What is EN ISO 779:2018?

EN ISO 779:2018 is an international standard that provides a method for determining the particle filtration efficiency of air filters in general ventilation systems. It specifies the procedure and the test equipment required to evaluate the performance of these filters.

Understanding the Purpose

The purpose of EN ISO 779:2018 is to ensure that the air filters used in general ventilation systems are effective in removing particulate matter from the air. This is important because airborne particles, such as dust, pollen, and bacteria, can have adverse effects on human health, especially for those with respiratory conditions or allergies. By setting standards for air filter performance, this standard helps to maintain indoor air quality and prevent the spread of harmful pollutants.

Testing Methodology

To determine the particle filtration efficiency of an air filter, EN ISO 779:2018 uses a testing apparatus that consists of a specified volume of synthetic dust particles suspended in a controlled airflow. The air is forced through the filter while the concentration of particles upstream and downstream of the filter is measured.

The test measures the percentage of particles removed by the filter. The higher the filtration efficiency, the more particles the filter can capture and prevent from entering the indoor environment.

Benefits and Considerations

Adhering to EN ISO 779:2018 benefits both manufacturers and users of air filters. Manufacturers can demonstrate the performance and quality of their products by obtaining certification according to this standard. Users, on the other hand, can rely on certified filters to provide cleaner and healthier indoor air.

It's important to note that EN ISO 779:2018 is specifically designed for general ventilation systems and may not be applicable to specialized filtration applications, such as cleanrooms or certain industrial processes. In such cases, other standards and testing methods specific to those applications should be considered.