1 Basighall, London.
At a glance
- Project value – c. £30M
- 207,000 sq.ft. Office
- Client – Leonari
- Decarbonisation Scheme
- NABERS compliant
- Design and Projects
- Refurbishment
- Detailed Design

Project brief
Eteria was appointed to develop a full Stage 4 design for the decarbonisation of the air conditioning and heating at this large commercial office building in central London. The client provided an initial concept design, which Eteria took forward to detailed design. The brief centred on delivering a future-proof, low-carbon strategy that would significantly reduce the building’s reliance on fossil fuels and align with net zero targets. Key elements of the scope included high-efficiency air handling units with heat recovery, the installation of roof-mounted air and water heat pumps, integration of buffer vessels, replacement of common area fan coil units, and the design of a new high-specification reception.
Challenges
Results
Eteria successfully delivered a fully coordinated Stage 4 design that ticked all the right boxes. The design has in principle offered a reduced operational carbon, enhanced the building’s environmental credentials, and set a clear path for full electrification of the site.
By taking a collaborative approach, the project team delivered a robust strategy that met the client’s objectives and future proofed the asset towards a Net Zero milestone.




We are focused on applying practical, forward-thinking technologies to improve the efficiency and sustainability of assets and their operations. Our goal is to support carbon reduction by using innovation blended with traditional practices to ensure a robust solution.