SIST EN ISO 16890-3:2024 PDF

Overview

EN ISO 16890-3:2024 - "Air filters for general ventilation - Part 3: Determination of the gravimetric efficiency and the air flow resistance versus the mass of test dust captured" - specifies the test equipment and procedures for measuring how much dust a general-ventilation air filter captures (gravimetric efficiency) and how its air-flow resistance changes as dust accumulates. The standard is part of the ISO 16890 series and is intended to be used in conjunction with ISO 16890-1, ISO 16890-2 and ISO 16890-4. It applies to tests on a nominal 610 mm × 610 mm (24 in × 24 in) face area with air flow rates between 0.25 m3/s and 1.5 m3/s and covers filter elements with ePM1 ≤ 99% and ePM10 > 20%. It does not apply to portable room-air cleaners.

Key Topics

• Test rig and equipment requirements: specification for a nominal test face area, upstream mixing, dust feeder, liquid-aerosol devices and final filter set-up.
• Air flow range: test applicability from 0.25 m3/s to 1.5 m3/s on the defined rig.
• Gravimetric efficiency measurement: procedures for loading test dust, measuring captured mass and calculating gravimetric efficiency versus captured dust mass.
• Resistance to air flow: methods to measure how pressure drop across the filter increases with dust loading; includes calculation annexes.
• Qualification and calibration: requirements for qualifying the test rig, dust feeder flow rates and final filter efficiency before formal testing.
• Dust-loading sequence and reporting: initial preparation, an updated initial loading step (revised to 60 g in the 2024 edition), dust loading procedure, arrestance, test dust capacity and required reporting elements (summary and detailed results).
• Scope limits: lower limit set because filters with ePM10