat pumps operate with simple on/off cycles—running at full power until they reach temperature, then shutting off completely. This creates:

• Excessive energy consumption
• Temperature fluctuations
• Jarring electrical inrush currents
• Unnecessary noise
• Reduced component lifespan

The I-PAC+ 28’s inverter system is different. It continuously modulates compressor speed from 20% to 100% capacity, precisely matching your pool’s heat requirements in real-time. Think of it like cruise control for your pool temperature—smooth, efficient, and always optimized.

Real-World Benefits

✅ Dramatically Lower Running Costs – Uses only the energy needed at any given moment ✅ Consistent Water Temperature – No more temperature swings ✅ Whisper-Quiet Operation – Variable speed means less noise ✅ Smooth Power Delivery – No massive current spikes damaging your electrical system ✅ Extended Equipment Life – Reduced mechanical stress on components

Two Operating Modes for Maximum Flexibility 🎯

Boost Mode

Perfect for: Initial pool heating, rapid temperature recovery, pool start-up

• Heating capacity: 20% to 100% of maximum output
• Performance: Fastest possible heating
• Intelligent optimization: Automatically adjusts to optimal efficiency
• Use case: When you need maximum heating power quickly

Whisper Mode

Perfect for: Daily maintenance heating, overnight operation, noise-sensitive environments

• Heating capacity: 20% to 80% of maximum output
• Sound reduction: 3 dB(A) lower than Boost mode
• Performance: Energy-optimized for cost savings
• Use case: Maintaining temperature while keeping noise minimal

💡 Pro Tip: Start with Boost Mode for initial heating, then switch to Whisper Mode for quiet, efficient maintenance. The intelligent system will automatically optimize performance in either mode.

Complete Technical Specifications 📊

Performance Data – Air 27°C / Water 27°C / 80% RH

Specification	Value
Model Number	IPT28BLY
Heating Capacity	36.0 kW
COP Range	14.8 – 6.0
Average COP at 50% Speed	10.2

Performance Data – Air 15°C / Water 26°C / 70% RH

Specification	Value
Heating Capacity	23.9 kW
COP Range	7.5 – 4.6
Average COP at 50% Speed	6.3

Performance Data – Air 35°C / Water 28°C / 80% RH

Specification	Value
Cooling Capacity	16.0 kW

Electrical Specifications

Specification	Value
Power Supply	400V Three Phase 50Hz
Rated Input Power	0.64 – 5.20 kW
Rated Input Current	0.92 – 7.53 A
Maximum Input Current	9.5 A
Rated Fuse / MCB Type C	16 A
RCD Type	B 30 mA

Operating Parameters

Specification	Value
Operating Air Temperature Range	-10°C to 43°C
Water Heating Setting Range	18°C to 40°C
Water Cooling Setting Range	12°C to 30°C
Recommended Water Flow Rate	12.0 – 18.0 m³/h
Pressure Drop	0.85 m / 8.5 kPa
Pool Water Connections	1½” or 50mm Female

Physical & Environmental

Specification	Value
Dimensions (W × D × H)	1154 × 539 × 948 mm
Net Weight	120 kg
Casing Material	Aluminum Alloy
Refrigerant Type	R32
Refrigerant Charge	2.7 kg (2700g)
Refrigerant GWP	675
Minimum Installation Area Required	62.0 m²

Acoustic Performance

Measurement Distance	Sound Level
Sound Level @ 10m	22.1 – 34.2 dB(A)
Sound Level @ 1m	42.1 – 54.2 dB(A)

Key Components

Component	Specification
Compressor	DC Inverter (Stepless)
Heat Exchanger	High-Efficiency Twisted Titanium
Expansion Valve	EEV (Electronic Equalisation Valve)
Defrost System	Quick Reverse Cycle with 4-Way Valve

Pool Sizing & Heat-Up Time Estimates ⏱

Recommended Pool Sizes

The I-PAC+ 28 is ideally suited for:

• Surface Area: Up to 130-140 m² (approximately 1,400-1,500 sq ft)
• Pool Volume: 50-100 m³ (50,000-100,000 litres)
• Average Depth: 1.3-2.0 m

These recommendations assume an in-ground domestic pool with heat retention cover used at least 20 hours per day, sheltered location, and operation in the May-September season.

