🌊 Astral Pool Pro Elyo Touch PET-35 – 35kW Professional Full Inverter Heat Pump for Large Pools

Your Ultimate All-Season Pool Heating Solution

Transform your swimming experience with the Astral Pool Pro Elyo Touch PET-35, a premium 35kW full inverter heat pump engineered for exceptional performance in large residential and commercial pools. Designed by AstralPool’s professional range, this cutting-edge heat pump delivers rapid heating, whisper-quiet operation, and remarkable energy efficiency – even in temperatures as extreme as -20°C.

Whether you’re looking to extend your swimming season, maintain perfect water temperatures year-round, or reduce heating costs dramatically, the PET-35 represents the pinnacle of modern pool heating technology.

💡 Why Choose the Pro Elyo Touch PET-35?

Unmatched Performance Where Others Fail

Most heat pumps struggle or stop working entirely when temperatures drop. Not the PET-35. With its advanced Full Inverter Technology, this heat pump continues delivering reliable performance in ambient temperatures from -20°C to +43°C, ensuring your pool stays comfortable throughout spring, autumn, and even winter months.

Intelligent Energy Savings

With a Coefficient of Performance (COP) reaching up to 16 in optimal conditions and 4.5-8 in real-world scenarios, the PET-35 delivers exceptional energy efficiency. This means:

• For every 1 kW of electricity consumed, you get up to 16 kW of heating power (at 28°C air/water conditions)
• Up to 33% savings compared to traditional on/off heat pumps
• Lower carbon footprint with R32 refrigerant (GWP: 675)
• Reduced running costs throughout the year

Peace and Quiet for Your Poolside Paradise

Nobody wants pool equipment that sounds like a jet engine. The PET-35 operates at just 42-60 dB(A) – quieter than normal conversation – thanks to its variable-speed DC fan and intelligent inverter compressor. Perfect for residential neighborhoods and noise-sensitive environments.

✅ Top Features & Benefits

🎯 Full Inverter Technology

Automatically adjusts compressor and fan speeds in real-time to match your pool’s exact heating demand. This results in maximum efficiency, minimal energy waste, and ultra-quiet operation.

⚡ Three Intelligent Operating Modes

1. 🚀 Boost Mode – Maximum power for rapid heating at season start or when outdoor temperatures plummet
2. 🧠 Smart Mode – Automatically balances power output between efficiency and performance for everyday use
3. 🔇 Silent Mode – Reduced noise operation for nighttime heating or residential areas (perfect for maintaining temperature overnight)

🌡️ Extreme Weather Performance

Functions reliably in ambient temperatures from -20°C to +43°C, with automatic defrosting to maintain efficiency in cold conditions. This is a true all-season solution.

📱 Smart Connectivity Ready

Optional iQBridge RS module enables remote control via the iAquaLink®+ mobile app. Monitor and adjust your pool heating from anywhere – perfect for warming the pool before you arrive home.

🏗️ Built to Last

• ABS plastic casing with injected ventilation grille
• Galvanized steel protection grid around evaporator
• Titanium heat exchanger – 100% compatible with saltwater chlorination systems
• IPX4 weather protection rating – designed for year-round outdoor installation

🎛️ Modern LED Touchscreen

Easy-to-use interface with clear temperature displays, mode selection, and system diagnostics. The intuitive controls make operation simple for everyone.

🔄 Additional Advanced Features

• Automatic defrosting
• Heating priority mode (filtration pump control)
• Programmable timer mode
• Cooling mode for summer temperature control
• High and low pressure safety switches
• Water flow switch protection
• Electronic expansion valve

📊 Complete Technical Specifications

Specification	PET-35 Value
Model	PET-35
Part Number	74173
Heating Capacity (Max-Min)	35 – 8 kW
Power Consumption (Max-Min)	5.9 – 0.5 kW
COP (28°C Air/28°C Water)	6 – 16
Heating Capacity at 15°C Air/26°C Water	25.0 – 5.5 kW
Power Consumption at 15°C Air/26°C Water	5.4 – 0.7 kW
COP at 15°C Air/26°C Water	4.5 – 8
Electrical Supply	220-240V / 1N~ / 50Hz
Rated Current	22.9A
Minimum Circuit Breaker	34A
Recommended Water Flow	13 m³/h
Water Connection	50mm
Noise Level at 1 meter	42-60 dB(A)
IP Protection Rating	IPX4 (splash-proof)
Maximum Operating Pressure	4.2 MPa
Refrigerant Type	R32 (environmentally friendly)
Refrigerant Charge	2.6 kg
Global Warming Potential (GWP)	675
CO₂ Equivalent	1.76 tonnes
Net/Gross Weight	140-158 kg
Operating Ambient Temperature Range	-20°C to +43°C
Dimensions (approx.)	Large format unit – verify clearances
Warranty	Manufacturer warranty (check with supplier)

🏊 Pool Sizing Guide – Is the PET-35 Right for You?

