HRL was approached by a client to conduct thermal modelling analysis of a telecommunications shelter located in outback Australia. The shelter needed to be maintained below a given temperature to protect the internal equipment. The shelter was to be cooled by a combination of ambient air flow and air conditioning to minimise electricity consumption given that the shelter was not connected to grid electricity. The client needed to understand the thermal performance of the shelter under different internal and external heat load conditions and meteorological conditions to ensure that the shelter would operate effectively across the range of expected ambient conditions. The challenge was to develop a CFD model that could accurately predict the temperatures inside the shelter and provide insights into the impact of dynamic heat loads on the shelter's thermal performance.