Abstract
Recently, there is an interest about Green Buildings and Low-Carbon Design in architecture. The Korean government is expected to prepares a policy for reducing green house gases. Also, energy consumption in building increases continuously as a demand for comfort and convenience have increased recognition of change in building. For this reason, the field of architecture is searching for energy reduction program that uses energy saving building materials and new regeneration energy. But a study of design methods for energy saving is lacking. Therefore, this research defines factors that effect the energy performance in buildings, especially in the view of the window to wall ratio which greatly influences heating and cooling loads. The window to wall ratio highly influences energy saving at the early design stage. The research compares and analyzes the window to wall ratio on each type of building mass. It proposes a basis for deduction of resonable office tower's window areas by using a result value from each type of building mass and floor area. The proposed results on window to wall ratio will help in energy reduction at design stages.