Recommended Pool Volumes

The PET-35 is specifically designed for large residential and commercial pools:

Pool Volume	Suitability
Up to 150 m³	✅ Excellent – rapid heating capability
150-200 m³	✅ Ideal match – balanced performance
200-250 m³	✅ Recommended range – efficient operation
250+ m³	✅ Suitable – may require longer heat-up times

💡 Pro Tip: For pools over 250m³, consider combining with solar heating or pool covers to optimize efficiency.

Pool Size Examples

• 8m × 4m × 1.5m average depth = 48m³ ✅ Excellent
• 10m × 5m × 1.5m average depth = 75m³ ✅ Excellent
• 12m × 6m × 1.5m average depth = 108m³ ✅ Ideal
• 15m × 7m × 1.8m average depth = 189m³ ✅ Recommended
• 20m × 10m × 1.5m average depth = 300m³ ✅ Suitable (use pool cover)

⏱ Estimated Heat-Up Times

Understanding how quickly your pool will heat helps with planning and expectations. Below are estimated times based on the PET-35’s 25kW output at typical UK conditions (15°C air temperature):

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

Heating Time Table

Pool Volume	10°C Rise (15→25°C)	15°C Rise (10→25°C)	20°C Rise (5→25°C)
50 m³	~23 hours	~35 hours	~46 hours
75 m³	~35 hours	~52 hours	~70 hours
100 m³	~46 hours	~70 hours	~93 hours
150 m³	~70 hours	~104 hours	~139 hours
200 m³	~93 hours	~139 hours	~185 hours
250 m³	~116 hours	~174 hours	~232 hours

⚠️ Important Disclaimers:

These are theoretical estimates calculated using the PET-35’s output at 15°C air/26°C water conditions (25kW). Actual heat-up times will vary based on:

• Ambient air temperature (colder air = slower heating)
• Wind exposure and weather conditions
• Pool insulation and heat loss
• Water flow rate and filtration schedule
• Whether a pool cover is used (highly recommended!)
• Ground temperature and pool construction type

🌟 Best Practice: Use a pool cover whenever the pool isn’t in use. This can reduce heating times by up to 50% and dramatically cut running costs.

💰 Running Cost Estimates

How Much Does It Cost to Heat Your Pool?

Based on typical UK electricity rates (approximately £0.30 per kWh in 2025):

At 15°C Air Temperature (Typical Spring/Autumn):

• Power consumption: 5.4 kW maximum
• Cost per hour: ~£1.62
• Daily cost (10 hours): ~£16.20
• Weekly cost: ~£113

At 28°C Air Temperature (Summer):

• Power consumption: 5.9 kW maximum
• Cost per hour: ~£1.77
• However, COP is higher (up to 16), so actual heating delivered is more efficient

Maintenance Mode (Once Target Temperature Reached)

Thanks to Full Inverter Technology, once your pool reaches the desired temperature, the PET-35 reduces power consumption dramatically:

• Maintenance power: 0.5-0.7 kW (variable)
• Cost per hour: ~£0.15-£0.21
• Daily maintenance cost: ~£1.50-£2.10 (much lower!)

💡 Money-Saving Tips:

1. Use a pool cover – reduces heat loss by 70-90%
2. Lower temperature by 1-2°C – significant savings with minimal comfort loss
3. Use Smart or Silent Mode – optimizes efficiency automatically
4. Run during off-peak hours if you have a time-of-use electricity tariff
5. Combine with solar heating for even greater efficiency

🔧 Installation Requirements & Clearances

Electrical Requirements

• Supply: 220-240V single-phase, 50Hz
• Circuit Breaker: Minimum 34A dedicated circuit
• Cable Size: Consult the installation manual for cable sizing based on distance
• Professional Installation: Required by qualified electrician

⚠️ Critical: All electrical work must comply with current UK wiring regulations (BS 7671) and local building codes.

