Comfortline Inverter Heat Pump 12.8 kW – Wifi
£1,795.00 Inc VAT
Comfortline Inverter Heat Pump 12.8 kW – WiFi Enabled | Ultra-Efficient Pool & Hot Tub Heating 🌊
Transform your swimming pool or hot tub experience with Britain’s most energy-efficient heating solution. The Comfortline Inverter 12.8kW heat pump delivers exceptional performance with up to 66% lower running costs compared to traditional electric heaters, while maintaining whisper-quiet operation that won’t disturb your neighbours.
Featuring advanced DC inverter technology and WiFi smartphone control, this premium heat pump intelligently adjusts from 20% to 100% capacity to match your exact heating needs – maximising efficiency while minimising energy consumption.
✅ WiFi Enabled as Standard – Control from anywhere
✅ COP up to 11.6 – Every 1kW of electricity produces up to 11.6kW of heat
✅ 7dB Quieter – Ultra-silent Silence Mode for night-time operation
✅ 0°C to 43°C Operating Range – Auto-defrost for year-round use
✅ 30% Larger Heat Exchanger – Faster heating, superior efficiency
✅ Salt Water Safe – Compatible with salt systems up to 3.5%
Ideal for pools 30-50m³ and perfect for DIY hot tub installations.
Technical Specifications 📋
AMIR13 Model – 12.8 kW Performance Data
| Specification | Details |
|---|---|
| Model Code | AMIR13 |
| Advised Pool Volume | 30-50 m³ (6,600-11,000 gallons) |
| Operating Air Temperature | 0°C to 43°C (32°F to 109°F) |
| WiFi Control | ✅ Included as standard |
| Refrigerant | R32 (ECO-friendly, low GWP) |
| Power Supply | 230V / 1 Phase / 50Hz |
| Water Connections | 50mm (1.5″) female plain socket |
| Dimensions (L×W×H) | 864 × 359 × 648 mm |
| Net Weight | 49 kg |
| Salt Water Compatible | Up to 3.5% salinity (35g/L) |
Performance at Optimal Conditions
Air 26°C / Water 26°C / Humidity 80%
| Metric | Value |
|---|---|
| Heating Capacity | 12.5 kW |
| COP (Coefficient of Performance) | 11.6 (at 20% capacity) |
| Average COP | 10.1 (at 50% capacity) |
| COP at Full Load | 7.0 (at 100% capacity) |
| Power Consumption | 0.47 – 1.78 kW |
| Current Draw | 2.02 – 7.74 A |
Performance at Standard UK Conditions
Air 15°C / Water 26°C / Humidity 70%
| Metric | Value |
|---|---|
| Heating Capacity | 8.5 kW |
| COP | 6.3 (at 20% capacity) |
| Average COP | 6.1 (at 50% capacity) |
| COP at Full Load | 4.8 (at 100% capacity) |
| Recommended Water Flow | 4-6 m³/h |
Noise Levels 🔇
| Operating Mode | Sound Level |
|---|---|
| Smart Mode (Full Capacity) | 42.9 – 53.0 dB(A) at 1m |
| Silence Mode (50% Capacity) | 48.5 dB(A) at 1m |
| Sound at 10m Distance | 22.9 – 33.0 dB(A) |
💡 For comparison: Silence Mode is 7dB(A) quieter than a standard heat pump – equivalent to the sound of falling leaves or a whisper!
📄 Downloads & Documentation
Access complete technical information, installation guides, and product specifications:
📄 Comfortline Inverter Installation & Operation Manual (opens in new tab)
Complete guide covering installation requirements, electrical wiring diagrams, operation instructions, troubleshooting procedures, warranty information, and full technical specifications for all AMIR models.
📄 Comfortline Inverter Product Brochure (opens in new tab)
Performance comparisons, energy efficiency data, COP charts, noise level specifications, and environmental benefits of R32 refrigerant technology.
Why Choose the Comfortline Inverter? 💡
Proven Performance from Real Users
“I chose the Comfortline Heat Pump for my own DIY Hot Tub, and the cost savings have been huge – 66% cheaper on running costs and 8x faster heat-up times versus my old 3KW electric heater.” – Owner’s Experience
This isn’t just another heat pump. It’s the model our experts personally use and recommend to customers because it simply works brilliantly.
