ASTM E2720
ASTM E2720-16, withdrawn in 2023, is retained for legacy air-permeable-material protocol review.
AlignedStandards
Bioaerosol ChallengeASTM E2720ASHRAE 241ISO 16000
Standards-aligned challenge methods for air cleaners, detectors, materials, and microbial efficacy programs.
Use these references to tie the bioaerosol apparatus, challenge aerosol, sampling, recovery, and clean-air context to a reviewable protocol.
Standard roster
Individual standards in this cluster
ASTM E2720, ASHRAE 241, ISO 16000 Part 36, and ISO 16000 Part 37 form the citation set; ARE Labs maps them to challenge apparatus, run controls, viable recovery, and report evidence.
ASHRAE 241
ASHRAE 241 frames infectious aerosol risk reduction, equivalent clean airflow, air-cleaning technology use, and planning context.
AlignedISO 16000 Part 36
ISO 16000 Part 36 applies to chamber evaluation of air purifiers against culturable airborne bacteria.
AlignedISO 16000 Part 37
The official ISO 16000 Part 37 page covers PM2.5 mass concentration and states that bioaerosol determination is outside scope.
AlignedPurpose & when to use
Selecting a bioaerosol challenge method starts with the product and study question. ASTM E2720 provides legacy context for biological aerosol challenge of air-permeable materials. ASHRAE 241 provides infectious aerosol and equivalent clean airflow context, while ISO 16000 Part 36 supports chamber reduction-rate studies for culturable airborne bacteria. The applicable references help teams choose the apparatus, organism or surrogate, sampling plan, and reporting approach:
- Air-cleaner teams use ASHRAE 241 and ISO 16000 Part 36 context when clean-air claims need chamber or duct challenge evidence.
- Legacy material programs may reference ASTM E2720 (2016 edition, withdrawn 2023) when air-permeable textiles or media need virus-containing droplet nuclei challenge and recovery planning.
- Bioaerosol detector studies use ASTM, ASHRAE, or ISO anchors to define generator output, sampling position, and concentration-time records.
- Claims-support programs use ASHRAE 241 language to separate clean airflow equivalence, viable reduction, and device operating limitations.
A reduction result alone does not show how the challenge was controlled. Use this cluster to plan how challenge generation, recovery, environmental controls, deviations, and reporting will be documented for reviewer assessment.
Applicable to
Built around bioaerosol challenge decisions
The cluster applies when device performance or material efficacy depends on controlled biological aerosol generation, exposure geometry, viable sampling, recovery checks, and documented operating conditions.
Standards in this group
What each citation controls
This page is a cluster, not a claim that every citation governs every study. ASTM, ASHRAE, and ISO references control different parts of the apparatus, exposure, clean-air, and documentation question. ARE Labs uses the official publisher scope first, then records any fit-for-purpose departures in the protocol and final report.
ASTM
AlignedASTM E2720
Standard Practice for Evaluation of Effectiveness of Decontamination Procedures for Air-Permeable Materials when Challenged with Biological Aerosols Containing Human Pathogenic Viruses
ASTM E2720-16, withdrawn in 2023, is retained for legacy air-permeable-material protocol review. Any selected generation, exposure, handling, or recovery provisions are identified with adaptations and limits; this is not a current general bioaerosol method.
ASTM official catalogue verified 2026-10-20: E2720-16 was withdrawn in 2023. Retained for legacy protocol review; any selected provisions or adaptations are identified explicitly.
ASHRAE
AlignedASHRAE 241
Standard 241, Control of Infectious Aerosols
ASHRAE 241 frames infectious aerosol risk reduction, equivalent clean airflow, air-cleaning technology use, and planning context. ARE Labs uses it as a clean-air and challenge-design reference, not as a product certification claim.
ASHRAE official Standard 241 page and publication notice verified 2026-05-17.
ISO
AlignedISO 16000 Part 36
Indoor air - Part 36: Standard method for assessing the reduction rate of culturable airborne bacteria by air purifiers using a test chamber
ISO 16000 Part 36 applies to chamber evaluation of air purifiers against culturable airborne bacteria. ARE Labs uses it to frame chamber setup, operating conditions, viable sampling, recovery checks, reduction calculations, and reporting boundaries.
ISO official standard page verified 2026-05-17; public page provides month-level publication data only.
ISO
AlignedISO 16000 Part 37
Indoor air - Part 37: Measurement of PM2,5 mass concentration
The official ISO 16000 Part 37 page covers PM2.5 mass concentration and states that bioaerosol determination is outside scope. It can inform separately scoped indoor-particle monitoring, but it is not a biological challenge or viable-recovery method.
ISO official Part 37 page verified 2026-05-17; its scope covers PM2.5 mass concentration and excludes bioaerosol determination.
Laboratory accreditation and method alignment
ARE Labs is ISO/IEC 17025-accredited for its current testing scope. ASTM E2720, ASHRAE 241, and ISO 16000 references are aligned by protocol where applicable, not additional accredited scopes. Reports distinguish accredited results, non-accredited results, method adaptations, and the limits of each challenge and recovery endpoint.
