Best Ground Source Heat Pump Manufacturers

Best Ground Source Heat Pump Manufacturers

If you’re looking for a highly efficient way of heating your home, then look no further than a ground source heat pump. They’ll extract heat from the earth using underground pipes which can then be used to heat the home and provide hot water.

Before installing a ground source heat pump system, it’s worth making a note of the different manufacturers and comparing what each one has to offer. We’ve taken a look at the performance of some of the most popular models on the market to help you find the best one for your home.

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Ground Source Heat Pump Manufacturers

How ground source heat pumps work in largely the same way but there’s an ever growing number of models appearing on the market, each with their own benefits to offer. In the table below, we’ve compared some of the key information about popular ground source heat pump models side-by-side.

Manufacturer Model Available Outputs (kW) ErP Energy Efficiency Rating Potential Price
Vaillant geoTHERM 22, 30, 38, 46 A++ £8,000 – £12,000
Viessman Vitocal 222-G 6.1 – 10.0 A++ £6,000 – £7,500
Nibe Nibe F1145 5 – 17 A+++(17kW – A++) £9,000 – £10,000
Kensa Evo 7, 9, 13, 17 A++ £8,000 – £12,000
Worcester-Bosch Greenstore 6 System 6, 7, 9, 11 A+ £4,500 – £8,000

The above prices are estimates but many ground source heat pumps tend to cost £8,000 to £12,000. This may sound like a significant upfront investment but when you consider that they’ll last for many years and you could be saving £400 – £800 a year on heating bills, they’re a wise investment. There are many other benefits of ground source heat pumps including Renewable Heat Incentive payments which will help provide a return on your investment.

You’ll also need to consider the cost of installation which will vary from installer to installer so to ensure you find the best deal, we highly recommend getting quotes from at least 3 installers.


The geoTHERM heat pump is an appliance capable of heating your home and reducing your energy bills. It’s also received a Quiet Mark award as it’s among the quietest ground source heat pumps available.

The unit boasts an LED display which you can use to see exactly how much energy is being extracted from the ground, which helps to give an idea of how well the system is working.

A parts and labour warranty of up to 7 years is available when installed by one of Vaillant’s renewable partners. As well as this, there’s a 10 year warranty on the heat pump compressor, to give you that extra peace of mind.

Vaillant have a second ground source heat pump available called the flexoTHERM, which can also be an air source heat pump or a water source heat pump too, making it an incredibly diverse appliance.

To get the best out of these appliances, your home needs to be well insulated and also have a low heat loss. To find the perfect model for your home, a Vaillant Installer will be able to carry out a heat loss calculation on your home.


Designed for detached homes, the Vitocal 222-G is a very compact floor-standing unit that won’t take up too much space and will also operate quietly. The system features flow temperatures of up to 60°C which means that it can be used with conventional radiators.

This model even has an integrated 170 litre domestic hot water cylinder that’s heated by an internal indirect coil. By adding on the Viessmann NC-Box, the natural cooling function can make your home cooler on a hot summer day by using cool temperatures from underground.

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The Nibe F1145 has been designed to supply cost efficient and environmentally friendly heating to homes. They feature an integrated immersion heater, circulation pumps and a control system.

Suitable for connecting to low temperature heat distribution systems such as radiators, convectors or underfloor heating, it’s also compatible with several other accessories such as hot water heaters and pools.

The system comes with a parts and labour warranty of either 24 months from the date of installation or 33 months from the date of manufacture, whichever is the shortest.


Kensa manufacture a wide range of ground source heat pumps and the Evo is their most efficient to date.

The appliance can run hot water at 60°C, is quiet in operation and features the Genesis System Manager which shows a ‘live’ Coefficient of Performance (CoP) readout to ensure optimal system efficiency and is exclusive to Kensa appliances.

The Evo features a warranty of 5 years for the heat pump unit and 2 years for the controller, water pump and internals.


The Greenstore 6 System ground source heat pump allows a flow temperature of up to 65ºC which means that it can be combined with radiators. Although this is possible, they run more efficiently at lower temperatures.

The Greenstore range of heat pumps come with a 2 year warranty that covers faulty material or manufacture but is subject to their terms and conditions.

Which is the Best Ground Source Heat Pump?

All of the models in this comparison are highly efficient, as ground source heat pumps should be seeing as they take energy from a renewable source.

If you’re looking for a ground source heat pump that will not only heat your home but your water too, then the Vitocal 222-G could be a worthwhile investment thanks to having an integrated hot water cylinder. With this system you’ll also benefit in the summer as it can not only extract the warm underground temperatures but the cooler temperatures too.

If you don’t want to invest in a ground source heat pump without a lengthy warranty then look no further than Vaillant’s geoTHERM which comes with a parts and labour warranty of up to 7 years.

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