Hot Splash Heat Pump 3.75kw Plug and Play for Above Ground Swimming Pools up to 9m3 for Summer Use

£395.00 (£329.17 exc VAT)

Availability: 20 in stock GTIN: B0CLPC4R43
Optional Items:-


Hot Splash Heat Pump 3.75kw Plug and Play for Above Ground Swimming Pools up to 9m3 for Summer Use

The Hot Splash are now all sold out for 2023, as an alternative, please look at the Thermotec Mini heat pumps


SPECIAL OFFER – HOT SPLASH HEAT PUMP PRICE REDUCED FROM £450 TO £395.00. Grab a bargain while stocks last !

Hot Splash Heat Pump 3.35kw HS35

Hot Splash Heat Pump – New larger sized model:  Hot Splash Heat Pump 3.75kw are now in stock !

1. Hot Splash Heat Pump Description

Introducing the fabulous new improved Hot Splash Heat Pump 3.75kw

The new Hot Splash has improved heat output, quieter operation and works at lower air temperatures (down to +10c, was +15c)

The World’s Smallest Plug and Play Heat Pump!

This model has a 3-pin UK RCD/Plug

 Slash the cost of heating your pool using the Hot Splash rather than an electric heater

Call us now to order your Hot Splash Heat Pump

They are designed for small above ground pools up to around 9m3 of water.

intex pools - hot splash heat pump

The Hot Splash heat pumps are incredibly easy to setup for your pool.

They offer much lower running costs that using an electric pool heater.

The New Hot Splash outputs up to 3.75kw of pool heat but only uses 0.56kw of electricity!

2. Hot Splash Heat Pump Features

  • Improved heat output: Now outputs up to 3.75kw of pool heat from only 0.56kw of electricity used
  • Brand new design
  • Dimensions – 29 x 31 x 37cm (l x w x h)
  • Weight 15kg
  • Suitable for pools up to 9m3 of pool  water
  • Desired water temperature can be set to be between 20c and 40c
  • Simple “plug and play” heat pump
  • Comes complete with 2.5 meter power cable and UK 3-pin Plug / RCD for electrical safety
  • Includes 2 meters of 1.25″ (32mm) pool hose to connect to your pool
  • 1.25″ (32mm) water connections for hose
  • 2 x hose clips included
  • Operates to lower air temperatures: Now operates with air temperatures of +10c and above
  • Requires a flow rate of 2.5m3 an hour from your pump/filter
  • Eco Friendly R32 refrigerant gas
  • Full Flow and No Frost technology – No bypass required
  • Easy to operate
  • Integrated carry handle – makes it easy to lift and move when not in use.
  • Digital control panel – simply set the pool temperature required and the Hot Splash will tun on and off as required to maintain the desired pool temperature.
  • High quality polymer – corrosion and UV resistant case
  • Gives much lower running costs than an electric pool heater
  • Titanium Heat Exchanger
  • 2-Year Warranty

Note: As the Hot Splash requires an air temperature of +10c and above to operate, it is aimed at summer use eg May-Sept. It cannot operate during the day or night when the air temp is below +10c. If you require a model which can work at lower temperatures, please look at the Nano mini heat pump .

Hot Splash Heat Pump 3.35kw HS35

3. Hot Splash Heat Pump Easy to Use Digital Control Panel

The Hot Splash HS40 has a touch screen easy to use display.

Simply use the up and down arrow keys to set your desired pool temperature and the Hot Splash will automatically turn on and off to maintain the desired temperature

4. Hot Splash Heat Pump is fitted with UK Plug/RCD

This listing is for the 3-pin UK RCD/Plug

We can send with a EU 2 pin plug if requested

hot splash pool heat pump EU plug

Note: The Hot Splash heat pumps require a 220v or 240v, 50hz power supply and therefore are not suitable for use in the USA/Canada (which uses a 110v, 60hz power supply)

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

How to Calculate Your pool Water Volume:

You can easily calculate the water volume in your pool as follows: –

Round Pools

To calculate the volume of a round pool, you can use the formula

Pool Volume = 3.14 x radius x radius x depth

  1. Measure the diameter of the pool in metres
  2. Half the diameter to give the radius of the pool
  3. Multiply 3.14 x radius x radius x pool depth


A 10ft x 30” pool

Diameter = 10′ x 0.305 = 3.05m

Radius = 3.05 / 2 = 1.52m

Volume = 3.14 x 1.52 x 1.52 x 0.76m = 5.5 m3

The Hot Splash 3.75kw supports pools up to 9m3 so would be OK for this pool

Rectangular Pools

Pool volume = length x width x depth


6m x 4m pool, 0.8 m deep = 6 x 4 x 0.8 = 19.2 m3

Maximum for Hot Splash 3.75kw = 9m3 so this pool would be too large – look at our SunSpring heat pumps

Typical Pool Sizes and Volumes

8′ x 30″ Intex above Ground pool = 3.6 m3 – Hot Splash OK !

10′ x 30″ Intex above Ground pool = 5.5m3 – Hot Splash OK !

12′ x 36″ Intex above Ground pool = 9.6 m3 – Hot Splash too small (we would recommend allowing 20% clearance on water volume to heat pump capability volume)

Need a Larger Size

If your above ground pool is larger than 9m3, the please look at our SunSpring range of pool heat pumps as these will cover pools that have from 12m3 of water up to 35m3 of water.

7. Specifications

Please Specifications tab at the top of the page

Hot Splash HS40 Specifications

8. Installation

Installation is very easy and straightforward.

The hot splash is connected to your existing pool pipework

It uses the existing pool circulation pump to pump the pool water through it.

Please see the user manual below for more information on how to install your Hot Splash heat pump

9. Savings

Using the Hot Splash heat pump to heat your pool rather than an electric heater will save you money on running costs

The Hot Splash only uses 0.56kw of electricity to produce 3.75kw of pool heat.

If you compare this with an electric pool heater, a 3.75kw electric pool heater would use 3.75kw of electricity

The Hot Splash therefore is only less than 1/4 the running cost of an electric pool heater – saving you money!

10. Pool Hose

You may need to purchase an additional length of pool hose to connect from your heat pump to the pool

We sell both 1.5″ and 1.25″ pool hose


11. Availability

Hot Splash pool heat pumps are held in stock in the UK and can be shipped to any UK address on a 1 – 3 day delivery service

12. Delivery

The price includes FREE UK delivery.

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

13. Warranty

The Hot Splash heat pumps come with a 2-year warranty

  • 2-years parts warranty on all components in the UK
  • Warranty subject to the unit being installed in accordance with manufacturer’s instructions.

14. Technical Support

We are happy to provide technical support for all swimming pool heat pumps that we supply. Please call us and we will advise you further.

15. Product Literature

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

16. 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 enquiries@heatpumps4pools.com


Hot Splash HS40 Specifications

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


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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

Weight16 kg
Dimensions31 × 36 × 39 cm