ABSTRACT
Designers and clients alike are now emphasizing on how to make their buildings green. Construction sector is one of the largest end users of environmental resources. Moreover, it is also one of the largest polluters of manmade and natural environment around the world. During the past years, green building has rapidly growth. Several rating systems developed as assessment tools to measure the sustainability level of green buildings. Currently, they are dealing with innovative ways to implement energy efficient in new buildings. From past researches, building energy efficiency is become more important as it is highly contributed in global warming. Furthermore, in green building rating system, energy and indoor environmental quality are the top two category that contributed into the credit points. This is express how important these two categories in overall rating system. In this research, the main concern is in the tropical area office buildings, especially in Indonesia, Malaysia and Vietnam.
The objective in this study is to compare different rating systems used in tropical area in terms of energy and indoor environmental quality. The differences and similarities will be presented to give better understanding about rating systems in tropical area based on their credit points, requirement and material or facilities to be used.

ABSTRACT
Designers and clients alike are now emphasizing on how to make their buildings green. Construction sector is one of the largest end users of environmental resources. Moreover, it is also one of the largest polluters of manmade and natural environment around the world. During the past years, green building has rapidly growth. Several rating systems developed as assessment tools to measure the sustainability level of green buildings. Currently, they are dealing with innovative ways to implement energy efficient in new buildings. From past researches, building energy efficiency is become more important as it is highly contributed in global warming. Furthermore, in green building rating system, energy and indoor environmental quality are the top two category that contributed into the credit points. This is express how important these two categories in overall rating system. In this research, the main concern is in the tropical area office buildings, especially in Indonesia, Malaysia and Vietnam.
The objective in this study is to compare different rating systems used in tropical area in terms of energy and indoor environmental quality. The differences and similarities will be presented to give better understanding about rating systems in tropical area based on their credit points, requirement and material or facilities to be used.

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