T/CRAAS 439.1-2022 General Ventilation Filter - Part 1: Technical Requirements for Particulate Matter (ePM) Filter Efficiency

Scope

Main technical content: This part of the T/CRAAS 439 series standard specifies a general ventilation filter efficiency grading system for particulate matter (PM). The standard stipulates general requirements for test procedures, filter evaluation, labeling, and test result recording. This standard should be used in conjunction with T/CRAAS 439.2, T/CRAAS 439.3, and T/CRAAS 439.4. The test methods specified in this standard are applicable to airflow rates of 0.25 m3/s to 1.5 m3/s (900 m3/h to 5400 m3/h), with a nominal cross-section of the test bench being 610 mm × 610 mm. The T/CRAAS 439 standard (all parts) applies to general ventilation filters that have measured ePM1 efficiencies not exceeding 99% according to the test procedures specified in this series of standards. Air filters with higher initial efficiencies should be tested using other applicable methods (such as T/CRAA 431, Parts 1–5). This standard is not applicable to filters used in portable indoor air purifiers. The filter performance test results obtained according to this series of standards cannot be used to quantitatively predict the filtering efficiency and service life of the tested filters under actual operating conditions. Appendix A (informative appendix) provides other factors to be considered when evaluating the actual performance of filters in practical use.

Development Information

Same series standard

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