🌊 I-PAC+ 16 Side Outlet Inverter Heat Pump | All Year Round 16kW Pool & Hot Tub Heating (IPT16ALY)

Transform your pool or hot tub into a year-round oasis of warmth and relaxation with the I-PAC+ 16 Inverter Heat Pump. Engineered for the UK climate by Dantherm, this premium 16kW heating system operates efficiently even in freezing temperatures down to -10°C, ensuring your water is always at the perfect temperature—winter, spring, summer, or autumn.

🎯 Key Benefits at a Glance

✅ All-Season Performance Operates reliably in temperatures from -10°C to 43°C—no winterization needed during cold snaps.

✅ Exceptional Energy Efficiency Average COP of 10.3 at 50% speed means you get over 10kW of heat for every 1kW of electricity used—dramatically lower running costs than traditional heaters.

✅ Whisper-Quiet Operation 9-11 dB(A) quieter than conventional heat pumps. Boost mode for rapid heating, Whisper mode for near-silent day-to-day operation.

✅ Intelligent Wi-Fi Control Adjust temperature, monitor performance, and schedule heating from anywhere using your smartphone or tablet.

✅ Eco-Friendly R32 Refrigerant Low Global Warming Potential (GWP 675) ensures F-Gas compliance and superior cold-weather performance.

✅ Premium Build Quality Robust aluminium alloy construction designed to withstand harsh UK weather conditions for years of reliable service.

✅ Comprehensive 5-Year Warranty Full on-site parts and labour warranty for complete peace of mind.

⚙️ How Inverter Technology Saves You Money

Traditional on/off heat pumps run at full power until the target temperature is reached, then shut off completely—cycling repeatedly and wasting energy. The I-PAC+ 16’s advanced inverter technology continuously adjusts compressor speed to match your exact heating requirements.

Real-World Savings:

• 50-70% lower running costs compared to gas or electric heaters
• 20-40% more efficient than traditional on/off heat pumps
• Eliminates power surges that stress your electrical system
• No constant start-stop cycling means longer equipment life

The inverter modulates from 20% to 100% capacity, delivering precisely the right amount of heat at any given moment. This means your pool or hot tub maintains stable temperature with minimal energy waste.

🌡️ Pool & Hot Tub Sizing Guide

Is the IPT16ALY Right for Your Pool?

Pool/Hot Tub Volume	Approximate Surface Area	Heat-Up Time*
20,000 – 30,000 litres	20 – 30 m²	24-36 hours
30,000 – 40,000 litres	30 – 40 m²	36-48 hours
40,000 – 50,000 litres	40 – 50 m²	48-60 hours
50,000 – 60,000 litres	50 – 60 m²	60-72 hours

✨ Heat-up times shown are estimates for initial heating from ambient temperature to 28°C in moderate conditions (15°C air temperature, pool with cover). Actual times vary based on air temperature, starting water temperature, pool insulation, wind exposure, and whether a cover is used.

Recommended Water Flow: 8.0-10.0 m³/h

Ideal For:

• Medium to large hot tubs (1,500 – 3,000 litres)
• Small to medium swimming pools (up to 50,000 litres)
• Plunge pools and swim spas
• Residential pool installations

💡 Pro Tip: Using a quality pool cover when not in use can reduce heat loss by up to 70% and dramatically improve efficiency.

📊 Estimated Heat-Up Times by Temperature Rise

Below are estimated times to heat various pool volumes with the IPT16ALY (16kW output). These calculations assume moderate weather conditions and use of a pool cover.

