T/CRAAS 439.3-2022 General Ventilation Filter - Part 3: Determination of weight-based efficiency, resistance, and relationship between trapped volume and resistance, and determination of trapping capacity test method

Scope

Main technical content: This part of the T/CRAAS 439 series standard specifies the test equipment and test methods for the weight efficiency and resistance of general ventilation filters. This standard needs to be used in conjunction with T/CRAAS 439.1, T/CRAAS 439.2, 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 610 mm × 610 mm on the test bench. The T/CRAAS 439 standard (all parts) applies to general ventilation filters that have measured ePM1 efficiencies not exceeding 99% and ePM10 efficiencies not less than 20% according to the test procedures specified in this series of standards. The T/CRAAS 439 standard (all parts) applies to general ventilation filters that have measured ePM1 efficiencies not exceeding 99% and ePM10 efficiencies not less than 20% according to the test procedures specified in this series of standards. For filter efficiency measurements in other particle size ranges, other test methods such as T/CRAA 431 Parts 1–5 should be used. 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 filter efficiency and service life of the tested filters under actual operating conditions.

Development Information

Same series standard

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