Estimated Heat-Up Times

⚠️ IMPORTANT DISCLAIMER: The following estimates are theoretical calculations based on the heat pump’s rated capacity under ideal conditions. Actual heat-up times will vary significantly based on numerous factors including:

• Ambient air temperature and humidity
• Wind exposure and weather conditions
• Pool insulation and construction type
• Use of pool cover (can reduce heating time by 40-60%)
• Starting water temperature
• Heat losses during heating period
• Actual COP at operating conditions

These estimates should be used as rough guidelines only, not guarantees.

Heat-Up Time Calculation Formula

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

Using the I-PAC+ 28’s heating capacity at 15°C air temperature: 23.9 kW

50 m³ Pool (50,000 Litres) – Various Temperature Rises

Starting Temp	Target Temp	Temp Rise	Estimated Time*
15°C	20°C	5°C	12.1 hours
15°C	25°C	10°C	24.3 hours
15°C	28°C	13°C	31.6 hours
20°C	25°C	5°C	12.1 hours
20°C	28°C	8°C	19.4 hours

*At 15°C ambient air temperature, using 23.9 kW capacity

75 m³ Pool (75,000 Litres) – Various Temperature Rises

Starting Temp	Target Temp	Temp Rise	Estimated Time*
15°C	20°C	5°C	18.2 hours
15°C	25°C	10°C	36.4 hours
15°C	28°C	13°C	47.3 hours
20°C	25°C	5°C	18.2 hours
20°C	28°C	8°C	29.1 hours

*At 15°C ambient air temperature, using 23.9 kW capacity

100 m³ Pool (100,000 Litres) – Various Temperature Rises

Starting Temp	Target Temp	Temp Rise	Estimated Time*
15°C	20°C	5°C	24.3 hours
15°C	25°C	10°C	48.5 hours
15°C	28°C	13°C	63.1 hours
20°C	25°C	5°C	24.3 hours
20°C	28°C	8°C	38.8 hours

*At 15°C ambient air temperature, using 23.9 kW capacity

Impact of Operating Conditions

The I-PAC+ 28’s performance varies with ambient conditions:

Air Temperature	Heating Capacity	Approximate COP	Relative Efficiency
-10°C	~18-20 kW	~4.0-4.5	Coldest conditions
0°C	~21-22 kW	~5.0-5.5	Cold weather
15°C	23.9 kW	6.3 average	Moderate conditions
27°C	36.0 kW	10.2 average	Optimal conditions

💡 Energy Saving Tips:

• Use a pool cover: Can reduce heat-up time by 40-60% and dramatically reduce running costs
• Heat gradually: Raising temperature 1-2°C per day is more efficient than rapid heating
• Optimize timing: Heat during warmer daytime hours for better COP
• Shelter the pool: Wind barriers reduce heat loss significantly

📄 Downloads & Documentation

Access comprehensive technical information and installation guidance:

📥 I-PAC Owner Installation Manual (opens in new tab) Complete installation guide covering safety procedures, electrical wiring diagrams, plumbing requirements, operation instructions, WiFi app setup, maintenance schedules, winterization procedures, troubleshooting codes, and full warranty conditions. Essential reading for installers and pool owners.

📥 Inverter Heat Pump Product Brochure (opens in new tab) Technical brochure featuring complete I-PAC range specifications, inverter technology explained, decibel comparison charts, COP performance data at various temperatures, domestic pool sizing graphs, and refrigerant information. Includes comparison data across the entire product range.

Smart Wi-Fi Control & Remote Operation 📱

Complete Pool Control from Your Smartphone

The I-PAC+ 28 features built-in Wi-Fi connectivity, allowing complete remote control via the dedicated mobile app for iOS and Android.

