SE combines fire safety, natural ventilation and energy efficiency at new DEA HQ building in Pretoria, SA

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One of South Africa’s most energy efficient and innovative buildings is using precision actuators and controls from Durban and Johannesburg based SE Controls Africa to ensure the natural ventilation and smoke control system operates effectively at the Department of Environmental Affairs’(DEA) new head office in Pretoria.

Designed by architects Boogertman& Partners, the DEAis the first government building in South Africa to be awarded a 6 Star Green rating from the Green Building Council of South Africa (GBCSA). It alsoachieved the highest score for a large commercial office space of this scale, due to the highly energy efficient sustainable design and the extensive use of ‘green’ technologies.

The three-storey head office provides more than 27,000 m² of floor space and uses solar shading, water recycling and extensive photo-voltaic arrays in the north car park and on the roof, which provide more than 10% of the building’s annual energy load. An energy efficient mixed mode natural ventilation systemis also installed to manage indoor air quality and temperature, whichprovides a comfortable working environment for staff.

The building’s internal space is separated into several self-contained ‘pods’ each of which is naturally ventilated by atrium vents and automatically opening windows, which are operated by

104 SE Controls’ SECO N 24 40 600mm stroke length chain actuators and controlled by 20 OS2 Type 21 control panels.

SE Controls also supplied PIR sensors foreach automatically opening window to avoid the risk of finger entrapment during operation.The complete system was installed and commissioned by specialist contractor, Robertson Ventilation Industries (RVI), to ensure it met the necessary safety and environmental specifications.

The natural ventilation system, which also operates in ‘night purging’ mode to cool the building and reduce the need for artificial cooling during summer months, is linked to both the supplementary evaporative cooling system and the smoke control system via the central BMS.

This integrated approach not only allows the ventilation system to operate in different modes, to maintain cooling and comfort, but also provides effective smoke control to ensure escape routes are kept smoke free, if a fire should occur.

Russell Crambof SE Controls Africa, explained: “The DEA building breaks new ground in what can be achieved from an environmental management and sustainability perspective, when all of the latest green technologies are combined within a highly effective and energy efficient design.”

He added: “Natural ventilation is a highly energy efficient solution for cooling and ventilating buildings to maintain indoor air quality and temperatures and in the DEA building, it has proven to be a key element in it achieving such a high environmental rating from the GBCSA as part of an excellent integrated design from the architects.”

SE Controls Africa specialises in the design and supply of advanced smoke ventilation and natural ventilation solutions to meet the needs of architects, contractors, building services engineers and facilities managers worldwide.