Space Requirements

The PET-35 requires adequate clearance for proper airflow and maintenance:

Minimum Clearances:

• Front (air intake): 2 meters minimum
• Rear (air discharge): 2 meters minimum
• Sides: 50cm minimum each side
• Top: 1 meter minimum

Installation Location Guidelines:

• ✅ Well-ventilated outdoor area
• ✅ Level, stable surface (use anti-vibration feet provided)
• ✅ Protected from direct prevailing winds if possible
• ✅ Easy access for maintenance and filter cleaning
• ❌ NOT in enclosed spaces or garages
• ❌ NOT where discharge air recirculates to intake
• ❌ NOT directly under bedroom windows (noise consideration)

Plumbing Requirements

• Water Connection: 50mm pipe fittings (included)
• Recommended Water Flow: 13 m³/h
• Bypass Kit: Strongly recommended (sold separately) for winter drainage and flow control
• Position: Should be after the filter, before pool return

📦 What’s Included in the Box

Your PET-35 comes complete with essential accessories:

✅ 1 × Winter Cover – Protect your investment during off-season
✅ 4 × Anti-Vibration Feet – Reduce noise transmission and stabilize unit
✅ Condensate Drainage Kit – Manage moisture during operation
✅ 1 × 10m Modbus Signal Wire – For connecting to Fluidra Connect system
✅ 2 × PVC Water Connection Fittings – 50mm union fittings for installation

Optional Accessories (Sold Separately)

• iQBridge RS Module – For smartphone remote control via iAquaLink®+ app
• Bypass Kit – Essential for maintenance and winter drainage
• Extended Warranty Options – Check with your supplier

🆚 PET-35 vs. Traditional Pool Heaters

Feature	PET-35 Inverter Heat Pump	Gas Heater	Electric Heater
Energy Efficiency (COP)	4.5-16 (450-1600% efficient)	0.8-0.9 (80-90% efficient)	1.0 (100% efficient)
Running Cost	⭐⭐⭐⭐⭐ Very Low	❌ Very High	❌ High
Environmental Impact	✅ Low carbon	❌ High emissions	⚠️ Moderate
Works Below 0°C	✅ Yes (to -20°C)	✅ Yes	✅ Yes
Noise Level	🔇 42-60 dB (Quiet)	🔊 Variable (Louder)	🔇 Silent
Heating Speed	⚠️ Moderate	✅ Fast	⚠️ Slow
Upfront Cost	⚠️ Higher	⚠️ Moderate	✅ Lower
Lifespan	⭐ 10-15+ years	⚠️ 7-10 years	⚠️ 5-8 years
Maintenance	✅ Low	⚠️ Regular servicing	✅ Minimal

Verdict: While the PET-35 has a higher initial cost, it pays for itself through dramatically lower running costs – typically within 2-4 heating seasons compared to gas or electric heaters.

❓ Frequently Asked Questions

1. What size pool is the PET-35 suitable for?

The PET-35 is designed for large pools from 150-250+ m³ (approximately 150,000-250,000 liters). It’s ideal for pools roughly 10m × 8m or larger. For smaller pools, consider the PET-25, PET-19, or PET-15 models for better efficiency matching.

2. Will it work during a British winter?

Absolutely! The PET-35 operates down to -20°C ambient temperature, making it one of the most cold-weather capable heat pumps available. However, heating efficiency does reduce in colder conditions (this is normal for all heat pumps), and heat-up times will be longer. Using a pool cover is essential for winter heating.

3. How loud is it? Can I run it at night?

At 42-60 dB(A), the PET-35 is remarkably quiet – similar to a quiet library or normal conversation. The Silent Mode reduces noise further, making overnight operation perfectly viable in most residential settings. The variable-speed inverter technology means it’s only loud when working at maximum capacity.

4. Can I use it with a saltwater pool?

Yes! The PET-35 features a titanium heat exchanger specifically designed for saltwater compatibility. Titanium is highly resistant to corrosion from salt, making this heat pump perfect for saltwater chlorination systems.

5. Do I need a bypass kit?

While not included, a bypass kit is strongly recommended. It allows you to:

• Isolate the heat pump for maintenance
• Drain the unit completely in winter (essential to prevent freeze damage)
• Control water flow rate precisely
• Continue pool filtration if the heat pump needs servicing

Bypass kits are available separately from most pool equipment suppliers.

6. What’s the difference between PET-35 and PET-35T?

• PET-35: Single-phase power (220-240V) – Most common for residential UK properties
• PET-35T: Three-phase power (380-400V) – For commercial installations or properties with 3-phase supply

Both deliver the same 35kW heating capacity. Check your property’s electrical supply before ordering.