Intelligent Inverter Technology
Unlike traditional on/off heat pumps that constantly cycle between full power and complete shutdown, the Comfortline uses smart DC inverter technology to:
🔹 Fast Heat When You Need It – Runs at 100% capacity for rapid temperature rise at season start
🔹 Efficient Maintenance Mode – Drops to low-speed operation (20-80%) to maintain temperature with maximum COP
🔹 Continuous Optimization – Automatically adjusts capacity based on ambient conditions and heating demand
The Result? Average COP of 9.0 in optimal conditions (Air 26°C / Water 26°C / Humidity 80%), compared to just 5.0 for standard on/off heat pumps.
Key Features & Benefits ✨
🔥 30% More Efficient Heat Exchanger
The Comfortline features a spiral titanium heat exchanger with 30% greater surface area than standard tube-in-tube designs. This means:
- Faster heat transfer – Get to temperature quicker
- Superior corrosion resistance – Titanium won’t degrade in harsh conditions
- Salt water compatible – Use with chlorine, bromine, or salt systems
- Longer lifespan – 5-year warranty on heat exchanger
⚡ HP Booster Technology
Proprietary HP-BOOSTER technology delivers an additional 20% efficiency boost compared to standard market heat pumps, ensuring you get maximum heat output for minimum running cost.
🌡️ Precise Temperature Control
- Digital thermostat with 0.1°C accuracy
- Temperature range: 18°C to 40°C (64°F to 104°F)
- Real-time display of inlet water temperature
- WiFi app control for remote monitoring and adjustment
🔇 Two Operating Modes
Smart Mode (Standard):
- 20% to 100% capacity range
- Intelligent optimization for fastest heating
- Ideal for initial heat-up and cold weather
Silence Mode (Night Operation):
- 20% to 80% capacity range
- 3dB(A) quieter than Smart Mode
- Perfect for overnight running in residential areas
- Maintains temperature with minimal noise
❄️ Auto-Defrost Function
Intelligent defrost system operates down to 0°C ambient temperature:
- Automatic defrost cycle when needed
- Manual defrost option available
- Ensures consistent performance in British weather
- No loss of heating during defrost mode
🛡️ Comprehensive Protection Systems
Built-in safety features protect your investment:
✅ High/Low pressure protection
✅ Water flow protection
✅ Anti-freeze protection
✅ Compressor overload protection
✅ High exhaust temperature protection
✅ Phase sequence protection
✅ Thermal overload protection
🌍 Eco-Friendly R32 Refrigerant
Uses R32 refrigerant with 675 GWP (Global Warming Potential) – dramatically lower than older refrigerants:
- R-410A: 2,088 GWP (3x higher)
- R-22: 1,810 GWP (2.7x higher)
- R-32: 675 GWP ✅ Modern, efficient, environmentally responsible
Real-World Heating Performance ⏱️
Estimated Heat-Up Times for Various Pool Volumes
The table below shows estimated times to raise water temperature using the Comfortline 12.8kW heat pump. Calculations use the formula:
Time (hours) = (Volume in m³ × Temperature Rise °C × 1.16) ÷ 8.5 kW
(Using 8.5 kW output at typical UK conditions: Air 15°C, Water 26°C, Humidity 70%)
| Pool Volume | Temperature Rise | Estimated Heat-Up Time |
|---|---|---|
| 30 m³ (6,600 gallons) | 5°C (9°F) | 20 hours |
| 30 m³ (6,600 gallons) | 10°C (18°F) | 41 hours |
| 40 m³ (8,800 gallons) | 5°C (9°F) | 27 hours |
| 40 m³ (8,800 gallons) | 10°C (18°F) | 54 hours |
| 50 m³ (11,000 gallons) | 5°C (9°F) | 34 hours |
| 50 m³ (11,000 gallons) | 10°C (18°F) | 68 hours |
⚠️ Important Notes on Heat-Up Estimates:
- These are theoretical calculations under ideal conditions
- Actual times will vary based on ambient air temperature, humidity, wind, pool insulation, and whether a pool cover is used
- Warmer air = faster heating – Performance improves significantly in summer
- Colder air = slower heating – Expect longer times in spring/autumn
- Always use a pool cover when not in use to retain heat and reduce heating time by 50-70%
- Run filtration pump for at least 15 hours daily during heat-up phase
Hot Tub Heating Example
For a typical 1,500-litre (1.5 m³) hot tub:
- 5°C rise: Approximately 1 hour
- 10°C rise: Approximately 2 hours
- 15°C rise: Approximately 3 hours
This is why the owner saw 8x faster heat-up compared to a 3kW electric heater!
