Engineered for Silence. Designed for Efficiency. Built for Australian Pools.
Experience next-level pool and spa heating with the AquaSolis AQS+ Back Discharge 21kW Inverter Ultra-Quiet Heat Pump – engineered for outstanding performance, whisper-quiet operation, and maximum energy efficiency. Designed specifically for Australian and New Zealand conditions, this premium heat pump features patented InverPad Technology, combining advanced inverter control, streamlined airflow, and noise-cancelling design to deliver ultra-silent operation without sacrificing performance.
Its unique airflow system draws air from the sides and discharges it through the back, minimising disturbance – ideal for compact spaces or installations near living areas.
Powered by advanced inverter technology and a Mitsubishi twin-rotary compressor, the AquaSolis delivers a COP of up to 16 – dramatically reducing energy use while keeping your pool at a consistent, comfortable temperature.
Built tough for Aussie conditions, the AquaSolis features a twisted titanium heat exchanger backed by a 20-year warranty, eco-friendly R32 refrigerant, and a durable anti-corrosion ABS/aluminum casing.
Take full control from your phone with built-in Wi-Fi and an intuitive touchscreen interface. Switch between Boost Mode for rapid heating or Silence Mode for near-silent performance.
Why Choose the AquaSolis AQS+ Back Discharge Heat Pump?
-
Eco-Friendly R32 Refrigerant
Efficient and planet-friendly – delivers powerful heating with lower global warming potential.
-
Mitsubishi Twin-Rotary DC Inverter Compressor
Renowned for reliability, quiet operation, and outstanding energy efficiency.
-
Reverse Cycle (Heating & Cooling)
Year-round comfort with automatic defrost and pinpoint temperature control.
-
20-Year Warranty on Titanium Heat Exchanger
Built to last with a corrosion-resistant twisted titanium coil – offering long-term peace of mind.
Benefits:
Powered by InverPad Technology
Designed for silence and efficiency – cutting-edge innovation drives every detail.
COP of up to 16
EEV Technology boosts COP by 20%
Consumes 69% less energy than on/off heat pumps.
Adaptive Inverter Technology
Stepless DC inverter technology adjusts fan and compressor speed to deliver smart, energy-efficient heating.
Backward Airflow Design
Sends heat and sound out the back – perfect for tight spots near patios or windows.
Advanced Noise Cancelling Technology
Operates as quietly as 40dB(A) – no louder than a whisper."
Twisted Titanium Heat Exchanger
Twice as efficient as traditional on/off heat pumps – corrosion-resistant and built to last.
Cold Weather Performance
Operates efficiently in temperatures as low as -10°C – ideal for year-round swimming.
Spa Heating Capability
Heats up to 40°C – ideal for swim spas and spas.
Simple Touch Screen Controller
User-friendly digital interface with clear temperature and mode display.
Key Features:
- InverPad Technology: Combines patented airflow design, precision inverter control, and acoustic shielding for ultra-quiet operation.
- Premium Inverter Power Supply: Delivers high performance and energy savings, with a COP of up to 16.
- Mitsubishi Twin-Rotary Inverter Compressor: Industry-leading efficiency and long-term reliability.
- DC Brushless Fan Motor: Provides smooth, quiet airflow and extended service life.
- Wi-Fi Enabled: Control everything from your smartphone via the InverGO app
Turn On/Off
Set water temperature
Timer scheduling
Heating, Cooling, and Auto Modes
Silence and Boost modes
Live weather display
- Touchscreen Digital Controller: Intuitive interface with real-time temperature feedback and full mode control. Features a power-down memory function that retains settings after power interruptions for added convenience and reliability.
- Reverse Cycle Heating & Cooling: Year-round comfort with automatic defrost function for cold climates.
- Three Operating Modes:
Heating Mode: Set water temperature between 18°C–40°C
Cooling Mode: Set water temperature between 12°C–30°C
Auto Mode: Automatically switches between heating and cooling based on inlet water temperature (12°C–40°C range)
Silence Mode: 20–80% output with noise reduced by 3dB(A)
Boost Mode: 20–100% output for rapid heating
- Twisted Titanium Heat Exchanger: Superior heat transfer and durability – backed by a 20-year warranty.