App Features

Temperature Management

• Set target water temperature (12-40°C)
• View real-time pool temperature
• Adjust settings from anywhere

Mode Control

• Switch between Boost and Whisper modes
• Select heating, cooling, or auto operation
• Schedule heating periods

Smart Timer Functions

• Program heating schedules
• Set automatic on/off times
• Optimize for off-peak electricity rates

System Monitoring

• View current operating status
• Check power consumption
• Receive maintenance alerts
• Monitor system performance

Multi-User Access

• Share control with family members
• Create user permissions
• Manage multiple devices from one app

Easy Setup

1. Download the dedicated app (iOS/Android)
2. Press the Wi-Fi button on the control panel for 3 seconds
3. Follow in-app pairing instructions
4. Connect to your home Wi-Fi network
5. Full control from anywhere with internet access

Note: The comprehensive Owner Installation Manual (linked above) includes detailed app setup instructions with screenshots.

Installation Requirements & Specifications 🔧

Electrical Requirements

⚠️ IMPORTANT: Professional installation by qualified electricians required

Power Supply

• 400V Three Phase 50Hz supply required
• Voltage limits: 360-440V (minimum-maximum)
• Frequency range: 47.5-52.5Hz
• Supply must maintain voltage while running

Protective Devices

• 16A Type C MCB or aM fuse required
• Type B RCD at 30mA rated for DC fault detection
• Isolator with 3mm minimum air gap when off
• Must disconnect all poles
• Must be within 2m and in line of sight of heat pump

Cable & Installation

• All work must comply with current IEE regulations
• Separate dedicated circuit required
• Earth bonding essential for all pool metalwork
• Cable entry points provided on unit

Clearance & Ventilation Requirements

Critical for Optimal Performance:

The heat pump requires adequate airflow to function efficiently. Minimum clearances:

• Front (air intake): 700mm clear space
• Rear (air discharge): 2500mm clear space
• Sides: 500mm each side
• Top: No overhead obstructions

❌ Never:

• Install in enclosed spaces without adequate ventilation
• Block air inlet or outlet grilles
• Allow discharge air to recirculate back into inlet
• Install near heat sources or naked flames

✅ Always:

• Position on solid, level base (concrete recommended)
• Secure with M10 bolts to prevent movement
• Install rubber feet (supplied) for vibration isolation
• Ensure proper drainage for condensate

Distance from Pool

For electrical safety compliance in wet areas:

• Minimum 3.5 meters from pool edge or spa
• Must comply with local electrical regulations for pool installations

Plumbing Requirements

Water Connections

• 1½” or 50mm female unions (supplied)
• Flow rate: 12.0-18.0 m³/h required
• Pressure drop: 0.85 m / 8.5 kPa

Required Components (Not Included)

• Bypass valve to regulate flow
• Isolation valves for maintenance
• Non-return valve
• Winterization drain valves
• Flow meter recommended

Important: Remove blanking disks from water connections before installation. Full plumbing diagram included in installation manual.

R32 Refrigerant Safety Requirements

Minimum Installation Area: 62.0 m²

This is calculated based on R32 refrigerant charge (2.7kg) and safety standards EN378-1:2016 to ensure refrigerant concentration remains safely below lower flammability limits in case of accidental leak.

Location Scenarios:

• Pool outside, heat pump outside: Automatically compliant (unlimited space)
• Pool outside, heat pump in plant room: Automatically compliant (room opens to outside)
• Pool inside, heat pump outside: Pool hall must exceed 62.0 m²
• Pool inside, heat pump in separate plant room: Pool hall must exceed 62.0 m²
• Pool inside, heat pump in connected plant room: Combined area must exceed 62.0 m²

7 Standout Features & Benefits ✨

1. Year-Round All-Weather Operation ❄️☀️

Extended temperature range from -10°C to 43°C means reliable heating even in harsh British winters. While standard heat pumps shut down at 0°C, the I-PAC+ 28 keeps working, extending your swimming season by months. The advanced defrost system quickly clears ice buildup, maintaining efficiency in freezing conditions.