Small Pool / Large Hot Tub (20,000 litres / 20 m³)

Temperature Rise	Estimated Time*
5°C (e.g., 20°C → 25°C)	7.3 hours
8°C (e.g., 18°C → 26°C)	11.6 hours
10°C (e.g., 18°C → 28°C)	14.5 hours
12°C (e.g., 16°C → 28°C)	17.4 hours

Medium Pool (40,000 litres / 40 m³)

Temperature Rise	Estimated Time*
5°C (e.g., 23°C → 28°C)	14.5 hours
8°C (e.g., 20°C → 28°C)	23.2 hours
10°C (e.g., 18°C → 28°C)	29 hours
12°C (e.g., 16°C → 28°C)	34.8 hours

Large Pool (60,000 litres / 60 m³)

Temperature Rise	Estimated Time*
5°C (e.g., 23°C → 28°C)	21.8 hours
8°C (e.g., 20°C → 28°C)	34.8 hours
10°C (e.g., 18°C → 28°C)	43.5 hours
12°C (e.g., 16°C → 28°C)	52.2 hours

⚠️ Important Notes:

• Times are theoretical estimates using the formula: Time (hours) = (Volume in m³ × Temperature Rise in °C × 1.16) ÷ 16kW
• Actual times vary based on ambient air temperature, wind, pool insulation, starting water temperature, and whether a cover is used
• Colder air temperatures will increase heating time; warmer air will decrease it
• Using a pool cover reduces heat loss by up to 70% and significantly improves efficiency
• Once at temperature, the heat pump maintains it using minimal energy

💰 Running Cost Comparison

Why Heat Pumps Are the Most Cost-Effective Choice:

For a typical 40,000-litre pool heated to 28°C during the swimming season (May-September):

Heating Method	Approximate Annual Cost*	Energy Efficiency
IPT16ALY Heat Pump	£300 – £500	COP 6.3 – 10.3
Gas Boiler	£1,200 – £1,800	85-92% efficient
Electric Heater	£2,500 – £3,500	100% efficient**
Oil Heating	£1,500 – £2,200	80-85% efficient

Estimates based on current UK energy prices (£0.24/kWh electricity, gas equivalent). Actual costs vary by usage, insulation, and local climate.

**While electric heaters are 100% efficient at converting electricity to heat, heat pumps extract additional heat from the air, achieving 600-1000% efficiency (COP 6-10)—producing far more heat energy than the electricity consumed.

The Verdict: The I-PAC+ 16 typically pays for itself in energy savings within 2-4 years compared to traditional heating methods.

🔧 Complete Technical Specifications

Performance Data

Heating Performance @ 27°C Air / 27°C Water / 80% RH

• Heating Capacity: 21.0 kW
• COP Range: 14.8 – 6.4
• Average COP at 50% Speed: 10.3

Heating Performance @ 15°C Air / 26°C Water / 70% RH

• Heating Capacity: 14.5 kW
• COP Range: 7.1 – 4.6
• Average COP at 50% Speed: 6.3

Cooling Performance @ 35°C Air / 28°C Water / 80% RH

• Cooling Capacity: 9.5 kW

Electrical Specifications

Specification	Details
Power Supply	230V Single Phase 50Hz
Rated Input Power	0.41 – 3.15 kW
Rated Input Current	1.78 – 13.69 A
Maximum Input Current	17 A
Rated RCD Type	Type F, 30 mA
Rated Fuse / MCB Type C	25 A

Operating Parameters

Specification	Details
Operating Air Temperature Range	-10°C to +43°C
Water Heating Range	18°C to 40°C
Water Cooling Range	12°C to 30°C
Recommended Water Flow	8.0 – 10.0 m³/h
Pressure Drop	0.61 m / 6.0 kPa
Water Connections	1½” or 50mm Female

Physical & Construction

Specification	Details
Dimensions (W × D × H)	954 × 429 × 755 mm
Net Weight	68 kg
Construction Material	Premium Aluminium Alloy
Compressor Type	Stepless DC Inverter
Heat Exchanger	Twisted Titanium (corrosion-resistant)
Refrigerant Type	R32 (1.2 kg charge)
Refrigerant GWP	675 (Low Global Warming Potential)

Acoustic Performance

Location	Sound Level (Boost Mode)	Sound Level (Whisper Mode)
At 10 metres	20.4 – 33.7 dB(A)	17.4 – 30.7 dB(A)
At 1 metre	40.4 – 53.7 dB(A)	37.4 – 50.7 dB(A)

🔇 For Context: Whisper mode is quieter than a refrigerator (50 dB) and comparable to conversational speech at 10 metres distance.

