Air Source Heat Pump

Air Source Heat Pump’s convert heat from the air outside and transfers it to the hot tub water.

​Our range of heat pumps draw air into the unit through an evaporator coil of liquid refrigerant, the air drawn in warms the coolant which is pumped through to a compressor, the compression process then heats the refrigerant much more, the liquid moves through to a condenser and to a heat exchanger.

The heat exchanger is where the heated refrigerant passes off it’s heat into the hot tub water which then circulates back to the hot tub, the refrigerant now moves on to cool down through to the expansion valve and evaporator and begins its cycle again.


Our air source heat pumps can offer as much as the following depending on models.

Great COP Rating

The efficiency of a heat pump is measured by their Coefficient of Performance (COP). When selecting a heat pump, keep in mind that the higher the ratio, the more efficient the unit and the more efficient the heat delivery.  

A COP value of 3 means that you get 3kWh of heat output for every 1kWh of electricity used to run the pump. Higher COP values represent a heat delivery that is relatively more efficient.
Our Aquaintel Pump have an amazing average COP of 9.5

Energy Saving

Full inverter technology enables the fan and compressor to work intelligently, starting with Turbo mode to heat up the water to the set temperature.

The water temperature is then maintained with a constant and low frequency, this helps to save huge amounts of energy.

Multiple Modes

Turbo Mode
Intelligent operation to achieve an extra 20% heating capacity, fast heating & excellent performance for all year round bathing.

Silent Mode
It achieves the highest energy efficiency and greatly improves customers’ experience.

Smart Mode
Dynamically works to maintain your spa water temperature no matter the climate.

Whisper Silent

Air Source Heat Pump AquaIntel SW70 7kW

£2,995 £1,995

Average-COP 9.5
To maintain pool temperature for 95% of pool season, Mr. Smart runs at average 50% capacity to provide the best energy saving performance and most silent pool environment.

Stepless DC Inverter Technology
With Stepless DC Inverter, the compressor speed can be adjusted hertz by hertz and fan motor speed can be adjusted round by round. It adapts intelligently to different heating demands.

Comfort Silence
Thanks to Inverquark technology, Stepless DC inverter compressor and DC brushless fan motor, Mr. Smart runs very quietly and provides you a comfortable heating environment.

Professional Pool Heating Control System
Benefiting from Stepless DC inverter technology, Mr. Smart speed will be adjusted intelligently according to the environment and water temperature.

Input Power0.97 kW
Power Supply220-240V / 50Hz
Current Rating4.5 AMP

Hydro-Pro P6

£2,495 £1,795

Hydro-Pro heat pump helps to extend the swimming season, controlling pool temperature in hot summer and helps you enjoy your pool investment for longer time during the year.


  • “All seasons” model works down to -5°C
  • Quiet running
  • For heating and cooling
  • Easy temperature control with LCD display
  • Automatic defrost
  • High efficiency, COP up to 6.4
  • Cabinet made of ABS
  • R32 gas, which has a 3x lower GWP (Global Warming Potential) than the R410A
  • 2 year warranty for heat pump, 7 year warranty for compressor and heat exchanger
  • Winter cover included
  • Maximum pool volume depending on environmental conditions

Air Source Heat Pump R32

£2,195 £1,695

The R32 5KW heat pump is a highly efficient heating solution designed specifically for hot tubs. It utilizes a refrigerant called R32 to generate heat, which can be used to warm up the water in the hot tub.

The R32 heat pump features a durable Titanium heat exchanger, which is highly resistant to corrosion and can withstand harsh environments. This ensures that the heat pump will last for a long time and require minimal maintenance.

Overall, the R32 heat pump is an excellent choice for anyone looking for an efficient and reliable heating solution for their hot tub.

Welcome back...

Sign in to your account

The Roman Spas brand has been acquired by Scunthorpe Hot Tubs. Please visit our website to see our best and latest deals!

We will help with any warranty enquiries, please email us with any questions: [email protected]

Includes Free R32 Low Temp Heat Pump 5KW

Valued at £1,995

Our heat pump can save you money and keep your hot tub running all year. It’s efficient and perfect for regular use. It’s also quiet and can operate well in temperatures between -7°C and 43°C. Consider it an investment that helps you save on energy costs while maintaining your hot tub’s temperature.

– Offer only available with Thermal and Platinum Ranges –

Hot Tub Cover Lifter (Recommended)

With the use of our Cover Lifter, one person can easily remove our thermo cover with ease

Hot Tub Steps (Recommended)

Perfect for easy access to your hot tub. (Style may vary depending on hot tub range)

Hot Tub Hand Rail

Enter or exit your hot tub without much effort or cost.

Additional Filter

Replacement for hot tub filters

Adjustable Towel bar

Perfect for having your towel ready when leaving the hot tub.