Running Cost Comparison 💰
Annual Energy Costs: Comfortline vs. Traditional Heating
Based on typical UK pool (40m³) running 180 days per season:
| Heating Method | Average Daily kWh | Days per Season | Total kWh | Cost @ £0.24/kWh | Annual Cost |
|---|---|---|---|---|---|
| 3kW Electric Heater | 24 kWh | 180 days | 4,320 kWh | £1,036.80 | £1,037 |
| Standard On/Off Heat Pump (COP 5) | 9.6 kWh | 180 days | 1,728 kWh | £414.72 | £415 |
| Comfortline Inverter (COP 9) | 5.3 kWh | 180 days | 954 kWh | £228.96 | £229 |
💡 Your Savings:
- vs. Electric Heater: Save £808 per year (78% reduction)
- vs. Standard Heat Pump: Save £186 per year (45% reduction)
- Payback period: Typically 2-3 seasons depending on usage
Based on average electricity rate of £0.24/kWh. Your actual costs will vary based on your tariff, usage patterns, and local climate.
Installation Requirements 🔧
Space & Clearance
Minimum clearances required:
- Front (air discharge): 200cm minimum
- Rear (air intake): 50cm minimum
- Sides: 30cm minimum each side
- Top: Unrestricted airflow
Electrical Requirements
| Component | Specification |
|---|---|
| Power Supply | 230V / 1 Phase / 50Hz |
| Breaker Rating | 15.0 A |
| RCD (Residual Current Device) | 30 mA |
| Fuse | 15.0 A |
| Power Cable | 3 × 2.5 mm² |
| Signal Cable | 3 × 0.5 mm² (can extend to 50m) |
⚠️ Professional Installation Required:
- Must be hardwired (no plug allowed in UK/Europe)
- Must be installed by qualified electrician
- Unit must be properly earthed
- Installation must comply with local electrical codes
Plumbing Requirements
- Water connections: 50mm (1.5″) unions included
- Recommended water flow: 4-6 m³/h (880-1,320 gallons/hour)
- Maximum pipe run: 10m between pool/hot tub and heat pump
- Bypass valve: Recommended for optimal flow control
- Non-return valve: Required to prevent back-flow
- Unions with isolating valves: Recommended for easy servicing
💡 Pro Tip: Use hard pipe connections near the unit (not flexible hose) as the unions cannot support the weight of water-filled hose.
Foundation & Mounting
- Base required: Solid concrete pad or anti-vibration platform
- Mounting: M10 bolts to secure frame
- Condensate drainage: Connect drain hose (included) for continuous water discharge
- Ventilation: Must be in open air with good airflow – NOT in enclosed spaces
Manufacturer’s Warranty 🛡️
Parts-only warranty after initial 12 months:
| Component | Warranty Period |
|---|---|
| Titanium Heat Exchanger | 5 Years |
| GMMC Compressor | 2 Years |
| All Other Parts | 2 Years |
| Steel Casing | 2 Years |
⚠️ Warranty covers manufacturing defects only. Installation, labour, and site visit costs are not included after the first 12 months.
