Air Source Heat Pumps for Hot Tubs, Pools & Homes

Jay Bowers • September 16, 2026

Heat Smarter with an Air Source Heat Pump

Air source heat pump beside a pool, with text promoting efficient heating for hot tubs, pools and homes

Looking for a more efficient way to heat your hot tub, swimming pool or home?


Air source heat pumps offer an effective alternative to conventional electric heating by capturing naturally occurring heat from the outside air and transferring it into your water or heating system.


At Luso Spas, we supply air source heat pump solutions suitable for a range of domestic and leisure applications, helping you maintain comfortable temperatures while making more efficient use of electricity.


Whether you want to reduce the cost of keeping a swimming pool warm, improve the efficiency of your hot tub or explore an alternative heating solution for your property, our team can help you find the right system.


How Does an Air Source Heat Pump Work?

An air source heat pump works by extracting thermal energy from the outside air.


A refrigerant absorbs this heat before it is compressed, increasing its temperature. The captured heat can then be transferred into the water or heating system.

Because the system is moving existing heat rather than creating all of the heat directly from electricity, a suitable heat pump can deliver significantly more heat energy than the electrical energy it consumes.


Performance will vary depending on factors including outside temperature, water temperature, installation, heat loss and the specification of the heat pump.


Air Source Heat Pumps for Swimming Pools

Heating a swimming pool can represent a significant part of its overall running cost.


A correctly sized swimming pool heat pump can provide an efficient way to maintain a comfortable water temperature throughout the swimming season.

They can be suitable for:


  • Domestic outdoor swimming pools
  • Indoor swimming pools
  • Exercise and hydrotherapy pools
  • Commercial and leisure applications
  • New pool installations
  • Upgrades to existing pool heating systems


Correct sizing is particularly important. Pool volume, desired water temperature, location, insulation and whether you use a suitable pool cover can all influence the heat pump required.


Air Source Heat Pumps for Hot Tubs & Spas

A heat pump can also be used alongside suitable hot tubs and spa systems to help reduce reliance on conventional electric water heating.

For hot tub owners who use their spa regularly throughout the year, improving heating efficiency can make a significant difference to overall energy consumption.


The best solution will depend on the hot tub, existing equipment, pipework, available space and how frequently the spa is used.

Speak to Luso Spas and we can help you assess the options.


What Are the Benefits of an Air Source Heat Pump?

Choosing the right heat pump can provide several advantages:


Greater heating efficiency
Heat pumps transfer heat from the surrounding air rather than relying entirely on direct electrical resistance heating.

Potentially lower running costs
Greater efficiency can reduce the amount of electricity required to produce the same amount of usable heat compared with some conventional electric heating systems.

Ideal for pools and spas
Heat pumps are particularly well suited to maintaining water at a consistent temperature over longer periods.

Lower-carbon heating
Using electricity efficiently can help reduce the carbon impact of heating, particularly as more UK electricity is generated from renewable and low-carbon sources.

Automatic temperature control
Once correctly set up, a heat pump can maintain the selected water temperature automatically.


Choosing the Right Heat Pump

Bigger isn't automatically better.


Selecting the correct heat pump depends on several factors, including:


  • Pool or hot tub water volume
  • Required water temperature
  • Typical outside temperature
  • Indoor or outdoor installation
  • Frequency of use
  • Insulation and heat loss
  • Pool or spa cover
  • Existing pumps and filtration equipment
  • Available electrical supply


A correctly specified system helps deliver better performance without unnecessarily oversizing the equipment.


Why Choose Luso Spas?

Luso Spas specialises in hot tubs, swimming pools, spa equipment, accessories and outdoor living products, giving us practical experience of how heating equipment works as part of a complete water system.


Rather than simply choosing a heat pump based on its headline output, we can help you consider the application, water volume and existing equipment before deciding which solution is appropriate.


Need Help Choosing?

Not sure which air source heat pump you need?


Speak to the Luso Spas team.

Tell us whether you are heating a hot tub, swimming pool or property, together with the approximate size and current heating arrangement, and we can help you explore the most suitable options.


Browse our air source heat pumps below or contact Luso Spas for expert advice.


Frequently Asked Questions

  • Can an air source heat pump heat a swimming pool?

    Yes. Air source heat pumps are widely used to heat swimming pools by transferring heat from the outside air into the pool water.

  • Can I use a heat pump with a hot tub?

    Potentially, yes. Compatibility will depend on the hot tub, existing heating and circulation system and the heat pump being considered. Speak to Luso Spas before installation to ensure the equipment is suitable.

  • Do air source heat pumps work when it is cold outside?

    Yes. Heat energy is still present in outside air at low temperatures, although heat pump performance and efficiency will vary as outdoor temperatures change.

  • Are air source heat pumps cheaper to run?

    They can be more efficient than direct electric heating because they transfer heat rather than generating all of it directly. Actual running costs depend on electricity prices, outdoor temperatures, the installation and how the pool, spa or property is used.

  • What size heat pump do I need for my pool?

    The correct size depends on pool volume, desired temperature, heat loss, location and usage. Providing Luso Spas with these details will help identify an appropriate system.

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