The projection screens are available in three sizes (width): 2.0m, 2.5m and 3.0m. The space required for the projectionscreen is (width x length) screenwidth + 0.5m x screenwidth. All screens require a room height of at least 2.2m (~ 7.22 ft) Example: For a Ultimmersion//180 2.0m you would need a room size of at least 2.5m x 2.0m x 2.2m. Please note that this does not include your simulator hardware.