What is a fundamental objective of installing screens on windows and doors?

The primary objective of installing screens on windows and doors is to prevent mosquito entry. Screens serve as a barrier that allows fresh air to circulate while keeping insects, particularly mosquitoes, out of the living space. This is crucial in maintaining a comfortable and healthy indoor environment, especially in areas where mosquito-borne diseases are a concern. By blocking these pests from entering homes, screens not only enhance comfort but also contribute to public health by minimizing the risk of diseases such as malaria or West Nile virus, which are transmitted by mosquitoes.

While screens can also impact factors like air circulation or help with minor noise reduction, their primary function remains focused on pest exclusion. The installation of screens is widely recognized as an effective preventive measure against insect ingress, making it the fundamental purpose of having screens on windows and doors.