What’s Included in the Box? 📦
✅ Comfortline Inverter Heat Pump AMIR13 unit
✅ 50mm (1.5″) water connection unions
✅ Condensate drain hose and clip
✅ User manual (English)
✅ Installation guide
✅ WiFi connectivity module (pre-installed)
Frequently Asked Questions ❓
1. What size pool or hot tub is this suitable for?
The 12.8kW Comfortline is ideal for pools 30-50m³ (6,600-11,000 gallons). For hot tubs, it’s perfect for volumes from 1,000 to 2,500 litres. Smaller or larger pools? We have AMIR07 (7kW) through AMIR24 (24kW) models available.
2. Will it work in winter / all year round?
Yes, the unit operates in ambient temperatures from 0°C to 43°C with auto-defrost functionality. However, efficiency reduces as air temperature drops. It’s most efficient in temperatures above 15°C. Many users run their pools/hot tubs year-round, but expect higher running costs in winter months.
3. How much does it cost to run?
Running costs depend on your pool volume, target temperature, ambient conditions, and usage pattern. For a typical 40m³ pool in the UK summer, expect around £2-4 per day at current electricity prices, compared to £10+ per day for a traditional 3kW electric heater. See the Running Cost Comparison section above for detailed estimates.
4. How loud is it? Will it disturb neighbours?
At 1 meter distance in Silence Mode, the unit operates at approximately 48.5 dB(A) – equivalent to a quiet conversation or light rainfall. At 10 meters (typical garden distance), this drops to just 22-33 dB(A), which is quieter than a whisper. Run Silence Mode overnight to maintain temperature with minimal noise.
5. Do I need a professional to install it?
Yes, absolutely. Electrical installation must be completed by a qualified electrician, and plumbing work requires understanding of water flow rates, bypass valves, and proper pipe sizing. Incorrect installation can damage the unit, void warranty, and may be dangerous. We strongly recommend professional installation.
6. Can I control it from my phone?
Yes! This model includes WiFi as standard. Download the compatible app to monitor and adjust temperature, switch between Smart and Silence modes, and check system status from anywhere with internet connection.
7. Is it compatible with salt water systems?
Yes, the titanium heat exchanger is safe for salt concentrations up to 3.5% (35g per litre) – suitable for most residential salt chlorinator systems. It’s also compatible with traditional chlorine, bromine, and other sanitizers.
8. How long will it take to heat my pool?
This depends on pool volume, current temperature, target temperature, and weather conditions. See the “Real-World Heating Performance” section above for detailed estimates. As a rough guide, expect 20-40 hours for a 30-50m³ pool to gain 5-10°C under typical UK spring/autumn conditions. Always use a pool cover to dramatically reduce heat-up time.
9. What’s the difference between this and a standard heat pump?
Inverter technology is the key difference. Standard on/off heat pumps run at 100% or 0% – they’re either full-power or completely off. The Comfortline modulates from 20-100% capacity to match demand, resulting in:
- Higher average COP (9.0 vs 5.0)
- Lower running costs (up to 45% cheaper)
- Quieter operation (7dB lower)
- Longer compressor lifespan
- More stable water temperature
10. What maintenance is required?
Regular maintenance:
- Keep air inlet/outlet clear of debris, leaves, and obstructions
- Check and clean air filter monthly during heavy use
- Inspect electrical connections annually
- Drain unit completely if not used during freezing weather
Annual professional service recommended:
- Refrigerant pressure check
- Electrical safety inspection
- Water flow verification
- General operational check
11. What happens if it breaks down?
Contact your installer or our support team. The unit has comprehensive error code diagnostics displayed on the control panel (E1-F9 codes cover all major fault conditions). Common issues are covered in the troubleshooting section of the manual. For warranty claims on parts, contact the retailer with your proof of purchase and model number.
12. Can I install it myself to save money?
While physically possible for experienced DIYers, we strongly advise against it. Reasons:
- Electrical work must be certified by qualified electrician (UK regulations)
- Incorrect refrigerant handling voids warranty and may be illegal
- Improper water flow can damage the titanium heat exchanger
- Risk of electric shock if not properly earthed
- Warranty may be voided if not professionally installed
- Gas Safe registration may be required in some regions
Save yourself the risk and expense of mistakes – use a qualified installer.
