ISO 10121-2:2013

Overview

ISO 10121-2:2013 - Test methods for assessing the performance of gas‑phase air cleaning devices (GPACD) - defines objective laboratory methods to estimate the performance of full‑size gas‑phase air cleaning devices used in general ventilation (residential and non‑residential). The standard evaluates whole devices regardless of internal media or technology (adsorbents, scrubbers, absorbers, packed columns or non‑sorptive devices) so that suppliers need not disclose proprietary design details.

Key technical topics and requirements

• Device scope and exclusions: Applies to GPACDs that fit typical box sizes (~300 × 300 × 300 mm up to ~610 × 610 × 610 mm). Nuclear and military applications are excluded.
• Objective whole‑device testing: Test results are deliberately not linked to internal parameters - focus is on price/performance and comparable, normative data.
• Test parameters and sequences:
  • Conditioning and pressure‑drop determination
  • Initial removal efficiency (steady reading as soon as possible)
  • Capacity determination (integrated amount of sorbate removed to a specified end point)
  • Retentivity and breakthrough vs. time curves
• Key test concepts and definitions: face velocity, challenge concentration/compound, bypass, channeling, adsorption/absorption/desorption, decay time and rise time.
• Apparatus requirements and validation: The standard does not mandate a specific test‑stand design but prescribes properties, validation tests (rise/decay time), sampling accuracy and normative generation parameters. Annex A gives detailed validation procedures; Annex B lists challenge gases and analysis techniques; Annex C discusses example test‑stand designs.
• Reporting: Specifies raw data handling, evaluation, and standardized test report content to support objective comparison.

Practical applications - who uses ISO 10121-2

• GPACD manufacturers seeking objective performance claims without revealing proprietary construction.
• Media suppliers and system integrators comparing device‑level performance in real ventilation conditions.
• Independent test laboratories performing validated, repeatable GPACD evaluations.
• HVAC engineers, facility managers and procurement teams selecting gas‑phase filtration based on comparable metrics (efficiency, capacity, pressure drop).
• Regulators and standards committees needing a normative test interface for general ventilation applications.

Related standards

• ISO 10121‑1 (media tests) - complements Part 2 by focusing on gas‑phase air cleaning media.
• ISO 29464 (terminology) and EN 15805 (dimensions) are normatively referenced by ISO 10121‑2.
• Other sector standards (ASHRAE, ASTM, JIS) exist for specific applications (automotive, in‑duct, adsorptive media).

ISO 10121‑2 is useful when you need a transparent, comparable, and vendor‑neutral method to assess whole‑device gas‑phase filtration performance for general ventilation.