2. Revolutionary Whisper-Quiet Technology 🔇

At just 22.1 dB(A) at 10 meters in Whisper Mode—quieter than rustling leaves—you’ll barely know it’s running. The variable-speed inverter compressor eliminates the harsh cycling noise of traditional heat pumps. Perfect for residential areas with noise-sensitive neighbors or for maintaining peaceful pool environments.

3. Exceptional Energy Efficiency 💰

Average COP of 10.2 means for every 1 kW of electricity consumed, you get 10.2 kW of heating—over 10 times more efficient than direct electric heating. At peak conditions (27°C ambient), COP reaches an incredible 14.8. Even at 15°C, the COP of 6.3 means significant savings versus gas or electric heaters.

Real-world example: Running costs can be 80% lower than traditional electric heaters and 50-60% lower than gas heating for pools.

4. Intelligent Climate Control 🌡️

The advanced EEV (Electronic Equalisation Valve) technology provides precise temperature control to 0.1°C accuracy. No more temperature swings—the pool stays at your exact preferred temperature. The system continuously monitors and adjusts, learning your pool’s characteristics for optimal performance.

5. Multi-Function Versatility 🔄

Not just a heater—three operating modes provide complete climate control:

• Heat Only: Ideal for UK climate, maintains perfect swimming temperature
• Cool Only: Lower water temperature during heat waves for refreshing swims
• Auto Mode: Automatically heats or cools to maintain your set temperature year-round

6. Premium Build Quality & Longevity 🛡️

Aerospace-grade aluminum alloy casing provides superior corrosion resistance in pool environments. The twisted titanium heat exchanger offers exceptional durability and resistance to pool chemicals. High and low pressure protection, soft-start technology, and wide voltage operation protect components and extend service life.

7. British-Engineered for British Weather 🇬🇧

Designed by Dantherm in the UK specifically for UK conditions—not a generic heat pump adapted from warmer climates. Engineered to handle British weather patterns, humidity levels, and temperature fluctuations. This means reliable performance when other heat pumps struggle.

Running Cost Analysis & Savings 💷

Understanding COP (Coefficient of Performance)

COP measures efficiency: COP of 10.2 means you get 10.2 kW heat for every 1 kW electricity used.

Estimated Running Costs

Assumptions for calculations:

• Pool volume: 75 m³ (75,000 litres)
• Target temperature: 28°C maintained
• Season: May-September (22 weeks)
• Electricity rate: £0.30/kWh
• Pool covered 20+ hours daily
• Ambient temperature: 15°C average

Daily Running Costs (Maintenance)

Once at temperature, maintaining heat requires approximately 6-8 hours operation daily:

I-PAC+ 28 (COP 6.3 at 15°C):

• Average power draw: 3.8 kW
• Daily electricity: 3.8 kW × 7 hours = 26.6 kWh
• Daily cost: £7.98

Weekly & Seasonal Costs

Period	I-PAC+ 28 Cost	Traditional Electric (9kW)	Gas Heater	Your Savings
Weekly	£55.86	£441.00	£252.00	£196.14 – £385.14
Monthly	£239.40	£1,890.00	£1,080.00	£840.60 – £1,650.60
Season (22 weeks)	£1,228.92	£9,702.00	£5,544.00	£4,315.08 – £8,473.08

💡 Your I-PAC+ 28 could save £4,300-£8,400 per season versus other heating methods.

Comparison with Other Heating Methods

Running Cost Comparison (Per Season):

Heating Method	Approximate Cost	Efficiency	Environmental Impact
I-PAC+ 28	£1,200-£1,500	COP 6-10	Very Low (R32 refrigerant)
Standard Heat Pump	£1,800-£2,400	COP 4-6	Low
Gas Heater	£5,000-£6,000	80-90%	Moderate (fossil fuel)
Electric Heater	£9,000-£10,000	100%	High (grid electricity)
Oil Heater	£6,000-£7,500	75-85%	High (fossil fuel)

Factors Affecting Running Costs

Reduce costs further by:

• ✅ Using a quality pool cover (saves 40-60%)
• ✅ Lowering target temperature by 1-2°C (saves 10-15% per degree)
• ✅ Heating during off-peak hours (saves 20-40% if on time-of-use tariff)
• ✅ Sheltering pool from wind (saves 15-25%)
• ✅ Regular filter maintenance for optimal flow
• ✅ Using Whisper Mode for maintenance heating

Warning: Costs increase significantly without cover, in exposed locations, or with higher target temperatures.

