The efficiency of the split-type air conditioner, which consists of indoor and outdoor units, is determined by the refrigeration cycle efficiency of its condensation, compression and evaporation processes. The key factors that affect the performance of the outdoor unit are the air flow profile and the refrigerant pressure at the compressor discharge. If the air flow rate decreases, the discharge pressure of the compressor increases. This will cause the power consumption to increase and overall efficiency to drop. One of the factors affecting the air flow profile is the installation distance between the outdoor unit and the wall. The distance of this wall gap is crucial because it affects the static pressure in the gap. This static pressure interferes with the air flow towards the outdoor unit. Therefore, the smaller the gap, the higher the static pressure and hence less air will flow through the outdoor unit. The purpose of this research is to study the air flow of a splittype outdoor air conditioner unit when it is placed near the wall and investigate its optimum placement from the wall. For the first stage of this investigation, the 3D CAD modelling of the DAIKIN outdoor unit of 5SL15F SERIES was completed using ANSYS SPACECLAIM software. The meshing was done using SnappyHexMesh code. Next, the simulation was conducted using OPENFOAM software to determine the air flow profile. The air flow profile was then inputted into the CoilDesigner software. Then, the CoilDesigner software was used to create the heat exchanger condition for the condenser and evaporator prior to transferring this condition into the VapCyc software. The VapCyc software is a refrigerant cycle programme and it was used to predict the discharge pressure at the compressor based on the obtained air flow profile. The input for the VapCyc software comprises of the specifications of the four air conditioner components, namely the condenser, evaporator, expansion device and compressor. The results show that optimum distance is at 200 mm for both x-axis and y-axis directions with 1000 mm for the zaxis. It has the highest airflow rate and lowest discharge pressure at the compressor.