TAF PUBLISHING

As global warming becomes more substantial, office buildings in Malaysia widely use air conditioning as an active design solution to cool the building. However, thermal comfort is often a problem in many offices using a centralized air conditioner where occupants complain that the indoor climate is too cold. The overcooling effect is a result of over-specification of air conditioning systems, which lead to in-efficient energy consumption and thermal discomfort. This paper identifies and explains the underlying causes of over-specification of air conditioning systems. The investigation focuses on understanding the factors affecting active design decisions. A total of 39 construction consultants participated in face-to-face interviews that were conducted in individual and group meetings. Research findings revealed that the problem could be attributed to the practice of quick solutions, resistance from design consultants, a 'bigger is better' mentality, unsupportive fee structures, and poor testing and commissioning practices. The highest contributing factor is the resistance of design consultants to change and consider new solutions that break away from customary practices. The research findings provide useful information to policy makers regarding the over-cooling phenomenon in Malaysia and highlight the importance of energy efficient regulations to be imposed.