V-PAC 16 Top Outlet Inverter Heat Pump 16kW – 1 Phase Extended Summer Season 🌊

Transform your hot tub or swimming pool experience with the V-PAC 16 inverter heat pump – engineered for exceptional efficiency, whisper-quiet operation, and extended seasonal performance. Designed specifically for the British climate by Dantherm UK, this 16kW powerhouse delivers consistent, reliable heating while reducing your energy costs by up to 70% compared to traditional electric heaters.

Whether you’re heating a residential hot tub, swim spa, or small pool, the V-PAC 16 combines cutting-edge inverter technology with eco-friendly R32 refrigerant to provide year-round comfort with minimal environmental impact.

🔥 Why Choose the V-PAC 16 Inverter Heat Pump?

Inverter Technology That Adapts to Your Needs Unlike traditional on/off heat pumps that cycle between full power and standby, the V-PAC 16’s intelligent inverter system continuously adjusts its output to match your exact heating requirements. This means smoother operation, reduced wear on components, and significantly lower running costs.

Whisper-Quiet Comfort Enjoy your outdoor space without disturbance. The V-PAC 16 operates 9-11 dB(A) quieter than conventional heat pumps – that’s roughly equivalent to the difference between normal conversation and a whisper. Your neighbors will thank you.

Eco-Conscious Heating Powered by R32 refrigerant with a Global Warming Potential (GWP) of just 675 (versus 2088 for older R410A systems), the V-PAC 16 is fully F-Gas compliant and represents a responsible choice for environmentally-aware pool owners.

Extended Season Performance Specially designed for UK conditions, this heat pump operates efficiently across an extended temperature range, giving you more usable months from your hot tub or pool investment.

📄 Downloads & Documentation

Product Information & Installation Guides

📄 V-PAC Inverter Heat Pump Product Leaflet (opens in new tab) Comprehensive product brochure featuring full specifications, performance data, dimensions, and the complete V-PAC range comparison. Essential reading before purchase.

📄 Installation and Maintenance Manual (opens in new tab) Complete step-by-step installation instructions, electrical wiring diagrams, commissioning procedures, maintenance schedules, and troubleshooting guide. Required for professional installers and DIY enthusiasts.

💡 Tip: Download both documents before installation to ensure you have all necessary information on-hand.

✨ Key Features & Benefits

🎯 Advanced Inverter Technology

Benefit: Reduces energy consumption by up to 70% compared to traditional electric heaters. The variable-speed compressor adjusts power output in real-time, eliminating wasteful energy spikes and delivering smooth, consistent heating.

🔇 Ultra-Quiet Whisper Mode

Benefit: At just 9-11 dB(A) quieter than standard models, you can run your heat pump day or night without disturbing your household or neighbors. Perfect for urban gardens and noise-sensitive environments.

🌍 R32 Eco-Friendly Refrigerant

Benefit: Future-proof your investment with low-GWP refrigerant that’s F-Gas compliant and reduces your carbon footprint by up to 68% compared to older refrigerants.

⚡ 16kW Heating Capacity

Benefit: Powerful enough for hot tubs up to 2,500 liters and small pools up to 30,000 liters. Delivers rapid heat-up times and maintains precise temperature control even during cooler months.

🏗️ Durable ABS Construction

Benefit: Weather-resistant housing withstands UV exposure, rain, and temperature fluctuations. Built to last for years of reliable outdoor service.

🔄 Multi-Function Operation Modes

Benefit: Switch between Heat Only, Heat/Cool, or Cool Only modes to suit seasonal requirements. Keep your water at the perfect temperature year-round.

🛡️ 5-Year Comprehensive Warranty

Benefit: Peace of mind with manufacturer-backed coverage including on-site parts and labor. Demonstrates Dantherm’s confidence in product quality and longevity.

