According to the IPMC, what is the minimum mesh per inch for screens on windows used for ventilation in habitable rooms?

The correct answer regarding the minimum mesh size for screens on windows used for ventilation in habitable rooms is based on the provisions set forth in the International Property Maintenance Code (IPMC). Specifically, the code specifies that window screens must have a minimum mesh size of 16 holes per inch. This is to ensure effective ventilation while preventing small insects from entering the living space.

A mesh size of 16 per inch strikes a balance between providing adequate airflow for ventilation needs and maintaining structural integrity to keep out unwanted pests. This guideline helps maintain a healthy living environment in habitable rooms, ensuring occupants can benefit from fresh air while minimizing their exposure to outdoor nuisances.

Other mesh sizes indicated in the choices, such as 14, 18, or 20, do not meet the specified requirements of the IPMC for effective ventilation window screens and may either allow more pests or restrict airflow too much, thus failing to satisfy the code's primary safety and health objectives.