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What is EN 149:2013+A1:2009


EN 149 is a European standard that sets the requirements for respiratory protective devices, specifically filtering facepiece respirators. The standard was first introduced in 2001 and has undergone revisions since then. The latest version, EN 149:2013+A1:2009, provides guidelines for the performance and testing of these respirators. This article aims to explain the key aspects of the standard in a simple and understandable manner.

Main Requirements of EN 149:2013+A1:2009

The main objective of EN 149:2013+A1:2009 is to ensure that the filtering facepiece respirators provide effective protection against harmful substances in the air. The standard specifies various requirements that must be met by these respirators in order to be compliant. These requirements include filtration efficiency, breathing resistance, and compatibility with other personal protective equipment.

Filtration Efficiency

One of the crucial aspects of EN 149:2013+A1:2009 is the filtration efficiency of the respirators. According to the standard, the respirators must be capable of filtering a certain percentage of particles of different sizes. For example, they should have a minimum filtration efficiency of 80% against particles measuring 0.3 micrometers in diameter. The respirators are also required to provide sufficient protection against solid and liquid aerosols.

Breathing Resistance and Fit

In addition to filtration efficiency, EN 149:2013+A1:2009 also addresses the breathing resistance of the respirators. It sets limits on the maximum inhalation and exhalation resistance, ensuring that the users can breathe comfortably while wearing them. The standard also emphasizes the importance of a proper fit for effective protection. Respirators need to be designed and manufactured in a way that ensures good sealing to the face, minimizing inward leakage.


EN 149:2013+A1:2009 plays a critical role in ensuring the quality and performance of filtering facepiece respirators. It sets guidelines for key aspects such as filtration efficiency, breathing resistance, and fit. Compliance with this standard is important to safeguard the health and safety of workers exposed to hazardous substances. Understanding the requirements of EN 149:2013+A1:2009 helps users make informed decisions when choosing respiratory protective devices.


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