It is usual for energy consumption in accordance with facing and sitting direction of towertype
apartments to be calculated by the official statistics or computer simulation. Previous
studies for energy consumption appear to be very limited due to the dependence on flat type of
apartment. Acknowledging these constraints, an empirical study for a tower type apartment
was conducted to demonstrate how a on-site indoor temperature measurement in spring can be
used to assist in estimating the total energy consumption in terms of facing and sitting
orientation specific settings. The results indicate that maximum temperature difference in
spring was identified as 1.16℃ between south and eastern direction. It is known that raising 1℃
indoor temperature require 7% more energy consumption than normal. The 1.16℃ difference
means that sitting direction of tower type apartment is a crucial explanatory variable as unit of
analysis for energy consumption. It was demonstrated that the indoor temperature could be
used effectively as an indicator to estimate energy consumption among various sitting direction
of tower type apartments. It is anticipated that this research output could be used as a valuable
reference to support more scientific and objective decision-making for facing and sitting
orientation of tower type apartments.