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Astral Pro Elyo Inverboost NN All Year heat Pumps 7kw - 35kw

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Pro Elyo Inverboost NN All Year Heat Pump Range

1. Description

HeatPumps4Pools are the leading specialist supplier of swimming pool heat pumps. We have many years of experience in the market and have used our expertise to research and design our own range of swimming pool heat pumps.

New for 2019, the Astral Pro-Elyo Inverboost NN range of pool heat pumps really do offer the best in terms of efficiency, performance, reliability and low noise operation.

A heat pump with 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 around.
Technical 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.
• Fluidra Connect-compatible through a Modbus connection to the Fluidra Connect platform.
• A soft starter prevents current surges when the compressor starts up.
• Lowest outdoor air working temperature of -20 ºC, designed to work in cold climates.
• The 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, free of agents that damage the ozone layer.
• ABS plastic housing, which prevents corrosion.
• Titanium exchanger with twisted tube for enhanced performance.
• High- and low-pressure flow meter and pressure switch.
• Modbus-compatible.
Accessories included: Winter cover, anti-vibration brackets, drainage connection, screen watertight box, 10m screen connection cable, hydraulic connection fittings and Modbus signal cable.




Pro-Elyo Inverboost Heat Pump

Pro-Elyo Inverboost Heat Pump
Pro-Elyo Inverboost NN 7kW, 10kw, 13kw, 17kw, 20kw - Single Fan, Horizontal Pro-Elyo Inverboost NN 26kw+35kw - Twin Fan, Horizontal


2. Features

  • Fully inverter driven with variable speed fan and compressor to deliver the lowest running costs with maximum heat output
  • High efficiency with COPs of up to 13. This means that for every 1kw of electricity used by the heat pump, 13kw of heat is returned to the pool.
  • The desired water temperature can be adjusted in steps of 0.1  °C.
  • Equipped with an easy to use 5-inch colour touch screen display / control panel.
  • Remote control and monitor your heat pump via an app on your smartphone
  • Remote support from HeatPumps4Pools via the wifi module
  • Top quality Mitsubishi variable speed inverter compressor
  • Brushless variable speed DC fan motor - very efficient with extremely quiet operation
  • Control panel is lockable to prevent tampering with the pool set temperature (useful for rented properties)
  • Display shows temperature & power consumption curves to monitor the performance of the heat pump
  • Six different models:9kw, 12kw, 17kw, 19.5kw, 24.2kw, 28 kw and 34kw
  • All models single phase power (ie 220v to 240v)
  • 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 defrosting.
  • Suitable for use on koi ponds
  • Titanium heat exchanger - resistant to corrosion from chlorine or salt pools.
  • Operates in air temperatures as low as -15  °C.
  • Capable of heating and cooling, all year round.
  • Optional wifi module - control the heat pump from your smartphone or any web browser
  • 3-Year Warranty


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

The sizing guide for a covered pool is:-

Model Kw
Recommended Pool Volumes
Pro-Elyo Inverboost NN Horizontal 7kw 10-26m3
Pro-Elyo Inverboost NN Horizontal 10kw
Pro-Elyo Inverboost NN Horizontal 13kw
Pro-Elyo Inverboost NN Horizontal 17kw
Pro-Elyo Inverboost NN Horizontal 20kw 58-122m3
Pro-Elyo Inverboost NN Horizontal 26kw
Pro-Elyo Inverboost NN Horizontal (3-phase) 26kw
Pro-Elyo Inverboost NN Horizontal 35kw 78-160m3
Pro-Elyo Inverboost NN Horizontal (3-phase) 35kw 78-160m3

3b. The sizing guide for koi ponds is:-

For a koi pond that is heated all year round with a winter temperature of around 12c and a summer temperature of around 20-22c, we recommend the following sizing:-

 Pond Sizing Guide
Model Kw
Max Pond Volume
Pro-Elyo Inverboost NN Horizontal 7kw  gallons
Pro-Elyo Inverboost NN Horizontal 10kw  gallons
Pro-Elyo Inverboost NN Horizontal 13kw  gallons
Pro-Elyo Inverboost NN Horizontal 17kw
Pro-Elyo Inverboost NN Horizontal 20kw
Pro-Elyo Inverboost NN Horizontal 26kw
Pro-Elyo Inverboost NN Horizontal (3-phase) 26kw
Pro-Elyo Inverboost NN Horizontal 35kw
Pro-Elyo Inverboost NN Horizontal (3-phase) 35kw gallons

(Note: This assumes that the pond is covered in winter and that a temperature of +12c is to be maintained over winter)

All Pro-Elyo Inverboost NN heat pumps are for single phase power (ie 220v to 240v) to suit most properties

However there are 2 model available in 3 Phase power supply (380v)

4. COP And Performance

By using the latest inverter technology, the Pro-Elyo Inverboost NN canout perform 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


7. Wi-Fi Control

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



Note: A 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. 

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



9. Whats included:

The Pro-Elyo Inverboost NN horizontal range of heat pumps come with:-
  • Winter Cover
  • Anti vibration supports
  • Ddrain conection
  • Sscreen sealed box
  • 10m Screen Connection
  • Hydraulic connection fittings
  • Modbus signal cable


10.Optional Extras:

Heavy Duty Mounting Feet Thermotec-Inverter-Horizontal-rear.jpg

These 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 Slabs section for more information.

Bypass Kit Please see our Bypass Kits section 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 Cover section section for more information.


11. Payment

We accept all major credit and debit cards, cheques and Bank Transfer

All major credit cards accepted

Note: We offer an additional 1% discount on these prices for payment by debit card or bank transfer.  Just choose bank transfer or debit card as the payment type when you complete the checkout process.


12. 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 FAQ pages 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 12 month 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.

We hold spare parts to support all Pro-Elyo Inverboost NN heat pumps both during and after the warranty period


17. Product Literature

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

Duratech WarrantyPro-Elyo Inverboost NN Manual



18. Product Videos


19. Customer Feedback


20. Assistance?

If you need any assistance or advice as to which model would be best for your pool, please feel free to Contact 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


  • Model: Elyo Inverboost Heat Pumps