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BS EN ISO 29462:2022 – TC 2024

BS EN ISO 29462:2022 – TC 2024

$258.95

Tracked Changes. Field testing of general ventilation filtration devices and systems for in situ removal efficiency by particle size and resistance to airflow

Published By Publication Date Number of Pages
BSI 2024 139
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This document describes a procedure for measuring the performance of general ventilation air cleaning devices in their end use installed configuration. The performance measurements include removal efficiency by particle size and the resistance to airflow. The test procedures include the definition and reporting of the system airflow. The procedure describes a method of counting ambient air particles of 0,3 ?m to 5,0 ?m upstream and downstream of the in-place air cleaner(s) in a functioning air handling system. The procedure describes the reduction of particle counter data to calculate removal efficiency by particle size. Since filter installations vary dramatically in design and shape, a protocol for evaluating the suitability of a site for filter evaluation and for system evaluation is included. When the evaluated site conditions meet the minimum criteria established for system evaluation, the performance evaluation of the system can also be performed according to this procedure. This document also describes performance specifications for the testing equipment and defines procedures for calculating and reporting the results. This document is not intended for measuring performance of portable or movable room air cleaners or for evaluation of filter installations with an expected filtration efficiency at or above 99 % or at or below 30 % when measured at 0,4 ?m.

PDF Catalog

PDF Pages PDF Title
1 30461953
88 A-30404140
89 National foreword
91 European foreword
94 Foreword
95 Introduction
96 1 Scope
2 Normative references
3 Terms, definitions, and abbreviated terms
3.1 Terms and definitions
98 3.2 Abbreviated terms
99 4 Test equipment and setup
4.1 Particle counter
4.2 Diluter
4.3 Pump
4.4 Sampling system
4.4.1 General
100 4.4.2 Sampling probes
4.4.3 Sampling lines
4.4.4 Sampling locations
101 4.4.5 Valve (manual or automatic)
4.4.6 Isoaxial sampling nozzle
102 4.4.7 Flow meter
4.5 Air velocity measurement instrument
4.6 Relative humidity (RH) measurement instrument
4.7 Temperature measurement instrument
4.8 Resistance to airflow measurement instrument
4.9 Test equipment maintenance and calibration
103 5 Site evaluation
5.1 General
5.2 Filter installation pre-testing inspection
5.3 Approval for testing
6 Test procedure
6.1 Air velocity
104 6.2 Relative humidity (RH)
6.3 Temperature
6.4 Resistance to airflow
105 6.5 Removal efficiency
6.5.1 Removal efficiency tests
6.5.2 Sampling method
109 6.6 Sampling probes
6.6.1 Location of sampling probes
6.6.2 Location of upstream sampling probes
6.6.3 Location of downstream sampling probes — Filter efficiency test
6.6.4 Location of downstream sampling probes — System efficiency test
7 Expression of results
7.1 General information
111 7.2 Data collection
112 8 Errors and data analyses
8.1 General
8.2 Relative humidity (RH)
8.3 Air temperature
8.4 Aerosol composition
8.5 Uniformity of aerosol concentration
113 8.6 Coincidence errors — Particle counter
8.7 Particle losses
9 Calculation of results
9.1 Calculation of removal efficiency
9.1.1 General
9.1.2 Dataset sample average
114 9.1.3 Minimum upstream concentration
9.1.4 Particle size range efficiency
115 9.1.5 Average efficiency by particle size
9.2 Calculation of uncertainty
9.2.1 General
9.2.2 95 % confidence limit
116 9.3 Coefficient of variation (Cv)
10 Optional enhanced test system
10.1 Application of enhanced test system
117 10.2 Principle of the enhanced test system
118 10.3 Determination of the corrected particle size
119 10.4 Presentation of results
120 Annex A (informative) Filter installation pre-testing inspection form
122 Annex B (informative) Approval for testing form
123 Annex C (informative) Example of how to complete testing
137 Bibliography

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BS EN ISO 29462:2022 - TC 2024
$258.95