How EDC Delivered a High-Performance Energy Retrofit for Clayton Hotels

Project Overview:

EDC were recently engaged to produce a decarbonisation report for Clayton Hotel, Lapps Quay, Cork. This included identifying possible solutions for reducing carbon dioxide (CO₂) emissions currently generated from the building’s energy systems.

We carried out M&E visual surveys to inspect existing systems and assess possible solutions. A desktop feasibility study was then undertaken, exploring low- and zero-carbon technologies through dynamic simulation, considering multiple options ranging from building fabric upgrades to M&E systems.

EDC also collaborated closely with the Energy Efficient Design Expert (EED) to establish the current baseline, prepare Energy Service requirements, and contribute to the Action and Opportunities element of the project. Liaison with the EED continued during the detailed design stage to ensure all requirements were met.

The development is an active hotel with approximately 197 bedrooms, a leisure complex, a conference suite, and dining facilities, located at Lapps Quay, Cork City.

Core Challenges

• Fossil Fuel Dependency: The hotel currently relies on natural gas boilers. Transitioning away from this infrastructure presents both technical and financial hurdles.

Innovative Solutions

• Hybrid VRF Condensers and Electric Air Source Heat Pumps (ASHPs): Proposed as a low-carbon, energy-efficient alternative to gas boilers. These systems extract heat from the outside air and can provide both heating and cooling.
• Advantages of HVRF Condensers and ASHPs: Can be powered by renewable electricity, further reducing carbon footprint. Lower long-term operating costs compared to gas. Eligible for green financing and grant support.

Innovation at the Core

EDC’s approach to this energy retrofit goes far beyond equipment replacement. It’s a fully integrated, data-led strategy grounded in engineering innovation and sustainability-first thinking.

Through advanced energy modelling and scenario analysis, we assessed the hotel’s entire energy profile, identified inefficiencies, and unlocked targeted opportunities for carbon reduction. Using tools such as dynamic simulation modelling, decarbonisation strategies, Part L assessments, and NZEB alignment, we forecasted performance, optimised load profiles, and developed tailored interventions to meet both operational needs and long-term ESG goals.

By working with live occupancy profiles, we ensured accurate performance predictions while minimising disruption to operations.

Our ability to integrate renewable-ready technologies and coordinate across disciplines has allowed us to deliver a retrofit solution that is both technically robust and should provide tangible insights to the hotel group’s wider portfolio, a clear demonstration of EDC’s ability to drive meaningful change in the hospitality sector.

1. Significant Reduction in Energy Usage: Upgrading building systems and implementing energy-efficient technologies leads to lower energy consumption, reducing dependency on fossil fuels and improving operational efficiency.
2. Lower Operational and Utility Costs: Energy-efficient upgrades result in reduced utility bills, allowing for long-term cost savings and improved profit margins for the business.
3. Reputation & Market Demand: Many clients, tour operators, and booking platforms such as Booking.com and Expedia are increasingly prioritising sustainable hotels, favouring those with strong environmental credentials. This not only drives bookings but also positions eco-conscious hotels as more competitive and attractive in the global marketplace.
4. Positive Environmental Impact: Energy retrofits contribute to lower carbon emissions, supporting global and national goals for climate neutrality by 2050.
5. Enhanced Reputation and Marketability: Hotels that are environmentally conscious can attract eco-conscious guests and corporate clients.