CASE STUDY | EDENICA OFFICE Edenicas faade is assembled from precast concrete panels, made using recycled concrete A mixed-mode air conditioning strategy will help to minimise operational energy use MATERIAL ASSETS Edenicas new all-electric office building in London is a pilot for the use of material passports. Waterman Building Services Mark Terndrup and Anastasia Stella give details of how the scheme has been designed T he ambitious brief for the new Edenica office building was to push the boundaries of sustainability. The design for the 13,000m2 scheme, located in Fetter Lane in the City of London, has done just that, with a progressive approach to pioneering new sustainability standards for speculative office developments in the capital. Waterman Building Services the schemes building services, structural and sustainability engineers produced a design for developers BauMont Real Estate Capital and YardNine that minimises operational and embedded carbon. It also promotes the re-use of materials in its construction by pioneering the adoption of materials passports. Designed to be all-electric, Edenica is predicted to use half the operational energy of a Building Regulations minimum-compliant building. It is Breeam Outstanding, WiredScore Platinum (see boxout, WiredScore certification), UK 24 November 2023 www.cibsejournal.com Green Building Council net zero compliant for construction, and is set to be Nabersrated once occupied. Waterman was able push the sustainability boundaries so effectively because the consultant worked closely with Fletcher Priest Architects from the outset. One of the early decisions was to design the envelope of the 12-storey building (plus basement) so it could accommodate a mixedmode air conditioning strategy, to help minimise operational energy. As such, the faade incorporates automated hopper windows at high level on each of the 3.4m-high floor plates. When conditions are right, the high-level windows will open automatically, which is a clue to the occupants that the building is in natural vent mode, says Mark Terndrup, managing director of Waterman Building Services South. The faade also features mid-level, manually openable windows with an insulated spandrel panel at low-level to improve thermal performance.