📄 Downloads & Documentation

Access all technical information, installation guides, and specifications for your I-PAC+ 16 heat pump:

📥 Owner Installation Manual (opens in new tab) Complete installation instructions, technical specifications, wiring diagrams, maintenance procedures, and troubleshooting guides. Essential reading for installers and owners alike. (43 pages)

📥 Inverter Heat Pump Brochure (opens in new tab) Full product range overview, performance data, sizing charts, and comparison information for all I-PAC inverter heat pump models. Includes domestic pool sizing graphs and technical comparisons. (8 pages)

🌟 Advanced Features That Set the I-PAC+ Apart

Stepless DC Inverter Compressor

Variable-speed technology adjusts output from 20-100% capacity for optimal efficiency and temperature control.

EEV Technology (Electronic Expansion Valve)

Precise refrigerant flow control maximizes performance across all operating conditions.

Quick Reverse Cycle Defrosting

Automatic 4-way valve defrost system maintains efficiency even in sub-zero temperatures.

High-Efficiency Titanium Heat Exchanger

Twisted titanium design resists corrosion from pool chemicals while maximizing heat transfer.

Multiple Safety Protections

• High and low pressure protection
• Anti-freeze protection
• Flow switch protection
• Compressor overload protection
• Phase protection (prevents incorrect wiring damage)

Soft Start Technology

Wide voltage range application with gentle startup reduces electrical system stress.

Pool Pump Synchronization

Optional connection to pool pump timeclock (P1/P2 terminals) for intelligent operation scheduling.

Why Choose the I-PAC+ 16?

Unlike standard seasonal heat pumps, the IPT16ALY is specifically designed for all-year-round performance. Whether it’s a frosty January evening or a cool September night, this advanced inverter system maintains consistent heating while consuming significantly less energy than traditional on/off heat pumps. With whisper-quiet operation and intelligent Wi-Fi control, you’ll enjoy luxury heating without compromise.

🎮 Two Operating Modes for Every Situation

Boost Mode 🚀

• Heating Capacity: 20% to 100% of rated output
• Best For: Initial pool heating, rapid temperature recovery, cold weather operation
• Performance: Fastest possible heating with intelligent optimization

Whisper Mode 🔇

• Heating Capacity: 20% to 80% of rated output
• Sound Reduction: 3 dB(A) quieter than Boost mode
• Best For: Day-to-day temperature maintenance, noise-sensitive environments, night-time operation
• Performance: Super-quiet operation while maintaining comfortable temperatures

💡 Smart Tip: Use Boost mode for initial heat-up or when recovering from a cold snap, then switch to Whisper mode for nearly silent ongoing temperature maintenance.

📱 Wi-Fi Connectivity & Smart Control

Control Your Pool Heating From Anywhere:

The integrated Wi-Fi module allows complete remote control via smartphone or tablet:

✅ Adjust Target Temperature – Set your desired water temperature on the go ✅ Switch Operating Modes – Change between Heat/Cool/Auto and Boost/Whisper ✅ Monitor Performance – View current water temperature and system status ✅ Schedule Operation – Set heating schedules to match your routine ✅ Receive Alerts – Get notifications about system status and any issues

Compatible with iOS and Android devices. Simple app setup with step-by-step pairing instructions included in the manual.

