Astral Pro Elyo Inverboost NN All Year heat Pumps 26kw – One Remaining



Pro Elyo Inverboost NN All Year Heat Pump Range

Pro-Elyo Inverboost Heat Pump

Update 12th April 2023: We have one 26kw single phase model left in stock, order while stocks last


1. Description

The Astral Pro-Elyo Inverboost NN range of pool heat pumps from Astral really offer a great product in terms of efficiency, performance, reliability and low noise operation.

They have an “A” energy rating for outdoor pools. It comes with inverter technology and is Fluidra Connect-compatible. It has been specially designed to obtain good performance in harsher climates. In addition, it runs in power-saving mode to achieve better energy efficiency, makes less noise than other heat pumps and can be used all year round.

2. Features

  •  “A” energy rating, which can make savings of up to 33%.
  •  Inverter technology, which automatically changes the power setting so that the heat pump runs at optimum efficiency levels.
  • Fully inverter driven with variable speed fan and compressor to deliver the lowest running costs with maximum heat output
  •  Fluidra Connect-compatible through a Modbus connection to the Fluidra Connect platform.
  •  The inverter starts the unit slowly which  prevents current surges when the compressor starts up.
  •  Lowest outdoor air working temperature of -20 ºC, designed to work in cold climates.
  •  Reverse cycle defrosting system makes defrosting faster.
  •  Heating and cooling modes, thanks to the four-way valve.
  •  Electronic expansion valve for enhanced COP performance.
  •  R-410a refrigerant gas
  •  ABS plastic housing to which prevent corrosion.
  •  Can heat and cool the pool water
  •  Titanium exchanger with twisted tube for corrosion resistance and enhanced performance.
  •  Water flow switch
  •  Modbus-compatible
  • Can be linked to wifi using the optional wifi module, Remote control and monitor your heat pump via an app on your smartphone
  • Three operating modes:-
    • Powerful – maximum heat output, runs at 100%
    • Smart – automatically selects between medium and maximum heat output
    • Silent – automatically selects between minimum and medium heat output
  • High efficiency with COPs of up to 16. This means that for every 1kw of electricity used by the heat pump, 16kw of heat is returned to the pool.
  • Suitable for pools, swim spas, hot tubs and koi ponds etc
  • Desired water temperature can be set from +10c to +40c
  • Soft start with reduced electrical startup requirements for properties with sensitive or limited power supplies
  • Low noise, variable speed fan.
  • Corrosion resistant case
  • Microprocessor controlled
  • Automatic hot gas defrost.
  • Titanium heat exchanger – resistant to corrosion from chlorine or salt pools.
  • Operates in air temperatures as low as -20 °C.
  • Capable of heating and cooling, all year round.
  • Optional wifi module – control the heat pump from your smartphone or any web browser
  • Mitsubishi inverter compressor
  • 2-Year Warranty
Pro-Elyo Inverboost Heat PumpPro-Elyo Inverboost Heat Pump
Pro-Elyo Inverboost NN 7kW, 9kw, 11kw, 14kw, 16kw, 20kw – Single Fan, HorizontalPro-Elyo Inverboost NN 26kw + 35kw – Twin Fan, Horizontal

3. What size heat pump do I require for my pool?

The sizing guide for a covered pool is:-

Recommended Pool Volumes
Pro-Elyo Inverboost NN Horizontal7kw10-26m3
Pro-Elyo Inverboost NN Horizontal9kw
Pro-Elyo Inverboost NN Horizontal11kw
Pro-Elyo Inverboost NN Horizontal14kw
Pro-Elyo Inverboost NN Horizontal16kwSEE NEW MODELS -PRO-ELYO TOUCH
Pro-Elyo Inverboost NN Horizontal20kwSEE NEW MODELS -PRO-ELYO TOUCH
Pro-Elyo Inverboost NN Horizontal26kw68-132m3
Pro-Elyo Inverboost NN Horizontal (3-phase)26kwSEE NEW MODELS -PRO-ELYO TOUCH
Pro-Elyo Inverboost NN Horizontal35kwSEE NEW MODELS -PRO-ELYO TOUCH
Pro-Elyo Inverboost NN Horizontal (3-phase)35kwSEE NEW MODELS -PRO-ELYO TOUCH

4. COP And Performance

By using the latest inverter technology, the Pro-Elyo Inverboost NN can outperform traditional on/off type heat pumps.

Even as the outside air temperature falls, the Pro-Elyo Inverboost NN will still perform well, delivering heat to your pool.

The Pro-Elyo Inverboost NN heat pumps can work well with outside air temperatures as low as -20c

The COP (Coefficient of Performance) is the ratio of the amount of heat (in kw) that the heat pump delivers to your pool compared to the electricity that the heat pump uses (in kw)

By using the latest inverter technology, the Pro-Elyo Inverboost NN has COPs up to 16. This means that in these conditions, 1kw of electricity consumed by the heat pump will output 16kw of heat to your pool !

