Sustainability
The 90 Long Acre redevelopment scheme consists of a major refurbishment and extension of the existing 1980s building. The development is an 8 storey building comprising 20,988m² (NIA) of office area and 1,903m² of retail (A1,D1,D2 and SG) area located on lower ground – and upper ground floors.
The office HVAC consisting of a mixed-mode design with openable façade elements allowing for natural ventilation and cooling when available to the perimeter zones. Hot water for space heating is provided by air source heat pumps and chilled water for cooling is generated via air cooled chillers. Multi function heat recovery air source heat pumps are utilised during simultaneous heating and cooling conditions for high efficiency operation.
Saffron House was refurbished to provide 38,000ft² of high quality office accommodation. Watkins Payne supplied building services engineering which saw the 1st, 2nd and the 3rd floor including the ground floor reception of Saffron House converted into open plan office areas and reception.
The Practice was responsible for designing the complete refurbishment of the mechanical, electrical and public health services to all of the guest rooms, together with the penthouse units in The Claridge’s Hotel.
The speculative office space is fitted out to a Category A standard and will be British Council of Offices (BCO) Guide to Specification 2019 compliant. The refurbishment has adjusted the temperature control zones to pull them better in line with the BCO recommendations than currently provided.
Nash House is located on the corner of Maddox Street and St George Street in London and was constructed in 1980s. The site is right in front of the Garde I listed Church of St George and stone throw away from famous Handover Square. Currently ground floor is occupied by a retail tenant where the lower ground, 1st floor to 5th floor is office accommodation.
Watkins Payne reviewed a number of mechanical and electrical options with the team, focusing on retention of key central plant, overhaul and replacement of plant where required, and LED lighting to reduce energy and improve the office environment.