High-Output Inverter Heat Pump for Larger Pools
The Flotide Inverter 21 is a serious bit of kit for larger residential and light commercial pools. Built for pools between 50-95m³, it delivers up to 18.4kW of heating capacity with full inverter modulation and a peak COP of 10.0 - so you get powerful heat-up performance and outstanding running-cost efficiency once your pool is up to temperature.
🏷️ Energy Rating: A | 📡 Wi-Fi Module Included | FREE DELIVERY across the UK on all orders.
⚡ Important: Hardwired Installation Required
Unlike our smaller plug-and-play models, the Inverter 21 draws up to 15.72A and needs a dedicated electrical supply with a 20A or 32A circuit breaker, fitted by a qualified electrician. Plan for the electrical install at the same time as the pipework.
🏊 Perfect For
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Pool Size: 50-95 cubic metres (large residential and light commercial pools)
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Pool Dimensions: Typically 10m x 5m up to 14m x 6m pools
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Water Volume: 50,000 - 95,000 litres
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Applications: Domestic swimming pools, holiday lets, small hotels and wellness centres, chlorine or saltwater systems
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Note: Maximum pool volume depends on environmental conditions and desired temperature
✨ Key Features & Benefits
Smart Inverter Technology
The full inverter compressor automatically adjusts heating capacity to suit weather conditions. Modulating output from 4.38kW up to 18.4kW means rapid heat-up when you need it and gentle, efficient operation once your target temperature is reached - cutting running costs by up to 30% compared to non-inverter models.
"All Seasons" Operation
Works in ambient temperatures down to -7°C, so you can extend your swimming season well into autumn and start earlier in spring. Automatic defrost keeps the unit running efficiently even in cold snaps.
Automatic Heating & Cooling
Not just a heater - the Inverter 21 can also cool your pool water in the height of summer. Automatic mode maintains your target temperature year-round without manual intervention.
Eco-Friendly R32 Refrigerant
Uses R32 refrigerant, which has a Global Warming Potential (GWP) 3x lower than older R410A gas. Powerful heating performance while doing your bit for the environment.
Outstanding Energy Efficiency
With a COP (Coefficient of Performance) of up to 10.0 at optimal conditions, the Inverter 21 delivers up to £10.00 worth of heat for every £1 of electricity consumed. Even in cooler UK weather (15°C air temperature), it maintains an impressive COP of 6.1.
Titanium Heat Exchanger
The PVC-titanium heat exchanger is built to last, offering superior corrosion resistance for both chlorine and salt chlorinated pools. Reliable, worry-free operation for years to come.
Quiet Operation
Low noise rotary Gree compressor combined with a variable speed fan motor keeps noise levels manageable - 53 dB(A) at full output, dropping to 33 dB(A) in silent mode.
Wi-Fi Control Included
Wi-Fi module supplied as standard - monitor and adjust your pool temperature from anywhere using your smartphone. Glass touch display on the unit for direct control.
SmartGrid Technology
Built-in SmartGrid input lets external signals influence electricity usage - useful for solar PV systems where you can prioritise running the heat pump when self-generated electricity is available.
Durable ABS Cabinet
Robust black ABS plastic cabinet resists UV damage, corrosion and weathering - built to withstand the British climate year after year.
📊 Full Technical Specifications
| Model |
Flotide Inver 21/32 |
| Energy Label |
A |
| Recommended Pool Volume |
50-95 cubic metres |
| Heating Capacity (A27°C/W27°C) |
18.4 ~ 4.38 kW |
| Heating Capacity (A15°C/W25°C) |
13.8 ~ 2.4 kW |
| COP (A27°C/W27°C) |
10.0 ~ 5.8 |
| COP (A15°C/W25°C) |
6.1 ~ 4.5 |
| Motor Power Input |
0.67 ~ 3.607 kW |
| Rated Current |
15.72 A |
| Recommended Flow Rate |
7.5 m³/h |
| Power Supply |
230VAC / 50Hz / Single Phase (hardwired, 20-32A breaker) |
| Refrigerant Type |
R32 (eco-friendly, low GWP) |
| Compressor |
Gree rotary, variable speed |
| Heat Exchanger Material |
Titanium (corrosion resistant) |
| Cabinet Material |
ABS, black (UV & weather resistant) |
| Control Panel |
Glass touch display |
| Wi-Fi |
Included (module supplied as standard) |
| SmartGrid |
Yes |
| Noise Level |
53 dB(A) full output / 33 dB(A) silent mode |
| Pipe Connections |
50mm (2") |
| Net Weight |
60 kg |
| Dimensions (L x W x H) |
1048 x 450 x 770 mm |
| Water Temperature Range |
9°C to 40°C |
| Operating Ambient Range |
-7°C to 43°C |
💰 Estimated Running Costs
Based on average UK electricity rates (£0.25/kWh) and typical usage:
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Daily running cost (8 hours): Approximately £3.00 - £6.00 depending on ambient temperature and target pool temperature
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Monthly cost (April - September): Approximately £90 - £180
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Annual savings vs electric heater: Up to £1,200 - £1,800
Note: Actual costs will vary based on your pool size, desired temperature, ambient conditions, and energy tariff. Using a pool cover can reduce running costs by up to 50%.
📦 What's in the Box
- 1 x Flotide Inver 21/32 Full Inverter Heat Pump (60 kg)
- 1 x Wi-Fi module
- 1 x Winter cover
- Installation manual (English)
- Electrical connection guide
- Technical specifications datasheet
- Warranty documentation
🔧 Installation Notes
Professional installation required. This is a hardwired unit and must be installed by a qualified electrician and pool technician. Key requirements:
- Dedicated 230V electrical supply with 20A or 32A circuit breaker and RCD protection
- Outdoor installation with minimum 500mm clearance on all sides for adequate airflow
- Level, vibration-free base (concrete pad recommended)
- Connection to pool filtration system via 50mm (2") pipework
- Bypass valve installation recommended for optimal flow control
- Position away from bedroom windows to minimise any noise disturbance
🛡️ Warranty Information
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2-year warranty on the heat pump unit (parts and labour for manufacturing defects)
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5-year warranty on compressor and heat exchanger
Warranty is subject to correct installation by a qualified professional and proper maintenance according to manufacturer guidelines. Extended warranty options may be available - please contact us for details.
🚚 Delivery & Returns
FREE DELIVERY to mainland UK addresses. Most orders are dispatched within 3-5 working days. This item is eligible for our 14-day returns policy (conditions apply - unit must be unopened and unused).
🌟 Why Choose 123 Pools?
- ✅ FREE DELIVERY across the UK
- ✅ Expert technical support from qualified pool engineers
- ✅ Genuine manufacturer warranties
- ✅ Competitive pricing
- ✅ Fast dispatch
Ready to heat your large pool the smart way? Order your Flotide Inverter 21 today and enjoy efficient, reliable heating for the whole season.
Questions? Our expert team is here to help - call us or use the live chat.