Energy rating chart Pro-Elyo Inverboost

5. Extremely Quiet Operation

The Pro-Elyo Inverboost NN range work very silently thanks to a unique internal ventilation system and the inverter technology.

Both the fan and compressor automatically adjust their speed to match the pool heat demand, therefore once the pool is up to temperature, the unit can operate with reduced power consumption and noise.

6. LED Display

The Pro-Elyo Inverboost NN range provides easy to use controls via the LED display panel


7. Wi-Fi Control

The Fluidra Connect Platform allows the Pro-Elyo Inverboost NN to be monitored and controlled from a smartphone or any internet web browser or via the Modbus connection

The Fluidra Connect Platform allows you to operate lighting, and many other functions as well as your heat pump.

Note: When using the optional wifi module, a wifi signal is required at the location of the heat pump in order for the wifi module to be able to connect to your wifi.

Please test the strength of the wifi signal eg with a laptop or your smart phone before purchasing the wifi module. Please see the link to give you full information on this product on:


If you do not have a wifi signal at the heat pump’s location, then you can either:-

  1. Use a wifi signal extender to boost the signal in the area of the heat pump
  2. Use power LAN adaptors plugged into mains sockets in the house and the pool shed. You can then connect a wifi extended to the powerlan adaptor in your pool shed.

Please Contact Us if you need assistance with the wifi configuration

8. Specifications

Please Specifications tab at the top of the page

9. Accessories included

  • Winter cover (lightweight)
  • Anti-vibration mounting feet (x4)
  • Condensate drain spout
  • Weather protection flap over the display
  • 10m remote display connection cable
  • 50mm water connection fittings
  • Modbus signal cable

10. Optional Extras:

Fluidra Connect & Power Pack to give you Wi-Fi control
The Pro Elyo can be operated by WiFi but only with the Fluidra Connect box.  You also need the power pack. The Fluidra Connect platform is extensive. For further information, please visit   Please see the optional extras above
xxxHeavy Duty Mounting Feet Thermotec-Inverter-Horizontal-rear.jpgThese heat pumps come with rubber  mounting feet (see photo above).

Alternatively you can purchase these heavy duty Mounting Feet.

These raise the unit off the ground by approximately 100mm, and also help to reduce vibration.

Please see our Mounting Feet and Slabssection for more

Bypass Kit Please see our Bypass Kitssection section for more information.
Winter Cover The unit comes with a lightweight winter cover, however we offer a heavy duty cover which will give you added and extended protection against the winter weather

Please see our Winter Coversection section for more information.

11. Installation

Installation is straightforward. We can provide advice on installing your heat pump. We can also offer an installation service if required.

We recommend that a bypass is installed to allow the heat pump to be drained in winter if not in use. We sell bypass kits if required.


Please see our Installation Tips pages for information on how to install your heat pump. Our Photo Gallery also has photograph examples of pool heat pump installations and please also see the FAQpages for more information

The Pro-Elyo Inverboost NN heat pumps can also be installed on hot tubs and swim spas.

Please contact us for further advice

13. Availability

The range of Pro-Elyo Inverboost NN pool heat pumps are now in stock in the UK and can be shipped to any UK address on a 1 – 3 day delivery service.

14. Delivery

The price includes FREE UK delivery.

We can ship the Pro-Elyo Inverboost NN heat pumps to any country. Please contact us for a shipping quote.

15. Warranty

The Pro-Elyo Inverboost NN heat pumps come with a 2-year warranty on all components:-

We recommend that you retain the pallet and packaging that the heat pump was delivered with in case you need to return the unit to us for repairs under the warranty. 

The warranty will not apply where the heat pump has been installed incorrectly, or has been damaged by freezing

16. Technical Support

We are happy to provide technical support for all Pro-Elyo Inverboost NN swimming pool heat pumps that we supply.

17. Product Literature

Please see the Literature tab at the top of the page for the Brochure and User Manual downloads.

18. Assistance?

If you need any assistance or advice as to which model would be best for your pool, please email us

for more information, also see our FAQs page

All items sold in accordance with our terms and conditions

For all enquiries, please contact us at

Please click the links below to download pdf brochures for these products

Duratech WarrantyPro-Elyo Inverboost NN Manual


We accept all major credit and debit cards, Bank Transfer (BACS) and Paypal

All major credit cards accepted

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The prices shown include FREE UK delivery for orders over £50 or £6.50 for orders under £50

We can ship to any country. Please contact us for a shipping quote.

The lead time on most items is normally on a 1-2 day delivery,  subject to availability. Please call to check availability.

Additional information


7kw, 9kw, 11kw, 14kw, 16kw, 20kw, 24kw, 26kw, 35kw


Single Phase, 3 Phase