📐 Installation Requirements

Positioning & Clearances

For optimal performance and to comply with safety regulations:

Clearance Direction	Minimum Distance
Front (Air Inlet)	700 mm
Sides	500 mm
Top (Air Outlet)	2,500 mm
Distance from Pool Edge	3,500 mm (electrical safety)

Mounting

• Must be secured with M10 bolts to a solid concrete base or corrosion-proof mounting brackets
• Unit must be kept level for proper condensate drainage
• Rubber feet (supplied) reduce vibration transmission

Ventilation Requirements

• Minimum free air discharge area: 0.229 m²
• Must not be installed in fully enclosed spaces
• Outlet air must not recirculate to inlet
• For indoor installation, adequate ventilation openings required

R32 Refrigerant Location Requirements

• Minimum room area for IPT16ALY: 12.3 m²
• Must be kept away from ignition sources and naked flames
• Room must be well-ventilated
• Refrigerant safety guidelines must be followed (see manual)

🛠️ What’s Included

Standard Package Contents:

• I-PAC+ 16 Inverter Heat Pump (IPT16ALY)
• Water union connectors (2 × 1½”, 2 × 50mm)
• Rubber feet (set of 4)
• Condensate drainage kit
• Installation and operation manual
• 5-year manufacturer warranty registration

Optional Extras Available:

• Remote control panel kit (10m extension cable) for indoor installation
• Winter protection cover (recommended for extreme weather)

❓ Frequently Asked Questions

What size pool can the IPT16ALY heat?

The IPT16ALY is ideally suited for pools up to 50,000-60,000 litres (approximately 40-50 m² surface area) or large hot tubs up to 3,000 litres. For precise sizing, consider your climate, desired temperature, and whether you use a pool cover. Refer to our sizing guide above or consult with your installer.

How does the “all year round” capability work?

The IPT16ALY operates efficiently in air temperatures from -10°C to +43°C. Its enhanced refrigeration system and R32 refrigerant allow it to extract heat from cold air that would defeat standard seasonal heat pumps. While heating capacity reduces in colder weather, the unit continues operating reliably through UK winters.

How much does it cost to run?

Running costs depend on pool size, desired temperature, climate, and usage pattern. For a typical 40,000-litre pool heated to 28°C during summer months, expect £300-£500 annually—far less than gas or electric heating. The heat pump’s high COP means it produces 6-10 kW of heat for every 1 kW of electricity consumed.

How quiet is it really?

In Whisper mode, the IPT16ALY produces just 20.4-33.7 dB(A) at 10 metres—quieter than a refrigerator and comparable to a whispered conversation. Even in Boost mode, it’s 9-11 dB(A) quieter than traditional on/off heat pumps. Neighbours and family members will appreciate the peaceful operation.

Can I install it myself?

While mechanically competent individuals can handle the physical installation, electrical connection must be performed by a qualified electrician to comply with UK regulations and maintain warranty validity. The unit requires a 25A MCB, proper earthing, and RCD protection. Refrigerant work requires F-Gas registered technicians.

Does it heat AND cool?

Yes! The IPT16ALY has three operating modes: Heat Only, Heat/Cool (Auto), and Cool Only. This versatility is perfect for maintaining comfortable pool temperature year-round—warming in spring/autumn and cooling during hot summer spells.

What maintenance is required?

Minimal! Clean the air inlet filter periodically (monthly during peak use), ensure water chemistry stays balanced, and have an annual professional service. Before winter, follow the winterization procedure in the manual or ensure the unit has adequate frost protection if operating year-round.

How long does initial heat-up take?

Initial heat-up time depends on pool volume, starting temperature, and ambient conditions. For a 40,000-litre pool, expect 24-48 hours to reach 28°C from ambient temperature in moderate weather. Once at temperature, the inverter maintains it efficiently with minimal energy use.

Is the warranty really 5 years?

Yes! The IPT16ALY comes with a comprehensive 5-year manufacturer’s warranty covering on-site parts and labour. Warranty validity requires proper installation, balanced water chemistry, and following maintenance guidelines. Register your unit after installation to activate coverage.

What about electricity supply requirements?

