Hot tubs
You want your hot tub hot for less electricity
You want a 7kW heat pump.
Our 7kW Wi-Fi gives up to 12.9kW of heat for each 1kW of electricity.
See the 7kW heat pumpAir Source Heat Pumps For Hot Tubs
Heat pumps for hot tubs and swim spas from £1,699, with kerbside delivery in 1 to 2 days.
Three ways we help you pick the right heat pump
If you want an answer in ten seconds
Tell us one thing
What will the heat pump heat? We point you to the size that suits it.
I want to heat:
Pick an answer and your heat pumps show here.
If you want the full details
Read the manual
The installation manual for our 7kW and 12kW heat pumps covers where to put one, the pipe connections and the power supply.
If you would rather talk it through
Call the team
Tell us which hot tub or swim spa you have, and we will recommend the right heat pump.
01482 212322Three choices. Tap one to see the models.
7kW heat pumps
Our 7kW heat pumps suit most hot tubs. The Outdoor Living 7kW runs on a standard 220 to 240V supply, 8A at most, and works down to -7°C. The Aquark Mr Silence 7kW heats hot tubs, swim spas and pools up to 30 cubic metres.
Heat output7kW
Best forHot tubs
Models3
11 and 12kW heat pumps
More heat for bigger water. The Outdoor Living 12kW gives up to 12.5kW of heat and keeps working in air as cold as -12°C. The Aquark Mr Silence 11kW heats spas and pools up to 55 cubic metres.
Heat output11 to 12kW
Best forSwim spas and large hot tubs
Models3
Heat pumps you control from your phone
Set the temperature, switch modes and check the heat pump from a smartphone app, wherever you are. The Outdoor Living Wi-Fi models can also cool the water on hot days.
Heat output7 to 12kW
Best forControl from anywhere
Models4
Heat pump buying guide
How to choose a heat pump for your hot tub or swim spa
Two things decide which heat pump suits you: how much water you need to heat, and how you want to control it. Get those right and the choice of model is easy.
Short answer
Is a heat pump worth it for a hot tub?
A hot tub's own electric heater turns each unit of electricity into about one unit of heat. A heat pump takes warmth from the outside air, so the same unit of electricity gives you several units of heat: up to 12.9 on our 7kW Wi-Fi model, and 4.4 to 7.2 on the Aquark Mr Silence 7kW when the air is 15°C. Our heat pumps start from £1,699.
Start with your situation
Swim spas
You have a swim spa or a big hot tub
You want 11 to 12kW of heat.
The Outdoor Living 12kW gives up to 12.5kW of heat.
See the 12kW heat pump
Quiet gardens
You want to keep the garden peaceful
You want the quietest model.
The Aquark Mr Silence starts at just 36.5 dB(A).
See the Aquark Mr Silence 7kW
Winter use
You use your hot tub right through winter
You want a heat pump made for the cold.
The Outdoor Living 12kW keeps working down to -14°C.
See the 12kW Wi-Fi heat pumpHeat pump guides
Whether it pays, what size you need, connecting it up and looking after it in winter.
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Is a Heat Pump Worth It for a Hot Tub?A heat pump turns each kWh of electricity into about five kWh of heat for your hot tub. Here is what one...
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What Size Heat Pump Do You Need for a Hot Tub or Swim Spa?A 7kW heat pump suits most hot tubs and 11 to 12kW suits a swim spa. See how long each takes to...
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How to Connect a Heat Pump to a Hot TubWhere a hot tub heat pump goes, how the three-valve bypass joins it to the pipework, gluing the PVC pipes, the power...
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Hot Tub Heat Pump Winter Care: Frost, Draining and ServicingLeft on, a hot tub heat pump protects itself from frost. Here is when to drain it, how to clean it, what...
Before you order
- Check how much water your hot tub or swim spa holds.
- Pick 7kW for most hot tubs, or 11 to 12kW for a swim spa or large hot tub.
- Choose a firm, level spot outside, close to the tub.
- Plan the power supply: single phase 220 to 240V, with a qualified electrician.
- Plan the pipe run into the tub's pipework (50mm connections on Outdoor Living models).
- Decide whether you want to control it from your phone.
Not sure which size?
Tell us which hot tub or swim spa you have and we will recommend the right heat pump before you order.
Contact the teamQuestions about buying a heat pump
Straight answers on price, running costs, COP, size, winter use, noise, cooling, fitting, delivery and warranty.
Our Outdoor Living 7kW heat pumps start from £1,699 and the 12kW from £2,199. The Aquark Mr Silence starts from £1,999. The Wi-Fi models with app control cost a little more.
A hot tub's built-in electric heater gives about one unit of heat for each unit of electricity. A heat pump moves warmth from the outside air into the water, so it gives several units of heat for each unit of electricity. That is why heat pumps are the efficient way to keep a hot tub or swim spa hot all year.
COP stands for coefficient of performance: the heat a heat pump gives out divided by the electricity it uses. A COP of 5 means 1kW of electricity gives 5kW of heat. COP goes up in warm air and down in cold air. The Aquark Mr Silence 7kW has a COP of 14.0 to 7.1 in 27°C air and 7.2 to 4.4 in 15°C air, and our 7kW Wi-Fi model reaches up to 12.9.
A 7kW heat pump suits most hot tubs. The Aquark Mr Silence 7kW is made for spas and pools of 15 to 30 cubic metres. For a swim spa or a large hot tub, choose 11 or 12kW: the Outdoor Living 12kW gives up to 12.5kW of heat, and the Aquark Mr Silence 11kW suits 30 to 55 cubic metres.
Yes. The Outdoor Living 7kW works in air down to -7°C with automatic defrost. The Outdoor Living 12kW has a bottom plate heater to stop ice building up and works down to -14°C, or -12°C on the Wi-Fi model. The Aquark Mr Silence works from -10°C to 43°C.
The Outdoor Living 7kW runs at 54 dB(A) and the 12kW at 55 dB(A). The Aquark Mr Silence starts at just 36.5 dB(A), about as quiet as a fridge, and slows to a quieter mode as the water gets close to temperature.
Yes, the Outdoor Living heat pumps have a cooling mode. Switch it on in a heatwave and the 7kW can bring the water down to 8°C, so your hot tub becomes a cool plunge.
The heat pump sits outside next to your hot tub or swim spa and connects into its pipework, with 50mm water connections on the Outdoor Living models. It runs on a single phase 220 to 240V supply: 8A at most on the Outdoor Living 7kW and 13A on the 12kW Wi-Fi. The installation manual covers where to put it, the pipe connections and the power supply, and a qualified electrician should connect the power.
Our heat pumps come with kerbside delivery for £25, in 1 to 2 days.
Outdoor Living heat pumps come with a 1 year warranty, and Aquark heat pumps with a 2 year warranty.
Check the dimensions, seating and features on each product page before you order.