Boogertman + Partners are proud to announce that the new head office project for the Department of Environmental Affairs in the City of Tshwane has been awarded a Six-Star Green Star SA Office Design V1 rating by the Green Building Council of South Africa (GBCSA).
Although the DEA had set their target high in terms of the energy usage of the building, capping the permissible annual energy consumption at 115kWh/m²/annum, the contractual requirement was only to provide a four-star green rating. Through a holistic and team-oriented approach the six-star rating has proven that a greener building does not have to cost more.
Key contributing factors to this fantastic result have been the extensive use of renewable energy, optimised mechanical and electrical systems design and harvesting of sunlight and rainwater. Getting the basics right, such as orientation, shading and the iterative optimisation of the design, was pivotal in achieving the final outcome.
In addition to this the building envelope has been designed to international standards of insulation and glazing, including a thermally broken, double-glazed curtain wall system, designed specifically for this project.
The extensive use of Building Information Modelling (BIM) and a considerable amount of daylight and energy modelling have gone in to proving and refining the design through an approach of iterative optimisation.
Although only one of many green building projects with which Boogertman + Partners are currently involved, this is its first six-star-rated building and the largest one in South Africa to date, with a lettable area of 27 422m².
Boogertman + Partners is a Gold Founding Member of the GBCSA and this project is truly an example of the practice’s sustainable ethos, setting the bar high for both current and future projects.