In which situation is a pleated air filter preferred over a flat filter?

A pleated air filter is preferred in situations where higher dust-holding capacity and surface area are desired due to its design and construction. Pleated filters have an increased surface area compared to flat filters, which allows them to capture more particles and contaminants from the air. The pleating creates additional surface space for filtration, meaning that they can hold more dust without getting clogged quickly.

This design enhances their ability to trap particles and extends the time between necessary replacements, making them highly effective in maintaining indoor air quality. Furthermore, the increased surface area contributes to better airflow compared to flat filters when they are properly designed, allowing them to maintain efficiency for a longer period.

In contrast, considerations related to cost, maintenance ease, or airflow restriction may make flat filters a suitable choice in different scenarios, but in terms of maximizing filtration efficiency and dust-holding capacity, pleated filters are the superior option.