- Eco-Friendly R32 Refrigerant:
R32 is a new-generation refrigerant specifically designed for high-efficiency pool and spa heat pumps. It offers excellent performance while minimising environmental impact:
- Low Global Warming Potential (GWP) of 675 – just 30% of R410A
- Smaller charge volume enables more compact and efficient system design
- Back Discharge Airflow: Discreet, rear-facing exhaust minimizes disruption around the pool area.
- Anti-Corrosion ABS/Aluminum Casing: Built to endure harsh Australian weather conditions.
- Safety First: Equipped with high/low pressure protection and comprehensive electrical safeguards.
- Australian Electrical Approval: Fully certified for safe operation across Australia and New Zealand.
Optional Accessories:
The AquaSolis Heat Pump is compatible with the SensaHeat DT-H5RO-I Heat Pump Interface / Controller, enabling advanced heat demand control for optimal water temperature at any time of day.
Heat Demand: As most pools are filtered for around 8 hours per day, additional run times are often needed to maintain the desired water temperature. The AquaSolis heat pump includes a ‘Demand Heat’ function that works with the DT-H5RO-I controller. When heating is required, the controller overrides the filter pump to maintain the set temperature. The heat pump monitors water temperature within its defined schedule and activates the pump as needed. This ensures your pool is always ready to swim, day or night.
Warranty:
- 20 years: Anti-corrosion warranty on the titanium heat exchanger coils
- 7 years: Compressors
- 2 years: Parts
- 1 year: On-site Labour
Ventilation Requirements:
All AquaSolis inverter heat pumps shall be installed in an outdoor location with adequate ventilation.
- The diagram displays the minimum outdoor ventilation area required for optimum performance.
- Locate the heat pump in an easily accessible position to ensure easy access for operation and service.
- Ensure condensation water discharged from the bottom of the heat pump has a course to freely drain away.
AquaSolis Pool & Spa Heat Pumps Specifications:
| Model |
ASHP13 |
ASHP17 |
ASHP21 |
ASHP28 |
ASHP35S |
| Performance Condition: Air 27°C/ Water 27°C/ Humidity 80% |
| Heating capacity (kW) |
13.0 |
17.5 |
20.8 |
27.8 |
35.0 |
| COP Range |
14.5-7.0 |
15.6-6.9 |
14.6-7.0 |
15.8-7.2 |
15.3-7.0 |
| Average COP at 50% Speed |
10.4 |
10.9 |
10.9 |
11.0 |
10.6 |
Performance Condition: Air 15°C/ Water 26°C/ Humidity 70% |
| Heating Capacity (kW) |
8.9 |
12.3 |
14.3 |
18.8 |
24.0 |
| COP Range |
7.5-4.9 |
7.7-4.9 |
6.9-4.9 |
7.8-4.9 |
7.5-5.0 |
| Average COP at 50% Speed |
6.3 |
6.5 |
6.5 |
6.5 |
6.6 |
| Performance Condition: Air 35°C/ Water 28°C/ Humidity 80% |
| Cooling Capacity (kW) |
6.2 |
8.0 |
10.0 |
11.7 |
16.0 |
| Technical Specifications |
| Air temperature operating range |
-10°C～43°C |
| Heating temperature setting range |
18°C～40°C |
| Cooling temperature setting range |
12°C～30°C |
| Ambient air temperature for best performance |
between 15°C ~ 25°C |
| Reverse Cycle |
Standard |
| WiFi |
Standard |
| Heat Exchanger |
Twisted Titanium |
| Power Supply |
230V 1 Ph |
230V 1 Ph |
230V 1 Ph |
230V 1 Ph |
400V 3 Ph |
| Electrical Connection |
15A Plug |
Hard Wired |
Hard Wired |
Hard Wired |
Hard Wired |
| Rated Input Power (kW) |
0.26-1.80 |
0.32-2.51 |
0.38-2.92 |
0.50-3.84 |
0.65-4.80 |
| Rated Input Current (A) |
1.13-7.83 |
1.39-10.9 |
1.65-12.7 |
2.17-16.7 |
0.94-6.96 |
| Maximum Input Current (A) |
12.0 |
15.0 |
17.0 |
20.0 |
10.5 |
| Power Cord (core/mm² |
3x2.5 |
3x4 |
3x4 |
3x6 |
4x2.5 |
| Sound Level at 1m dB (A) |
40.1-48.7 |
41.1-51.8 |
38.9-52.2 |
41.5-52.9 |
40.6-52.6 |
| Sound Level at 10m dB (A) |
20.1-28.7 |
21.1-31.8 |
18.9-32.2 |
21.5-32.9 |
20.6-32.6 |
| Advised Water Flow (L/Min) |
70-100 |
100-130 |
130-170 |
170-200 |
200-300 |
| Water Connection (mm) |
40mm |
| Net Weight (kg) |
59 |
68 |
74 |
94 |
140 |
| Net Dimension L x W x H (mm) |
890x440x658 |
1060x440x658 |
1060x440x758 |
1060x430x958 |
1310x527x990 |
Remarks: This heat pump is designed to operate effectively within an ambient air temperature range of -10°C to 43°C. Performance outside of this range may not be guaranteed. Please note that heating and cooling output may vary depending on environmental conditions.