7. How long does it take to heat my pool initially?

This depends on many factors (see heat-up time table above), but as a rough guide:

• 100m³ pool, 10°C rise: ~2 days of continuous operation
• 200m³ pool, 15°C rise: ~6 days of continuous operation

Using a pool cover can reduce these times by up to 50%. Once at temperature, the heat pump only needs to run a few hours daily to maintain it.

8. What’s the difference between Boost, Smart, and Silent modes?

• 🚀 Boost Mode: Maximum power (35kW) for fastest heating – use when starting up or after cold weather
• 🧠 Smart Mode: Automatically adjusts between power and efficiency based on conditions – best for everyday use
• 🔇 Silent Mode: Runs at reduced speed for quieter operation and lower power – ideal for nighttime temperature maintenance

9. Can I control it remotely from my phone?

Yes, with the optional iQBridge RS module (sold separately). This enables full control via the iAquaLink®+ mobile app, letting you adjust temperature, change modes, and monitor performance from anywhere.

10. What’s the warranty coverage?

Warranty terms vary by supplier. Typically, AstralPool heat pumps come with a manufacturer’s warranty covering parts and labor for 2 years. Extended warranties may be available – check with your supplier at time of purchase.

11. Do I need to run it all year round?

No. Many pool owners:

• Run continuously May-September for constant swimming readiness
• Run April and October to extend the season
• Winterize November-March by draining the unit and covering

If you want year-round swimming, the PET-35 can maintain temperature through winter, but running costs will be significantly higher. A pool cover is absolutely essential for cost-effective winter heating.

12. What maintenance does it need?

The PET-35 requires minimal maintenance:

• Weekly: Visual inspection, clear any debris from air intake
• Monthly: Clean or rinse evaporator fins if dusty
• Seasonally: Check water flow and connections
• Annually: Professional service check recommended

Always ensure water chemistry is balanced to protect the titanium heat exchanger.

📄 Downloads & Documentation

Access comprehensive technical information and installation guides for your PET-35:

Installation & Service Manuals

📄 Pro Elyo Touch Complete Installation & User Manual (opens in new tab)

Comprehensive 558-page manual covering:

• Full installation instructions with diagrams
• Electrical wiring specifications and cable sizing
• Plumbing connection details
• Control panel operation and settings
• Programming and configuration
• Troubleshooting codes and solutions
• Maintenance schedules and procedures
• Technical specifications for all Pro Elyo Touch models
• Safety guidelines and precautions

Quick reference guide featuring:

• Condensed technical specifications
• Performance data charts
• Dimensions and clearance requirements
• Quick-start installation overview
• Energy efficiency ratings

🎯 Who Should Buy the PET-35?

The Astral Pool Pro Elyo Touch PET-35 is the perfect choice if you:

✅ Own a large residential pool (150m³+) or commercial pool facility
✅ Want to swim comfortably year-round or extend your season significantly
✅ Value energy efficiency and low running costs over time
✅ Need reliable heating even in cold weather (works to -20°C)
✅ Prefer quiet operation that won’t disturb neighbors
✅ Have a saltwater pool (titanium heat exchanger included)
✅ Want smart control and automation capabilities
✅ Are committed to using a pool cover to maximize efficiency

Not Quite Right for You?

If your pool is smaller than 150m³, consider these alternatives from the Pro Elyo Touch range:

• PET-25 (25.5kW) – Perfect for 120-180m³ pools
• PET-19 (19.8kW) – Ideal for 90-140m³ pools
• PET-15 (15.9kW) – Best for 70-110m³ pools
• PET-13 (13.5kW) – Suited to 60-90m³ pools

✨ Final Thoughts

The Astral Pool Pro Elyo Touch PET-35 represents the pinnacle of pool heating technology, combining professional-grade performance with residential-friendly operation. Its Full Inverter Technology ensures you get maximum efficiency, minimum noise, and reliable performance in all weather conditions.

While the initial investment is substantial, the long-term savings, extended swimming season, and enhanced pool enjoyment make the PET-35 an excellent value proposition for owners of large pools. Combined with a quality pool cover and smart operating practices, you’ll enjoy years of comfortable swimming while keeping energy costs under control.

Ready to transform your pool experience? The PET-35 delivers the perfect water temperature whenever you want it – from early spring through late autumn, and even into winter if desired.

Professional installation recommended – Contact for installation quotes and bypass kit options.

⚠️ Disclaimer: Heat-up times and running costs are estimates based on theoretical calculations and typical UK conditions. Actual performance will vary based on ambient temperature, pool insulation, water flow rates, wind exposure, and whether a pool cover is used. Always consult the installation manual and hire qualified professionals for electrical and plumbing work. Specifications subject to change by manufacturer.