Establish Energy Efficiency with Shallow Geothermal

Since 1996, Groenholland Ge0 Energy Systems has been active as a consultancy in the field of Borehole Thermal Energy Storage (BTES). A ground-coupled heat pump saves energy for heating and cooling. Also it is a solution with little to no greenhouse gas emissions!



Groenholland Ltd. is a ground source specialist company incorporated in the U.K. since 2001. Over the last twenty years we have provided design & build services to numerous projects using closed loop ground source heat pump systems. In total we have been involved in over 250 shallow geothermal projects from private estates to large scale development. Borehole Thermal Energy Storage (BTES) is our expertise!




Closed-loop ground source energy systems utilise energy from the ground, not only for heating but also for cooling.     Do you have plans or ideas regarding sustainable heating and cooling? It might be helpful to discuss the feasibility and practicability first with an expert. Reach out to us via our contact page. Groenholland Geo Energy Systems is a pioneering geothermal company since 1996 and it is in our culture to help!


Integrated Design

In the design of a neighborhood or clusters of homes, an integrated design of ground energy systems ensures operational reliability for the end user. The coordination between the existing ground energy systems and the harmonisation of design parameters guarantee optimal performance even in the long term. At Groenholland we use proprietary and validated software that help designers to design for long term efficiency. 



With the specially developed ITGBES tool by Groenholland, you can calculate the thermal interactions between borehole heat exchangers. This is crucial for the optimal operation of ground source energy in phased and complex construction projects. All types of ground source energy systems can influence each other’s. We also offer a premium version for more complex situations with ITGBES-PRO.



Public authorities should organise the preconditions to make shallow geothermal energy a success. In the Netherlands municipalities take the lead to orchestrates the implementation of ground-coupled heat pump systems on a local scale with specific policy guidance. In that way municipalities set the rules to facilitate the efficient and sustainable use of ground energy, also for future users! 


Quality & Training

To ensure quality within ground source energy, certification is essential. In The Netherlands certification is required for designers, drilling companies, and installers. In the United Kingdom, where we have been active since 2001,  Groenholland is ISO 9001 and MCS certified. For our advice and implementation in design and engineering Groenholland has a (PI) professional indemnity insurance. 


Reference projects

Over the past twenty years, 75,000 ground-coupled heat pump systems have been installed in the Netherlands. Currently, 15,000 systems are added each year. In the United Kingdom we are active in individual residental homes, public buildings (schools and hospitals) and in academia. Check out our reference projects for successful case studies with shallow geothermal energy!


Our community

Groenholland Geo Energy Systems has a wide and diverse network within ground source energy, including within the academic world (we publish peer-review publications). Also we are an active member of the European geothermal community. Interested in knowing who is active nationally and internationally, what they do, and what knowledge and contacts they possess? Send us a message!

Our Reference Projects with Shallow Geothermal Energy

Our projects vary widely in nature, but they share the commonality of utilising vertical ground heat exchangers in a sustainable manner. With over a hundred projects in the field of geo-energy, we present here a selection of more recent activities that we have supported!

Case Studies

Groenholland U.K. is an independent sister company of Groenholland NL. The focus in the U.K. is on design and build systems, some reference projects are: 

  • 2002 St Lukes Church (London Symphony Orchestra), heat pump system renovated in 2020.
  • 2012 World Wildlife Fund (WWF) headquarters Woking
  • 2020 City University Londen Law faculty
Aardgasvrij kantoor


An example from the Netherlands is the “Schoenmakershoek” neighborhood in the municipality of Etten-Leur in the Province of Brabant.                   

This gas-free residential area was built between 2004 and 2010, featuring around 1500 homes, each equipped with its own heat pump with the ground as the source.  Now it is 2024 and current residents don’t have to worry about higher gas prices. 

Aardgasvrije wijk in Haarlem

The context

A heat pump with a closed-loop ground energy system (a so-called ground heat exchanger) guarantees high energy efficiency. Ground source heat pumps are economically attractive due to their energy saving, low maintenance requirements, and their very long life span. Another significant financial advantage is that a well-designed ground energy system uses relatively less electricity compared to an ASHP, which can help alliviate the electricity grid.