Specifications and technical parameters are subject to change without notice as part of ongoing product development and improvements. For the most accurate and current information, please refer to the ID plate on your heat pump.
In The Box:
- 1 x Heat Pump Unit
- 2 x Barrel Union 40mm
- 1 x Drainage Kit (hose and fitting)
- 1 x Installation Manual
Basic Heater Sizing Guide for Extended Swimming Season
The table below provides a general guide for sizing your pool heat pump to extend your swimming season from September to April. Please note that many factors influence the correct heater size, and we strongly recommend having a professional sizing assessment completed prior to purchase.
These recommendations are based on average temperatures, humidity, and wind conditions in each listed location.
|
20,000L |
40,000L |
60,000L |
80,000L |
| Brisbane |
9–13kW |
9–13kW |
13–17kW |
20–21kW |
| Sydney |
9–13kW |
13kW |
20–21kW |
24–28kW |
| Melbourne |
13kW |
20–21kW |
28kW |
35kW |
| Canberra |
13kW |
20–21kW |
28kW |
35kW |
| Hobart |
13kW |
20–21kW |
28kW |
35kW |
| Adelaide |
13kW |
16–17kW |
24–28kW |
35kW |
| Perth |
9–13kW |
16–17kW |
21–24kW |
28kW |
Please Note: This chart is intended as a guide only. It assumes a target water temperature of 28°C for an extended swimming season (Sept–Apr), with an average in-ground pool fitted with a thermal cover, operating for 10 hours per day. Performance may vary depending on factors such as water volume, exposure to wind, shade, soil type, time of year, cover quality, and local weather conditions.
Frequently Asked Questions:
How quiet is the AquaSolis AQS+ heat pump?
Thanks to patented InverPad Technology and a DC brushless fan motor, the AquaSolis operates as quietly as 40dB(A) at 1 metre – similar to a whisper in a library. Perfect for installation near bedrooms or outdoor entertaining areas.
Can I run it in cold weather?
Yes. The AquaSolis is built for year-round performance and operates efficiently in conditions as low as -10°C, with automatic defrost functionality to maintain performance in winter.
Does the AquaSolis AQS+ provide both heating and cooling?
Yes, it offers reverse cycle operation, giving you heating in winter and cooling in summer. You can also use Auto Mode, which switches between heating and cooling automatically based on the pool water temperature.
How do I choose the right heat pump for my pool?
Choosing the right size heat pump depends on factors like your pool’s volume, location, usage season, and whether a cover is used. For sizing guidance, visit:
Need expert advice? Click here to provide your pool details, and one of our technicians will recommend the best option for you.
Is the AquaSolis AQS+ heat pump Wi-Fi enabled?
Yes. Every AquaSolis unit includes built-in Wi-Fi and is compatible with the InverGO App (iOS and Android), allowing full remote control from your smartphone.
How energy-efficient is it?
The AquaSolis offers a COP of up to 16 and uses Mitsubishi inverter technology and EEV control to consume up to 69% less energy than standard on/off heat pumps.
Can I use it to heat a spa?
Yes. It can heat water up to 40°C, making it suitable for spas, swim spas, and plunge pools.
Do I need a separate controller?
The unit includes an intuitive touchscreen controller as standard. For enhanced temperature control, it’s compatible with the optional SensaHeat DT-H5RO-I Interface/Controller, which can override your filter timer to maintain consistent water temperature.
What happens if the power goes out?
The heat pump includes a power-down memory function, so it will retain its settings and resume operation once power is restored.