📊 Complete Technical Specifications

Specification	Details
Model	VPT16ALX
Heating Capacity	16 kW
Technology Type	Full Inverter
Power Supply	1 Phase (230V / 50Hz)
Outlet Configuration	Top Outlet
Refrigerant Type	R32 (Low GWP – 675)
F-Gas Compliance	✅ Fully Compliant
Operation Modes	Heat Only / Heat-Cool / Cool Only
Noise Level Reduction	9-11 dB(A) quieter (Whisper Mode)
Casing Material	High-Grade ABS Plastic
Operating Range	Extended Summer Season
Design Origin	UK (Dantherm)
Warranty Coverage	5 Years (Parts & On-Site Labor)
Compliance	CE Marked, UK Building Regulations

🌡️ Performance Specifications

Parameter	Value
Coefficient of Performance (COP)	Up to 5.5 (varies with conditions)
Operating Air Temperature Range	-5°C to +43°C
Recommended Pool/Tub Volume	15,000 – 30,000 liters (pool) / Up to 2,500 liters (hot tub)
Water Flow Rate Required	4-8 m³/hour
Electrical Protection Rating	IPX4 (Splash-proof)

📐 Physical Dimensions

Dimension	Measurement
Unit Weight	Approximately 65-75 kg
Footprint	Compact design (specific dimensions in installation manual)
Clearance Required	Minimum 500mm all sides for airflow

🏊 Pool & Hot Tub Sizing Guide

Is the V-PAC 16 Right for Your Application?

✅ Ideal For:

Hot Tubs & Swim Spas:

• 4-6 person hot tubs (1,200 – 2,500 liters)
• Swim spas up to 12,000 liters
• Indoor/outdoor installations with good insulation

Swimming Pools:

• Above-ground pools: 15,000 – 25,000 liters
• Small in-ground pools: 20,000 – 30,000 liters
• Indoor pools with controlled environment

⚠️ Consider Upgrading If:

• Pool volume exceeds 30,000 liters
• Pool is poorly insulated or fully exposed
• You require rapid heating in cold climates
• Pool usage is year-round in temperatures below 5°C

💡 For larger pools or extreme conditions, explore our V-PAC 20 or V-PAC 25 models for enhanced performance.

⏱️ Estimated Heat-Up Times

Understanding Your Heating Timeline

The table below provides estimated times to heat your pool or hot tub using the V-PAC 16’s 16kW capacity. Actual times vary based on insulation, ambient temperature, wind exposure, and cover usage.

🌊 Hot Tub Heat-Up Estimates

Hot Tub Volume	Temperature Rise	Estimated Heat-Up Time
1,500 liters	15°C → 38°C (23°C rise)	2.5 – 3.5 hours
2,000 liters	15°C → 38°C (23°C rise)	3.3 – 4.5 hours
2,500 liters	15°C → 38°C (23°C rise)	4.2 – 5.5 hours

🏊 Pool Heat-Up Estimates (Extended Season)

Pool Volume	Temperature Rise	Estimated Heat-Up Time
15,000 liters	5°C rise (18°C → 23°C)	5 – 7 hours
20,000 liters	5°C rise (18°C → 23°C)	7 – 10 hours
25,000 liters	5°C rise (18°C → 23°C)	9 – 12 hours
30,000 liters	5°C rise (18°C → 23°C)	11 – 15 hours

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

⚠️ Important Disclaimers:

• These are theoretical estimates under optimal conditions
• Actual performance depends on: ambient air temperature, humidity, wind, water circulation, insulation quality, and cover usage
• Initial heat-up takes longer; maintenance heating is much more efficient
• Using a quality pool cover can reduce heating time by 40-60%
• For precise heat-up planning, consult the installation manual or contact our technical team

💰 Running Cost Analysis

How Much Does It Cost to Operate?

The V-PAC 16’s inverter technology delivers exceptional efficiency, but actual costs depend on your electricity rate, usage patterns, and ambient conditions.

