MEP design for a six-storey office building featuring open-loop geothermal heating and cooling, high-efficiency fan coil systems, and intelligent building controls.
Find Out MoreClient: Land Securities Properties Limited
Jnoad Ltd was appointed as MEP Designer for the redevelopment of 40 Eastbourne Terrace, a six-storey, 9,000m² commercial office building in Paddington. The project centred on the integration of a high-efficiency open-loop geothermal heating and cooling system, designed to meet the building’s environmental and spatial constraints while delivering exceptional performance.
Our scope included full mechanical, electrical, and public health design, with particular emphasis on the geothermal system, comfort cooling, ventilation, and intelligent building controls. The system draws groundwater from the chalk aquifer via deep boreholes, using reversible heat pumps to provide low-temperature heating and chilled water. The design eliminates the need for visible external plant, reduces energy consumption by up to 40%, and supports future tenant flexibility.
All works have been successfully completed, with the building now fully operational and delivering sustainable comfort to its occupants.
Project Details & Design WinsFour 150m boreholes were installed in the rear car park, enabling groundwater abstraction and reinjection. The system uses plate heat exchangers and reversible heat pumps to deliver simultaneous heating and cooling with COPs up to 6.0—achieving ~40% energy savings compared to conventional systems.
A four-pipe fan coil unit system provides zoned comfort across office floors, atrium, and entrance hall. Units are low-profile, damper-controlled, and integrated with ceiling lighting for discreet air distribution. Perimeter zoning and tenant-ready connections support flexible occupancy.
Fresh air is supplied via central AHUs with staged filtration, frost protection, and reheat coils. Exhaust air is extracted through risers and roof-mounted fans with variable speed control. Dedicated toilet ventilation systems ensure hygiene and comfort across all cores.
A new Building Management System (BMS) provides full automation and monitoring of HVAC systems. Borehole water is treated and used for domestic supply, reducing reliance on mains water. Cold and hot water services, drainage, and rainwater systems were fully upgraded to support long-term building performance.
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