Comprehensive FAQ – Everything You Need to Know ❓

Installation & Setup

Q: Do I need three-phase power for the I-PAC+ 28? A: Yes, the IPT28BLY model requires 400V three-phase power supply. If your property only has single-phase power, consider the IPT22ALY model (27.5kW, single-phase) or contact an electrician about installing three-phase supply. Many UK properties with larger pools already have three-phase available.

Q: Can I install this heat pump myself? A: No. Installation must be completed by qualified professionals:

• Electrical work: Certified electrician familiar with IEE regulations
• Plumbing: Professional pool technician or plumber
• F-Gas work: If any refrigeration system work needed, must be F-Gas registered engineer

DIY installation voids warranty and may be illegal under UK regulations.

Q: How far can the heat pump be from my pool? A: Minimum 3.5 meters from pool edge (electrical safety requirement). Maximum distance depends on plumbing layout but typically 10-20 meters is practical. Longer distances increase pipe heat loss and pump requirements. The optional remote control panel can be installed up to 10 meters from the heat pump unit.

Q: What base or foundation does it need? A: Requires a solid, level concrete base or equivalent solid foundation. Must support 120kg weight and be secured with M10 bolts. Anti-vibration rubber feet (supplied) should be installed. The base should be slightly raised to allow condensate drainage.

Operation & Performance

Q: How long does it take to heat my pool? A: Highly variable depending on many factors. For a typical 75,000 litre pool:

• 5°C rise (20°C to 25°C): Approximately 18-24 hours
• 10°C rise (15°C to 25°C): Approximately 36-48 hours

First-time heating from cold takes longest. Daily maintenance heating is much faster (2-3 hours). Using a pool cover can reduce heating time by 40-60%. See heat-up tables above for detailed estimates.

Q: What’s the difference between Boost and Whisper modes? A:

• Boost Mode: Maximum capacity (20-100%), fastest heating, higher noise, ideal for initial heating or rapid recovery
• Whisper Mode: Reduced capacity (20-80%), 3dB quieter, more economical for maintenance heating

Most users start with Boost mode then switch to Whisper for ongoing operation.

Q: Can it really work down to -10°C? A: Yes, the I-PAC+ 28 (Y-series) operates from -10°C to 43°C air temperature. However, performance decreases in colder weather:

• At -10°C: Reduced output, lower COP, frequent defrost cycles
• At 0°C to 15°C: Good performance, moderate efficiency
• At 15°C to 27°C: Optimal performance and efficiency

Most UK pool heating occurs at 10-20°C ambient, where the unit performs excellently.

Q: Does it make my pool colder in winter? A: No, it only operates when there’s heating demand. The heat pump will not run if ambient temperature is below set pool temperature or if conditions are unfavorable. However, you must properly winterize the system (drain water circuits) if not using during freezing weather to prevent damage.

Efficiency & Running Costs

Q: What does COP 10.2 actually mean for my energy bills? A: COP (Coefficient of Performance) of 10.2 means for every 1 kW of electricity the heat pump uses, it delivers 10.2 kW of heating to your pool. This is possible because heat pumps move heat rather than generate it. In practical terms:

• Using 1 kWh of electricity costs ~£0.30
• You get 10.2 kWh of heating worth
• Equivalent cost: £0.029 per kWh of heat (vs £0.30 for direct electric heating)
• You save approximately 90% on heating costs

Q: How much will it actually cost to run per month? A: Typical costs for 75,000L pool at 28°C (May-Sept):

• Daily: £6-10 depending on weather and cover usage
• Weekly: £40-70
• Monthly: £180-300
• Season (22 weeks): £1,200-1,500

Major variables: ambient temperature, pool cover usage, target temperature, wind exposure, and electricity tariff.