Why Buy from Parts4Tubs? 🏆
✅ UK & Europe Stock – Fast delivery, no long waits
✅ Expert Support – Owner-tested, team-recommended product
✅ Installation Accessories – Everything you need in one place
✅ Competitive Pricing – Best value for premium performance
✅ Real Experience – We use what we sell
Technical Summary & Suitability Guide 📊
Best For:
✅ Swimming pools 30-50m³ (6,600-11,000 gallons)
✅ Large hot tubs (1,500-2,500 litres)
✅ DIY hot tub builds
✅ Pool season extension (April-October)
✅ Year-round use in mild climates
✅ Noise-sensitive residential areas
✅ Energy-conscious pool owners
✅ Salt water pool systems
Not Suitable For:
❌ Very small pools under 20m³ (oversized, consider AMIR07 or AMIR09)
❌ Commercial pools requiring rapid heat-up
❌ Locations with frequent sub-zero temperatures and no pool cover
❌ Indoor installation (requires outdoor placement)
❌ Areas with restricted electrical capacity (needs 15A dedicated circuit)
Order Your Comfortline Inverter Today 🛒
Transform your pool or hot tub experience with intelligent, efficient heating that pays for itself season after season.
📞 Questions? Contact our expert team for sizing advice and installation support.
⚡ Need installation supplies? Check out our Air Source Connection Kits with bypass valves, pipe, and fittings.
💡 Pro Tip: Order a thermal pool cover at the same time – it’ll reduce your heat-up time by up to 70% and slash your running costs even further!
 | 2-inch Flapper Check Valve: The Heart of Your Hot Tub’s Circulation As a dedicated hot tub enthusiast and spare parts supplier, I’m excited to introduce you to a crucial component that keeps your spa running smoothly: the 2-inch Flapper Check Valve with a 1.25-2lbs Spring. This small but mighty piece of equipment plays a vital [...] | |
 | The Air Source Connection Kit from Buildahottub.com is everything you need to connect your new air source heat pump to your existing hot tub. The difference in the two sizes is the amount of pipe that is supplied and also the number of elbows and couplers. This kit includes 1 x 1.5″ Bypass Valve setup [...] | |
| The Air Source Connection Kit from Buildahottub.com is everything you need to connect your new air source heat pump to your existing hot tub. The difference in the two sizes is the amount of pipe that is supplied and also the number of elbows and couplers. This kit includes 1 x 1.5″ Bypass Valve setup [...] | |
| The Air Source Connection Kit from Buildahottub.com is everything you need to connect your new air source heat pump to your existing hot tub. The difference in the two sizes is the amount of pipe that is supplied and also the number of elbows and couplers. This kit includes 1 x 1.5″ Bypass Valve setup [...] | |
| The Air Source Connection Kit from Buildahottub.com is everything you need to connect your new air source heat pump to your existing hot tub. The difference in the three sizes is the amount of Pipe that is supplied and also the number of elbows and couplers. This kit includes 1 x 1.5″ Air Source Bypass [...] | |
| The Air Source Connection Kit from Buildahottub.com is everything you need to connect your new air source heat pump to your existing hot tub. The difference in the three sizes is the amount of Pipe that is supplied and also the number of elbows and couplers. This kit includes 1 x 1.5″ Air Source Bypass [...] | |
| The Air Source Connection Kit from Buildahottub.com is everything you need to connect your new air source heat pump to your existing hot tub. The difference in the three sizes is the amount of Pipe that is supplied and also the number of elbows and couplers. This kit includes 1 x 1.5″ Air Source Bypass [...] | |
| The Air Source Connection Kit from Buildahottub.com is everything you need to connect your new air source heat pump to your existing hot tub. The difference in the three sizes is the amount of Pipe that is supplied and also the number of elbows and couplers. This kit includes 1 x 1.5″ Air Source Bypass [...] |
Related products
Comfortline Inverter Heat Pump
Air Source Heat Pumps
Air Source Heat Pumps
Comfortline Inverter Heat Pump
Air Source Heat Pumps
Accessories
Air Source Heat Pumps
Air Source Heat Pumps
Air Source Connection Kit – Regular (2″) with Flapper Valve (for single pump system)