Screen mesh is defined by the number of openings per inch. For example, a mesh described as 18/14 signifies that there are 18 openings per inch in one direction and 14 openings per inch in the other. This measurement is a key factor determining the size of particles or insects the screen can block, directly affecting airflow and visibility.
The choice between different mesh sizes impacts ventilation, clarity of view, and pest control effectiveness. Historically, coarser meshes were prevalent, offering high airflow but limited insect protection. Finer meshes provide better insect barriers but can reduce air circulation. The selection of appropriate mesh balances these factors based on specific environmental needs and desired performance characteristics.