Q: Is it worth the running cost versus a gas heater? A: Absolutely. Annual savings comparison for 75,000L pool:

• I-PAC+ 28: ~£1,300/season
• Gas heater: ~£5,500/season
• Saving: £4,200 per season

The heat pump typically pays for itself in energy savings within 2-3 heating seasons.

Maintenance & Longevity

Q: What maintenance does it require? A: Routine maintenance is minimal:

• Monthly: Visual inspection, clean air filters if dusty, check for obstructions
• Quarterly: Check electrical connections, inspect water flow, verify correct operation
• Annually: Professional service recommended (refrigerant check, deep clean, full system test)
• Winter: Proper winterization if not in use (drain water circuits)

Full maintenance schedule in installation manual.

Q: How long will it last? A: With proper maintenance, expect:

• Compressor: 10-15 years
• Heat exchanger: 15-20 years (titanium is extremely durable)
• Electronic controls: 10-15 years
• Overall unit: 12-15 years typical lifespan

Regular maintenance and proper winterization significantly extend life. Many units exceed 15 years.

Q: What warranty is included? A: 5-year manufacturer’s warranty covering on-site parts and labor. Warranty conditions require:

• Professional installation
• Proper water chemistry maintained
• Appropriate electrical supply
• Regular maintenance
• Correct winterization

See full warranty document in installation manual for complete terms.

Q: What can damage it or void warranty? A: Warranty void if:

• Poor water chemistry (pH, chlorine, TDS outside specified ranges)
• Frost damage from improper winterization
• Incorrect electrical supply or installation
• Blocked airflow or inadequate clearances
• DIY repairs or modifications
• Use of incorrect water flow rates

Maintain proper pool chemistry and follow installation guidelines carefully.

Technical & Compatibility

Q: Will it work with my existing pool system? A: Compatible with most pool setups if you have:

• Adequate filtration pump (must provide 12-18 m³/h flow)
• 1½” or 50mm plumbing (adapters supplied)
• Three-phase 400V power available
• Proper clearance space for installation
• Bypass valve to regulate flow

Works with salt water pools, traditional chlorine pools, and most sanitizer systems. Consult installation manual for chemical compatibility limits.

Q: Can I use it with solar panels? A: Yes, excellent combination. Solar-heated water reduces heat pump workload during day. However:

• Don’t combine solar thermal and heat pump output simultaneously (use bypass valve)
• Solar PV panels generating electricity can power the heat pump
• Heat pump operates best during warmer daytime solar generation hours
• Can program heat pump to run during peak solar production

Q: Can I connect it to my home automation system? A: The built-in WiFi allows control via dedicated mobile app. The optional remote control panel provides wired connection. For integration with home automation (Alexa, Google Home, etc.), you may need third-party integration modules—consult with smart home installer.

Q: What happens during a power cut? A: The heat pump safely shuts down when power is lost. When power returns:

• Unit restarts automatically based on temperature demand
• Previous settings are retained in memory
• No manual restart required
• Timer settings resume

⚠️ Note: Heat pump may start without warning when power returns—keep RCD protection active.

Noise & Neighbors

Q: How loud is “whisper quiet” really? A: At 10 meters distance:

• Whisper Mode: 22.1-34.2 dB(A)
• For comparison:
  • 20 dB(A) = Rustling leaves
  • 30 dB(A) = Whisper
  • 40 dB(A) = Refrigerator
  • 50 dB(A) = Moderate rainfall

Most users describe it as “barely noticeable” in Whisper Mode. Boost Mode is slightly louder but still quieter than conversation.

Q: Will it disturb my neighbors? A: Unlikely, especially in Whisper Mode. Tips to minimize any concerns:

• Install away from neighbor’s windows/bedrooms
• Use Whisper Mode for night operation
• Position unit considering prevailing wind direction
• Ensure proper mounting to prevent vibration
• Communicate with neighbors before installation

The 9-11 dB(A) reduction vs. traditional heat pumps makes a significant difference to perception.