Typical Operating Costs (UK Average)

Based on UK electricity rates of £0.24 per kWh (2024 average):

Usage Scenario	Daily Runtime	Estimated Daily Cost	Monthly Cost
Hot Tub (Summer)	2-4 hours	£1.15 – £2.30	£35 – £70
Hot Tub (Spring/Autumn)	4-6 hours	£2.30 – £3.45	£70 – £105
Pool Heating (Summer)	6-8 hours	£3.45 – £4.60	£105 – £140

💡 Cost-Saving Tips:

• Use a thermal cover when pool/tub not in use (saves 40-60% on heating)
• Run heat pump during off-peak electricity hours if on a time-of-use tariff
• Maintain water chemistry to prevent scaling (maintains efficiency)
• Set target temperature 1-2°C lower (saves approximately 10-15% per degree)
• Ensure good insulation and windbreaks around outdoor installations

🆚 Comparison vs. Traditional Heating:

Heating Method	Cost to Heat 20,000L Pool by 5°C
V-PAC 16 Heat Pump	£3.50 – £5.00
Electric Immersion Heater (3kW)	£18 – £22
Gas Boiler	£8 – £12

The V-PAC 16 can save you up to 70% compared to traditional electric heating.

🔧 Installation Requirements

Site Preparation Checklist

✅ Location Requirements:

• Level, stable surface (concrete pad recommended)
• Minimum 500mm clearance on all sides for airflow
• Protected from direct weather exposure (optional canopy)
• Within 10 meters of pool equipment (shorter pipe runs = better efficiency)
• Away from bedroom windows to minimize any noise impact

✅ Electrical Requirements:

• Dedicated 230V single-phase circuit with RCD protection
• Circuit breaker sized per installation manual specifications
• Installed by qualified electrician in compliance with UK wiring regulations (BS 7671)
• Earth bonding to pool/tub equipment

✅ Plumbing Connections:

• Compatible with 50mm pipe connections (adapters available)
• Bypass valve installation recommended for maintenance
• Pressure gauge and flow meter for system monitoring
• Non-return valve to prevent backflow

✅ Professional Installation Recommended: While experienced DIYers can install heat pumps, we strongly recommend professional installation to ensure:

• Correct refrigerant charge and system pressure
• Proper electrical safety and compliance
• Optimal placement for efficiency and longevity
• Valid warranty coverage

📞 Need an installer? Contact us for recommended local professionals.

❓ Frequently Asked Questions

1. How efficient is the V-PAC 16 compared to traditional heating?

The V-PAC 16 delivers a Coefficient of Performance (COP) of up to 5.5, meaning for every 1kW of electricity consumed, it generates 5.5kW of heat. This makes it approximately 5-7 times more efficient than direct electric heating and 70% cheaper to run than traditional immersion heaters.

2. Can I use this heat pump year-round in the UK?

The V-PAC 16 is designed for “extended summer season” use, operating efficiently in ambient temperatures from -5°C to +43°C. For most UK regions, this means reliable operation from March through November. Winter use (December-February) is possible but efficiency decreases in sub-zero temperatures. For year-round heating, consider pairing with a supplementary heat source or upgrading to our all-season models.

3. How loud is the V-PAC 16 during operation?

With Whisper Mode activated, the V-PAC 16 operates 9-11 dB(A) quieter than standard heat pumps – roughly equivalent to a quiet conversation at 3 meters distance. Most users find it unobtrusive, especially when positioned away from windows and outdoor seating areas.

4. What’s the difference between the V-PAC and I-PAC ranges?

Both use inverter technology and R32 refrigerant. The key differences:

• V-PAC: ABS plastic casing, no Wi-Fi connectivity, more budget-friendly
• I-PAC: Aluminum alloy casing, built-in Wi-Fi for smartphone control, premium durability

Performance and efficiency are comparable; choose based on budget and desire for smart controls.

5. Do I need to drain or winterize the heat pump?

Yes, if you’re shutting down for winter. Follow the winterization procedure in the installation manual, which includes draining water from the heat exchanger to prevent freeze damage. We also recommend using the optional winter protection cover. If keeping the system running through mild winters, ensure water circulation continues to prevent freezing.

6. Can I install this myself or do I need a professional?

While the V-PAC 16 can be installed by competent DIYers with plumbing and electrical experience, we strongly recommend professional installation for several reasons:

• Ensures compliance with UK Building Regulations and electrical safety standards
• Proper refrigerant system setup (pre-charged but requires verification)
• Validates warranty coverage
• Optimizes system performance and longevity

Electrical work must be completed by a qualified electrician to meet Part P regulations.

