... considerable economic impact (Singh, 1994b) Indoor environment The quality of the indoor environment reflects on the health, comfort and productivity of individuals in buildings The main reason ... However, The Environmental Protection Act (EPA) 1990 and the Water Resources Act 1991 consider environment and pollution The indoor air quality and the health and comfort in the workplace environment ... Construction - - airtightness and energy conservation vs ventilation for occupants and fabric" Services and controls - - thermal comfort, lighting, air conditioning, and control of indoor micro climate"...