Abstract: A method and system for optimizing design of a fire suppressant system for a space. The method includes: receiving system requirements defining constraints of the system; defining system parameters including required coverage of a fire suppressing agent and required flow rate of the agent based on the system requirements; searching a database of system components and selecting components able to satisfy the system requirements and provide the required coverage and flow rate; optimally combining the selected components into a system layout; representing the system layout as a three dimensional, 3D, model; performing three dimensional computational fluid dynamic, CFD, modelling on the 3D model to evaluate performance of the system layout; and determining, based on the CFD modelling, whether the system layout is an optimal design for the space.