Troubleshooting & Support

Q: What if the error codes appear on the display? A: The unit displays protection codes (E1-Eb) and fault codes (P0-FA). Common codes:

• E3: No water flow (check filter, valves, pump)
• E5: Voltage out of range (check power supply)
• Eb: Ambient temperature out of range (wait for better conditions)

Full code list and solutions in installation manual pages 33-34. For persistent issues, contact installer or Dantherm service: +44(0)1621 856611 (option 4).

Response typically within 1 business day for technical queries.

Environmental Credentials & F-Gas Compliance 🌍

R32 Refrigerant – The Eco-Friendly Choice

The I-PAC+ 28 uses R32 refrigerant, representing a significant environmental advancement over older refrigerants:

Global Warming Potential (GWP): 675

• 3× lower than R410A (GWP 2088)
• 7× lower than R404A (GWP 3922)
• Dramatically reduced climate impact

Zero Ozone Depletion Potential (ODP)

• Does not harm the ozone layer
• Fully compliant with Montreal Protocol

F-Gas Regulation Compliance

• Meets 2025 EU/UK F-Gas phase-down requirements
• Future-proof against tightening environmental legislation
• No risk of expensive refrigerant replacement

Efficiency Benefits

• Requires less refrigerant charge per kW output
• Better thermodynamic properties improve efficiency
• Easier to reuse and recycle at end-of-life

Energy Efficiency Impact

Carbon Footprint Reduction: Using a pool cover and heat pump combination can reduce CO2 emissions by 80-85% versus fossil fuel heating:

• Electric resistance heating: ~450 kg CO2/season
• Gas heating: ~800 kg CO2/season
• I-PAC+ 28 heat pump: ~120-150 kg CO2/season
• Saving: 600-680 kg CO2 annually (equivalent to driving 2,500+ miles)

Safety Classification: A2L

R32 is classified as A2L (low toxicity, lower flammability):

• Very difficult to ignite in practical use
• Safe for residential applications
• Requires specific room size minimums (62 m² for this unit)
• Professional installation and service mandatory

Package Contents & Optional Accessories 📦

Included in the Box

✅ I-PAC+ 28 Main Unit (IPT28BLY)

• Factory tested and refrigerant pre-charged
• Ready for installation

✅ Water Union Connectors

• 2× 1½” adapters
• 2× 50mm adapters
• Compatible with standard pool plumbing

✅ Rubber Vibration-Isolation Feet

• Set of 4 anti-vibration mounts
• Reduces noise transmission
• Protects base from moisture

✅ Condensate Drainage Kit

• Hose and adapter fittings
• Essential for proper water drainage
• Prevents base corrosion

✅ Documentation

• Complete installation manual (multilingual)
• Quick start guide
• Warranty registration card

Optional Accessories (Sold Separately)

📱 Remote Control Panel Kit

• Indoor installation up to 10m from heat pump
• 10m extension cable included
• Full function control away from outdoor unit
• Ideal when controls would be wall-obscured
• Recommended for: Installations where built-in controls aren’t easily accessible

🛡️ Winter Protection Cover

• Custom-fitted weather protection
• Breathable material prevents condensation
• Protects against snow, ice, and debris
• Recommended for: Extended shutdown periods or harsh winter storage

⚠️ Important: Even with winter cover, proper winterization (water drainage) is essential in freezing conditions.

