Analysis of occupant behaviour in the use of air-conditioners in public buildings in developing countries: evidence from Ghana

Abstract

PurposeThe use of air-conditioners (ACs) is on the increase in the developing world, with exacerbating compounding effect on carbon footprints. With this development, there is the expectation that developing countries would begin to appreciate and understand occupant behaviours in the use of ACs towards combating climate change, especially as building energy consumption is heavily influenced by the behaviour of its occupants. This study aims to identify occupant behaviours that leads to efficient use of ACs in public buildings so that these can be factored into developing guidelines for improving energy efficiency in buildings.Design/methodology/approachDrawing on the theory of planned behaviour (TPB), survey questionnaire was used to collect data in office buildings in Kumasi, Ghana. Partial least squares–structural equation modelling (PLS-SEM) analysis was employed for the analysis.FindingsSwitching on fan(s) as alternative to ACs has a path coefficient of 0.527, suggesting that it will have the most positive impact on energy consumption as far as AC use is concerned. The second occupant behaviour with a positive impact on energy consumption for AC use is opening windows for natural ventilation accounting for 0.351 significant path coefficient. Wearing of light or heavy clothing as a means of conserving energy achieved 0.174 impact coefficient while occupant behaviour of switching off ACs when leaving the room came last in the ranking, with an impact coefficient of 0.146. TBP is validated in this model, given that all the four occupant behaviours had their perceived behavioural control (PBC) having less impact on the behaviour compared to the behavioural attitude (BA) and the subjective norm (SN).Research limitations/implicationsThis research focused on public buildings used as offices, and the findings may not be applicable to private company buildings and also residential properties. Given that Ghana and, for that matter, many developing countries rely heavily on thermal plant for electricity generation, the climate change implications of the findings are discussed.Practical implicationsIt is recommended that behaviours of occupants should be considered and factored in building energy predictions to bridge the energy performance gap. Subsequently, project managers, designers and energy consultants are encouraged to provide fans and openable windows in offices, even if there is going to be an air-conditioning provisions.Originality/valueOriginality emanates from the paper being at the forefront of helping to understand occupants' behaviour in the use ACs and associated climate change implications in a developing country context. One of the new variables introduced, switching on fans as an alternative to ACs, achieved the highest path coefficient and has important implication for occupant behaviour in the use of ACs in the literature.