CHAPTER ONE 1.0 BACKGROUND OF THE STUDY 1.1 Introduction

Architecture and the advancement of technology has led to the recent influx of heavily glazed commercial buildings all over the world of which Nigeria is no exception.

The availability and the use of energy in a the building is pivotal to the building’s functionality within the confines of its purpose. However, if energy use in buildings does not control, can steadily led to costly waste to the building users and more importantly to through continuous release of greenhouse gases (GHGs) emission into the atmosphere leading to global warming and climate change (Oluwafemi,2015). Adeleke, (2010) report that the United Nations Environmental programme (UNEP) sustainable construction and Building Initiative (SCBI) noted that 30-40% of the global energy use comes from the commercial sector. This implies that achieving energy efficiency in buildings could mitigate the GHGs by 30-40%, which could have emanated from the commercial sector thereby saving the climate from the negative effect of these gases (Nwofe, 2014).

With the massive growth in new shopping malls construction coming up having front facade completely glazed in developing countries such as Nigeria and the inefficiencies of the existing building stock worldwide, if nothing is done, GHGs emissions from buildings will be more than double in the coming years (Adeleke, 2010). These makes energy efficiency in buildings to be taking seriously by the governments in the developed world ( Oluwafemi, 2015).

The major and the single most significant end use of energy in Nigerian shopping malls has been attributed to space cooling, (ECN-UNDP, 2005). Another analysis of the building energy consumption in Nigeria commercial buildings gives a result that, the building envelope design, accounts for 40% of the peak cooling load respectively (Batagarawa, 2013). The substantial contribution by cooling is an indication that targeting this end-use will provide significant energy savings.

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