Ground Source Heat Pump, Cotswold Energy Group
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Chalford Gate, London Road, Chalford, Gloucestershire, GL6 8HN


0333 444 5 444

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Renewable heating for your home using Government subsidies

Is it suitable for you?

If you have a property with garden, paddocks or fields you can make significant savings on your heating bills and in most cases you won't have to pay a penny. 

Create savings with our Self-Funding Heat Pumps

Using our finance partner we work to mirror your income from the government subsidy to match your monthly finance payments for your new Ground Source Heat Pump. 


The result is a brand new, self-funding Ground Source Heat Pump that could create savings from the day it is installed. 

Ground Source Heat Pump, Cotswold Energy Group

The Process

Follow the simple four stage process...

It starts with a survey

All heat pump systems are unique and will be designed according to your individual needs. Most heat pumps are permitted development so you won't need planning permission and you can benefit from renewable energy straight away.

All about design

When the survey is completed we'll design a system and a scope of works that is tailored to you - rest assured that Cotswold Energy Group are the leading heat pump installer and design consultants. We analyse ground temperatures and design a system that will extract heat efficiently.

Show me the money

Homeowners are eligible for government subsidy, when we have completed your design we will explain how much money you can earn from your new system and what the expected running costs will be. Heat pumps use electrical energy to run and we will explain how this will affect your utility bills.

Press the button

Once you're ready to go we'll finalise the paperwork, agree an installation date and you can put your feet up and leave the rest to us. We'll recommend a system with the best coefficient of performance so that efficient space heating is as cost effective as possible.

The Principle 

Heat from the ground is absorbed at low temperatures into a fluid inside a loop of pipe which is buried underground. 


Fluid passes through a compressor that raises it to a higher temperature, which will heat water for the heating and hot water circuits of the house.


Cooled ground-loop fluid passes back into the ground where it absorbs further energy from the ground in a continuous process as long as heating is required.


More information can be found here.



Ground Source Heat Pump, Cotswold Energy Group

Trench or Bore holes?


One of the first decisions is whether to dig a horizontal trench or use a vertical borehole to bury the equipment that will perform the ground heat exchange. Boreholes tend to be slightly more expensive but are a very good option when space is limited and it's safe to go straight down. 

Location, Location, Location

It's important that you have a suitable space for your plant room. We need somewhere out of the way that provides a sensible junction point for plumbing, electricity, water tank and pumps.


Is your current plumbing suitable?

During the survey we check compatibility with your current plant, plumbing and heat distribution system and will test, certify and reuse anything that is suitable to keep your costs down.



Total Control

We design a heating control system that suits your needs. If you want something hi-tech and controlled by an app, we're ready for you. If you prefer a panel on the wall we'll teach you how to use it and support you in the future

The Benefits

One of the main benefits of heat pumps is that they are extremely efficient, require very little maintenance and a manufacturer's confirmed life expectancy of 20 years means ground source heat pumps are quiet and efficient with very few maintenance requirements. Ground source heat pumps can be installed in existing properties as well as larger homes, new builds and business/community premises and provide heating and hot water throughout the year.

How Does It Work?

A Ground Source Heat Pump is based on the principle of heat transfer. Heat transfer uses a small amount of energy to transfer low grade heat from the air to high grade heat, suitable for heating water to high temperatures – essentially transferring heat from a ‘free heat source’ like the air to a ‘heat sink’ like your home. This is a similar operation to a refrigerator – but in reverse and it uses a process known as the vapour compression cycle.

Coefficient of Performance (COP)

Coefficient of performance (COP) for a heat pump is defined as the useful heat energy output divided by the electrical energy consumed. Another way to look at this is how many kW of heat are produced by inputting 1kW of electricity into a heat pump.

The average COP for a Ground Source Heat Pump, over a full year is roughly 3.75, i.e. an efficiency of 375%, compared to an 10 year old oil boiler, where efficiency could be assumed at 85%.

To produce meaningful figures and usage estimates, we use geographical weather data specific to your location. We also assess your property via approved heat loss calculations, considering the specifics of your building such as the number of external walls and the level of insulation currently installed.

Life-cycle of a Heat Pump

Benefits of installing a Ground Source Heat Pump system continue beyond the 7 years of the subsidies from the Renewable Heat Incentive Scheme.

One of the major benefits of opting for a renewable source such as a heat pump is that the financial benefit extends long beyond the duration of the Renewable Heat Incentive. A well-maintained heat pump is expected to have a lifetime of up to 20 years when installed and serviced properly by a leading renewables installer such as Cotswold Energy Group.

Research suggests that traditional fossil fuel boilers (such as gas and oil) have an average lifespan of 12 years, meaning that in the lifetime of your new renewable heat pump you will benefit from:

• 7 years of RHI payments from the UK Government (20 years if non-domestic).

• A system that (if maintained) will be expected to last for 20 years.

• Saving the cost of at least one fossil fuel boiler replacement.

• Cutting your personal carbon emissions.

• Contributing positively to climate change.