The unit requires 230V single-phase supply with a 25A Type C MCB and 30mA Type F RCD. Maximum current draw is 17A. An isolator switch must be installed within 2 metres and in line of sight of the heat pump. Voltage must remain between 207-253V while operating.

Can I control it remotely?

Absolutely! Built-in Wi-Fi connectivity (requiring your home Wi-Fi network) allows complete control via the companion smartphone app. Adjust temperature, change modes, view status, and schedule operation from anywhere with internet access. Optional wired remote control also available for indoor mounting.

Will it work with my existing pool equipment?

Yes, the IPT16ALY integrates with standard pool filtration systems. It connects via 1½” or 50mm unions and requires proper water flow (8-10 m³/h). Includes optional terminals for synchronizing with pool pump timers. Compatible with all standard pool sanitizers when water chemistry is properly maintained.

✅ Why Buy the I-PAC+ 16 from Parts4Tubs?

🏆 UK’s Trusted Pool & Hot Tub Specialists Expert advice and genuine products you can rely on.

📦 Fast, Secure Delivery Carefully packaged and shipped to protect your investment.

💬 Expert Technical Support Our knowledgeable team is here to help with any questions.

🔧 Installation Guidance Comprehensive manuals and support for a smooth setup.

✨ Quality Guaranteed Only premium brands with full manufacturer backing.

🌍 Designed for the UK Climate

The I-PAC+ 16 isn’t just imported equipment with a UK plug—it’s specifically designed by Dantherm in the United Kingdom for UK conditions. From our unpredictable weather patterns to our specific electrical standards, every aspect has been engineered with British installers and users in mind.

The extended operating range (-10°C to +43°C), R32 refrigerant selection for cold-weather performance, and compliance with UK electrical and safety regulations make this the perfect choice for reliable year-round pool and hot tub heating.

🛡️ Peace of Mind Protection

Comprehensive 5-Year Warranty

Full on-site parts and labour coverage from the manufacturer gives you complete confidence in your investment.

F-Gas Compliant

Uses low-GWP R32 refrigerant meeting all current and future F-Gas regulations.

Built to Last

Premium aluminium alloy construction and high-quality components ensure decades of reliable service.

Safety Certified

Full CE compliance and multiple built-in safety protections guard your equipment and pool.

📞 Need Help Choosing?

Not sure if the IPT16ALY is right for your pool or hot tub? Our expert team is here to help!

Get in touch for:

• Personalized sizing recommendations
• Installation planning guidance
• Technical specifications clarification
• Quotations for multiple units
• Advice on optional accessories

🚀 Transform Your Pool Experience Today

Don’t let the British weather dictate when you can enjoy your pool or hot tub. With the I-PAC+ 16 All Year Round Inverter Heat Pump, you’re investing in:

✅ Consistent, comfortable water temperatures 365 days a year ✅ Dramatically lower running costs compared to traditional heating ✅ Whisper-quiet operation that won’t disturb your peace ✅ Eco-friendly technology with minimal environmental impact ✅ Smart control from anywhere via Wi-Fi ✅ Premium quality backed by a 5-year warranty

The I-PAC+ 16: Where efficiency meets luxury, and British engineering meets year-round comfort.

📋 Quick Specification Summary

• Model: IPT16ALY
• Power Output: 16-21 kW (condition dependent)
• Operating Range: -10°C to +43°C air temperature
• Power Supply: 230V 1-Phase
• Ideal For: Pools up to 60,000L, large hot tubs
• Average COP: 10.3 at 50% speed
• Sound Level: 20.4-33.7 dB(A) at 10m
• Construction: Premium aluminium alloy
• Warranty: 5 years parts & labour
• Wi-Fi: Integrated smart control
• Refrigerant: R32 (GWP 675)

Ready to enjoy perfect pool temperatures all year round? Order your I-PAC+ 16 today and discover why thousands of UK pool owners trust Dantherm technology for their heating needs.