Quality Assurance & Warranty 🛡️

5-Year Manufacturer’s Warranty

Comprehensive Coverage:

• Parts: All components covered
• Labour: On-site repair labour included
• Duration: Full 5 years from installation date

What’s Covered:

• Manufacturing defects in materials or workmanship
• Compressor failure under normal use
• Heat exchanger defects
• Electronic control board failures
• Component malfunctions

Warranty Requirements

To maintain full warranty coverage:

✅ Professional Installation Required

• Must be installed by qualified technician
• Electrical work by certified electrician
• Refrigeration work by F-Gas registered engineer

✅ Water Chemistry Maintenance Maintain pool water within specified ranges:

• pH: 7.2 – 7.8
• Total alkalinity: 80-120 ppm
• Free chlorine: 1-2 ppm (domestic)
• Total dissolved solids: <1,000 ppm
• Maximum salt content: 35,000 ppm

✅ Proper Winterization

• Annual drain-down procedure if temperatures drop below 0°C
• Follow documented winterization procedure
• Failure to winterize voids warranty for frost damage

✅ Correct Electrical Supply

• Voltage must remain within 360-440V range
• Proper circuit protection installed
• RCD/MCB correctly rated

✅ Adequate Airflow

• Maintain minimum clearances
• Keep air filters clean
• No recirculation of exhaust air

Quality Certifications

British Engineering Excellence

• Designed by Dantherm in the United Kingdom
• Specifically engineered for UK climate conditions
• ISO 9001 Registered Quality Management (Certification 015)

Safety & Compliance

• CE marked for European Union compliance
• Meets EMC 2004/108/EC electromagnetic compatibility standards
• F-Gas regulation compliant
• RoHS compliant for environmental protection

Component Quality

• Twisted titanium heat exchanger (superior corrosion resistance)
• Aluminum alloy casing (aerospace-grade)
• Inverter compressor (Japanese technology)
• Commercial-grade electronic controls

Why Buy from Parts4Tubs? 🏆

✅ Authorized UK Distributor Genuine Dantherm/Calorex products with full manufacturer warranty

✅ Expert Technical Support Knowledgeable staff available for sizing and specification advice

✅ Competitive Pricing Industry-leading prices on professional pool equipment

✅ Fast UK Delivery Quick dispatch on in-stock items across the United Kingdom

✅ Trade & Retail Welcome Serving pool professionals and homeowners since [year]

Ready to Transform Your Pool Heating? 🌊

The I-PAC+ 28 represents the pinnacle of swimming pool heating technology—combining British engineering excellence, cutting-edge inverter technology, and environmental responsibility into one whisper-quiet, ultra-efficient package.

Perfect for:

• Larger domestic pools (75-100+ m³)
• Year-round swimming enthusiasts
• Properties with three-phase power
• Noise-sensitive environments
• Energy-conscious pool owners
• UK climate conditions (-10°C to 43°C operation)

Key Investment Benefits:

• 💰 Save £4,000-8,000 per season on heating costs
• 🔇 Ultra-quiet operation (22.1 dB(A) in Whisper Mode)
• ⚡ Exceptional efficiency (COP up to 14.8)
• 🌍 Eco-friendly R32 refrigerant
• 📱 Smart WiFi control from anywhere
• 🛡️ 5-year comprehensive warranty
• 🇬🇧 British-designed for UK weather

Questions? Get Expert Advice

Need help determining if the I-PAC+ 28 is right for your pool?

Our technical team can assist with:

• Pool sizing calculations
• Electrical requirement verification
• Installation planning
• Running cost estimates
• Product comparisons

Important Final Notes ⚠️

Please Read Before Purchase:

1. Three-phase power required – Verify you have 400V 3-phase supply available
2. Professional installation mandatory – Not suitable for DIY installation
3. Adequate space required – Minimum clearances must be maintained (see specifications)
4. Pool chemistry critical – Maintain water quality within specified parameters
5. Winterization essential – Must drain water circuits in freezing conditions
6. Minimum area requirement – Installation area must meet 62 m² minimum for R32 safety

Delivery Information:

• Unit weight: 120kg
• Dimensions: 1154 × 539 × 948 mm
• Packed weight: Approximately 130kg
• Requires secure ground-level delivery
• Forklift or pallet jack recommended for unloading

Technical Downloads & Resources 📚

All technical documentation for the I-PAC+ 28:

📥 Complete Owner & Installation Manual (opens in new tab)

📥 Inverter Heat Pump Product Brochure (opens in new tab)