Quality of indoor environment for a building is determined by several factors. One of the factors is appropriate noise level. It is advised that noise level is maintained as low as possible. This is because lower noise levels will provide lesser disturbances to the occupants and hence improve indoor environment quality. Also, it is advised to prevent any substances that can pollute the air to maintain a healthy indoor environment. In the circumstances of indoor environment, the pollutant originates from VOC paints and the use of adhesives. The use of low VOC paint and environmentally friendly adhesives can reduce the indoor air pollutant levels. Apart from that, a good location for waste disposals can improve air quality by preventing any unpleasant odors. The other element for good indoor environmental quality in a building is by providing adequate ventilation for wet areas which includes areas such as bathroom, kitchen and laundries. Proper ventilation at these areas could avoid reproduction of mold and fungus. Considerations about visual satisfaction at workplaces such as offices, classrooms and training rooms must be made. It is also recommended that the use of high frequency ballasts in fluorescent light fixtures can improve the workplace lighting quality. This is because flickering causes discomfort among workers but it can be avoided by using high frequency ballast lighting. The Department of Safety and Health (DOSH) in Malaysia has set some parameters in their guidelines that need consideration in order to have proper indoor air quality. Examples of these parameters includes the level of Carbon Monoxide, formaldehyde, ozone, total volatile organic compound etc. Good quality indoor environment will result in optimum performance from the occupants.