Real projects
real results
Geothermal is already the preferred energy source for many organisations. From airports to hospitals, industrial facilities and residential developments. We design and deliver underground energy systems that cut emissions, reduce costs, and keep operations resilient. Explore how different clients solved complex energy challenges with permanent, low-risk infrastructure.
Cavan General Hospital
Hybrid geothermal system delivering 600 kW for resilient, low-carbon energy at Cavan General Hospital.
Dublin Airport
Feasibility study showing 51% Scope 1 emissions cut with thermal energy storage.
Trinity College Rubrics
21-borehole system delivering renewable heat for a protected heritage building.
Confidential UK Pharmaceutical site
Thermal energy storage providing 190 kW heating and free cooling for net-zero labs.
Cavan General Hospital
Emergency Department
The expansion of the Cavan General Hospital site includes a new 68,000 m² Emergency Department building. Relying on other heating and cooling solutions would deliver higher operational costs, limited resilience and higher carbon emissions.
The solution
A hybrid geothermal energy system designed to meet the hospital’s long-term needs. At its core is a thermal energy storage capable of delivering 640 kW of heating and free cooling, addressing 95% of the building’s demand. To ensure resilience and flexibility, the system integrates a groundwater-based water-to-water solution that provides additional capacity.
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Installed capacity: 600 kW (heating and cooling)
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Hybrid thermal energy storage and groundwater-based solution
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Continuous operational monitoring
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Long-term maintenance for sustained performance
Dublin Airport Authority
Feasibility Study
With a target to reduce Scope 1 emissions by 51% by 2030, the feasibility study at daa explored how low-carbon heating and cooling could be delivered efficiently across the airport campus. The feasibility study identified how a geothermal system could outperform conventional heat pumps in both performance and sustainability.
The solution
We designed a geothermal energy storage system capable of providing low carbon space heating and free cooling, that reduces electrical consumption and MIC requirements. The study assessed the existing infrastructure and developed the optimal design to achieve and exceed daa’s Scope 1 emission reduction target by 2030. The approach demonstrated the technical and financial advantages of integrating geothermal energy within large, complex sites.
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51% Scope 1 emissions reduction potential by 2030
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Significantly lower MIC and electrical demand than air source alternatives
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Scalable thermal energy storage design for campus-wide integration
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Enhanced resilience and long-term operational efficiency
25%
exceeding of 2030 Scope 1 Target
€656k
of estimated annual energy savings
6,625
estimated tonnes reduction of CO₂ emissions
Trinity College
The Rubrics
The Rubrics is the oldest building on the Trinity College Dublin campus, completed between 1699 and 1705 and designated as a Protected Structure and Recorded Monument. The 2022 deep retrofit sought to improve efficiency while preserving the building’s historical integrity. Traditional retrofit methods were unsuitable, requiring an innovative approach that balanced energy efficiency with conservation.
The solution
We delivered a full design, build, and maintenance solution using a geothermal system tailored to the Rubrics’ heritage context. The design included 21 boreholes beneath the new square and an underground plant room, ensuring minimal visual and environmental impact. The system provides 425 MWh of space heating and domestic hot water annually, integrating seamlessly with the historic surroundings.
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425 MWh annual renewable energy output
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21 boreholes and underground plant room for minimal visual impact
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Complete design–build–maintain service
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Energy efficiency aligned with heritage preservation
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Long-term, low-maintenance performance
425
MWh of renewable heat & hot water annually
Low-impact
underground design preserving the building’s historic character
21
borehole underground geothermal system
Confidential UK Pharmaceutical site
This pharmaceutical site required a new net-zero research facility designed for precision climate control and sustainability. The project aimed to embed low-carbon heating and cooling within the building footprint to support temperature-controlled laboratory operations.
The solution
We engineered and installed a thermal energy storage system comprising 20 boreholes located beneath the building slab. The system delivers 190 kW of free cooling through radiant ceiling panels, along with space heating for year-round comfort and performance. This integrated approach supports the client’s net-zero objectives while reducing operational energy demand.
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190 kW capacity providing heating and free cooling
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20 boreholes installed beneath building footprint
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Supports temperature-controlled research environments
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Reduced energy consumption through radiant cooling design
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Enables net-zero operational performance
20
borehole thermal energy storage system installed beneath the building footprint
190 kW
of heating and free cooling delivered to research spaces
Integrated
design supporting the client’s net-zero operational goals
Michael White
Chief Executive Officer