7. What size pool or hot tub is this suitable for?

Hot Tubs: Ideal for 4-6 person tubs (1,200 – 2,500 liters) Swim Spas: Up to 12,000 liters Pools: 15,000 – 30,000 liters

For larger volumes, consider the V-PAC 20 or V-PAC 25 models. Undersizing a heat pump leads to longer heat-up times and excessive runtime.

8. What maintenance does the V-PAC 16 require?

Minimal maintenance required:

• Monthly: Clean air intake filters (rinse with hose)
• Quarterly: Inspect for debris accumulation around unit
• Annually: Professional service including refrigerant pressure check, electrical connection inspection, and heat exchanger cleaning
• Seasonally: Winterization if shutting down during cold months

Proper maintenance ensures optimal performance and extends lifespan beyond the 5-year warranty period.

9. Does this heat pump also cool water?

Yes! The V-PAC 16 features multi-function operation modes including:

• Heat Only: For pool/tub heating
• Cool Only: To reduce water temperature during hot summer months
• Heat/Cool: Automatic switching to maintain target temperature

This is particularly useful for swim spas and pools in conservatories where water can overheat.

10. What’s included in the 5-year warranty?

Dantherm provides comprehensive coverage including:

• Parts replacement for manufacturing defects
• On-site labor for warranty repairs (UK mainland)
• Heat exchanger and compressor coverage
• Customer support throughout warranty period

Warranty exclusions: Damage from improper installation, lack of maintenance, freezing, electrical surges, or unauthorized modifications. Register your product within 30 days of installation to activate warranty.

11. How long does installation typically take?

A professional installer can typically complete installation in 4-8 hours, depending on:

• Site preparation requirements (electrical/plumbing already in place)
• Distance from pool equipment
• Complexity of plumbing integration
• Electrical work required

DIY installations may take 1-2 days for those with experience.

12. Can I control the heat pump remotely?

The V-PAC range does not include Wi-Fi connectivity. For remote control via smartphone app, consider the I-PAC range with built-in Wi-Fi. Alternatively, you can add a third-party smart plug with temperature monitoring for basic remote on/off control (not recommended for precise temperature management).

🛡️ Warranty & Support

5-Year Manufacturer’s Warranty

Your V-PAC 16 is backed by Dantherm’s comprehensive 5-year warranty covering:

• ✅ All manufacturing defects
• ✅ Parts replacement
• ✅ On-site labor (UK mainland)
• ✅ Compressor and heat exchanger
• ✅ Technical support

To Activate Your Warranty:

1. Register your heat pump within 30 days of installation
2. Retain proof of purchase and installation date
3. Ensure installation complies with manufacturer guidelines
4. Follow recommended maintenance schedule

Extended Support Available: Contact our technical team for installation advice, troubleshooting, or parts inquiries. We’re here to ensure your heat pump performs flawlessly for years to come.

🌟 Why Buy from Parts4Tubs?

✅ Authorized Dantherm Dealer – Genuine products, full warranty support ✅ Expert Guidance – Specialists in hot tub and pool equipment ✅ Competitive Pricing – Best value on premium heat pumps ✅ Fast UK Delivery – Quick dispatch from our warehouse ✅ After-Sales Support – Technical assistance when you need it

📦 What’s Included

• V-PAC 16 heat pump unit (pre-charged with R32 refrigerant)
• User manual and installation guide
• Mounting feet and hardware
• 5-year manufacturer’s warranty registration

Not Included (Available Separately):

• Plumbing connections and fittings
• Electrical cabling and circuit protection
• Installation labor
• Remote control panel (optional accessory)
• Winter protection cover (optional accessory)

🚀 Ready to Upgrade Your Pool or Hot Tub Heating?

The V-PAC 16 represents the perfect balance of performance, efficiency, and value for medium-sized hot tubs and small pools. With its intelligent inverter technology, eco-friendly operation, and whisper-quiet performance, you’ll enjoy comfortable water temperatures while reducing energy costs and environmental impact.