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This article aims to contribute to the discussion on the efficiency of two different discretization methods used as computational fluid dynamics (CFD) solvers for the simulation of natural ventilation in greenhouses. The focus is not on a general use of CFD, but rather on its specific application to simulate airflow in naturally ventilated greenhouses. After a short review of the basic model and its extensions, we compare the accuracy and computational efficiency of two simulation codes based on the Finite Element Method (FEM) and the Finite Volume Method (FVM) for two-dimensional incompressible turbulent flow in naturally ventilated greenhouses. FVM software (ANSYS/FLUENT v 6.3.) is the most frequently used CFD code in ventilation research, but few papers using FEM software (ANSYS/FLOTRAN v. 11.0) have been published. CFD simulations have been compared to experimental data for 12 cases …