Outdoor 4kW Air Source Heat Pump For Hot Tub/Swim Spa

Features we love

• More than twice as efficient as a conventional heater
• Huge saving on running costs – lower your energy bills by up to 50% a year
• Saves up to £7,500 in electricity over the lifetime of your spa
• Pays for itself in approx 2 years
• Environmentally friendly – save the planet, save your pocket
• Compatible with all makes and models of hot tubs and swim spas
• Works in a temperature variant of -7 to 40 degrees for use all year round*
• Compact and quiet at just 42cm long and 49dB
• Full 12 months warranty included for peace of mind

*The colder the ambient temperature and below 15°C, the longer it will take to heat up to your ideal working temperature.

All about me

Introducing our Outdoor hot tub and swim spa heat pump. This compact but powerful air source heat pump offers a sustainable, low-carbon alternative to traditional heating systems, saving you up to 50% on your running costs.*

Compact and discreet

At only 42cm long, our small but mighty heat pump comes in a compact design that won’t intrude into your garden space, and with a noise level of 49dB, you can soak in peace.

Energy-efficient heating

With a coefficient of performance (COP) of up to 5, you can enjoy a warm and inviting hot tub without worrying about soaring energy bills. A 4kW heating capacity makes sure that your spa heats up quickly, allowing you to get in your tub sooner. 

Our air source heat pump delivers up to three times more warmth while reducing energy costs and saving you time and money. In fact, for every 1kW it uses, you can enjoy 2kW** of energy in return. And, in just two years, it will have paid for itself from its energy savings. Save the planet, save your pocket.

Year round savings

Our air source heat pump works in temperatures ranging from -7°C to 40°C***, making it a versatile choice for year-round relaxation. Find out more about how air source heat pumps work here.

Need a more powerful air source heat pump? Shop our 7kW , 9kW and 11kW options.

 

*2kW return based on an ambient temperature of 10°C. Efficiency improves with increased temperature, reaching 4kW in 20°C+ weather. **The colder the ambient temperature, the longer it will take to heat up to your ideal working temperature.

Tech spec

• Dimensions (LxWxH): 420 x 350 x 380mm
• Weight: 25kg
• Coefficient of performance (COP): 3.7-5
• Operating air temperature: -7°C~40°C*
• Heating capacity (air 27°C, water 26°C, humidity 80%): 4kW
• Coefficient of performance (COP): 5
• Heating capacity (air 15°C, water 26°C, humidity 70%): 3kW
• Coefficient of performance (COP): 3.7
• 220-240V/1Ph/50 hz power supply
• 4m power cable and UK plug with RCD protection
• Sound pressure at 1m dB (A): 49
• Refrigerant: R32 (180g), more efficient and ecological than standard R410A refrigerant
• *The colder the ambient temperature and below 15°C, the longer it will take to heat up to your ideal working temperature.

How does an air source heat pump work?

A heat pump works like an air conditioner, only in reverse. In essence, it takes air from the atmosphere, extracts the heat and transfers it to the water passing through the pump.

From a technical perspective, a heat pump pushes a refrigerant through its copper heat exchanger coils. Then, the compressor and condenser work together to change the refrigerant’s state from a cool liquid to a warm gas.

In heating mode, the liquid refrigerant boils as it travels through the coils. Any heat carried within the refrigerant is stored until it evaporates; then, the gas is compressed, which increases its temperature. Finally, the gas moves through a pressure valve, which returns it to a liquid state while transferring the heat to the element.

Find out more about how air source heat pumps work here.

Video

How do I order?

Place your order using the ‘add to basket’ button on this page. From there, one of our experts will contact you to ensure this heat pump is compatible with your setup and can be fitted safely. 

Delivery is included in the price. Let us install it for you, or do it yourself if you’re a competent DIYer

*Please note: “Pays for itself in 2 years” is based on a retail price of £999 and the average cost of £1000 per year to run a hot tub. Saving up to 50% based on average hot tub use if powered permanently and based on the average UK energy cost. Savings are not guaranteed and can differ due to many factors, including but not limited to: hot tub usage, weather and temperature changes, age and efficiency of hot tub, cover, insulation and changes in energy costs. The colder the ambient temperature and below 15°C, the longer it will take to heat up to your ideal working temperature.