What is the minimum efficiency required for demonstrated overspray filter performance?

The minimum efficiency required for demonstrated overspray filter performance is 98%. This efficiency level ensures that the filter effectively captures a significant percentage of overspray particles, which is crucial for maintaining air quality and protecting the environment in settings where such overspraying occurs, such as in paint booths or industrial applications.

A filter rated at 98% efficiency can remove a large portion of airborne particles, significantly reducing the amount of overspray that enters the environment. This level of efficiency also reflects industry standards and practices that aim to balance high performance with operational thresholds, ensuring that filters are both effective and practical for use in various applications. Filters with higher efficiencies, such as 99% or 100%, may offer additional benefits but are not strictly necessary to meet minimum performance requirements for overspray filtration. Thus, a rating of 98% is sufficient to demonstrate compliance with the performance criteria needed in many professional settings.