Comparison of Building Envelope Models to Illuminance Level in Phinisi Tower Building

The hyperbolic parabolic facade is the appearance of a Phinisi Tower Building. The building facade characterizes this building and is also the aesthetic value of this building. Building facade models are increasingly developing, but need to pay attention to their association with visual for space users. Visual comfort is related to the standardization of the level of illuminance, which has been recommended by Indonesia National Standards. Quantitative research methods that used describe data measurement results in the workspace, which are directly related to the opening of the building envelope. The level of illuminance measurements are carried out in the workspace and in open areas in medium sky conditions. The results of the study are that the level of illuminance in the workspace is very different, because of the different facade models. vertical and horizontal strip facade models have a higher level of illuminance than the hyperbolic parabolic facade, whereas in spaces that do not use a facade but shaded by sunscreen are the highest. The results of the study concluded the building facade model influence of the level of illuminance in the workspace. The contribution of this research can be a guide in designing the facade shape of buildings, by paying attention to the distribution of lighting into the space, so that it can reduce the use of energy in terms of lighting and can create energy efficient building designs.