What is ISO 5011 about?
ISO 5011 is an international standard on inlet air cleaning equipment that permits direct laboratory performance comparison of air cleaners.
ISO 5011 on Inlet air cleaning equipment establishes and specifies uniform test procedures, conditions, equipment and a performance report to permit the direct laboratory performance comparison of air cleaners.
The basic performance characteristics of greatest interest are airflow restriction or differential pressure, dust collection efficiency, dust capacity and oil carry-over on oil bath air cleaners. This test code therefore deals with the measurement of these parameters.
ISO 5011 is applicable to air cleaners used on internal combustion engines and compressors generally used in automotive and industrial applications.
Who is ISO 5011 for?
ISO 5011 on Inlet air cleaning equipment is relevant: 
- Automobile manufacturers
- Internal combustion engine manufacturers
Why should you use ISO 5011?
An air cleaner for an internal combustion engine includes a filter element and a housing having the filter element situated therein, with the housing having an outlet for allowing filtered air to flow to the engine and an inlet permitting entry of air into the housing.
It is important to prepare performance reports to permit the direct laboratory performance comparison of air cleaners, you can do that with the help of ISO 5011 which provides this performance report along with uniform test procedures, conditions and equipment needed. This can be very useful for the automobile industry to streamline the air cleaners process.
What’s changed since the last update?
BS ISO 5011:2020 supersedes BS ISO 5011:2014+A1:2018, which is withdrawn.
BS ISO 5011:2020 includes some technical changes with respect to BS ISO 5011:2014+A1:2018. These are:
- Added a validation procedure for verifying efficiency measurements
- Revised recommended ISO dust injector table
- Added formula for precleaner efficiency method
- Removed requirement for secondary element collapse test
- Added Annex H (Penetration sensitivity)