- ASTM E2720AlignedMaterial challenge frame followed where study design fits.
- ASHRAE 241AlignedClean-air context translated into apparatus and report language.
- ISO 16000 Part 36AlignedAir-purifier bacteria chamber frame followed by protocol.
- ISO 16000 Part 37AlignedParticle-measurement reference retained with scope caveat.
Operational chain
How ARE Labs turns the standards into a study
Bioaerosol standards define reference boundaries, but the final method must match the organism, generator, chamber or duct geometry, device operation, recovery method, and decision point. ARE Labs translates the citation set into executable controls and reportable outputs.
01
Configuration
Map the challenge apparatus
We map ASTM E2720, ASHRAE 241, or ISO 16000-36 context to generator type, chamber or duct geometry, mixing, sampler position, and device operating mode.
Protocol setup02
Challenge
Control aerosol generation
ASTM E2720 and ISO 16000 references guide challenge concentration targets, background checks, environmental conditions, exposure duration, and run acceptance criteria for the selected organism or surrogate.
Run control log03
Recovery
Verify sampling and assay fit
Viable samplers, impingers, cyclones, or collection media are checked against ASTM E2720 or ISO 16000 study needs before reduction or recovery data are interpreted.
Recovery record04
Adaptation
Document fit-for-purpose choices
When ASHRAE 241 clean-air context or ISO chamber language does not govern the exact product, ARE Labs records the rationale, limits, and deviations.
Rationale log05
Reporting
Connect data to the citation frame
Reports connect concentration-time data, viable recovery, reduction calculations, operating conditions, and ISO 16000 Part 37 caveats back to the selected standards.
Review-ready reportData quality, QA/QC & documentation
Reviewers need records of the bioaerosol challenge apparatus and recovery methods. Within the selected ASTM, ASHRAE, and ISO study framework, ARE Labs documents background checks, flow and environmental conditions, sampler suitability, assay outputs, raw data retention, deviations, and QA review.
Connect apparatus to citation
ASTM E2720 and ISO 16000-36 runs link generator setup, chamber or duct configuration, sampler placement, and exposure timing to the selected frame.
Preserve run conditions
ASHRAE 241 context makes airflow, device mode, mixing, background aerosol, temperature, and humidity part of the review trail.
Check collection and assay fit
ASTM E2720 or ISO 16000 study records identify viable sampler checks, recovery suitability, organism or surrogate handling, and assay acceptance limits.
Retain raw and reduced data
ISO 16000 Part 36 reports connect concentration-time data, viable counts, reduction calculations, environmental records, and calibration references.
Separate scope from alignment
ISO 17025 review language and ISO 16000 Part 37 caveats prevent aligned references from reading like formal accreditation or bioaerosol certification.
Why ARE Labs
ARE Labs connects technical topics to practical study design, method selection, controlled aerosol work, and reportable evidence without turning technical pages into sales pages.
Reviewed byJamie Balarashti - Weston Schaper
QualityDocumented study records
900+Studies Performed
17+Years in operation
300+Clients supported
Common questions
These questions help air-cleaner, detector, material, and microbial efficacy teams scope bioaerosol challenge work with ARE Labs before testing begins. They cover the roles of ASTM E2720, ASHRAE 241, and ISO 16000 Part 36, the particle-monitoring limits of ISO 16000 Part 37, and when a fit-for-purpose protocol is needed.
Q. Which standard applies?
A. It depends on the product, organism or surrogate, exposure geometry, and claim. Withdrawn ASTM E2720-16 provides legacy context for air-permeable materials. ISO 16000 Part 36 covers air-purifier chamber studies using culturable airborne bacteria, while ASHRAE 241 provides context for infectious aerosol control.
Q. Is ISO 16000 Part 37 bioaerosol?
A. ISO 16000 Part 37 measures PM2.5 mass concentration and excludes bioaerosol determination. It can inform separate particle monitoring, but it is not the biological challenge or viable-recovery method.
Q. Does ARE Labs certify products?
A. No. ARE Labs performs testing aligned with the selected standard where applicable. Certification, listing, or regulatory approval may require review by a separate authority or certification body.
Q. What if my setup differs?
A. ARE Labs can write a fit-for-purpose protocol that defines the apparatus, generator, organism or surrogate, device operation, sampling plan, controls, recovery checks, deviations, and report outputs.
Q. What data do clients receive?
A. Typical outputs include challenge concentration, recovery data, reduction calculations, environmental records, device conditions, sample records, QA/QC findings, deviations, and a final report.
Related services & devices
Related services & devices
Service
Device Challenge Aerosol
Primary service route for biological and particle challenge apparatus, generation, sampling, and reporting.Read more ->ServiceBioaerosol Efficacy Testing (Room)
Chamber challenge route for room-scale air-cleaner or UVGI efficacy studies.Read more ->ServiceInline Bioaerosol Reduction
Duct and single-pass route for inline air-treatment systems and reduction evidence.Read more ->ServiceBioaerosol Risk Assessment
Emission and exposure route for products that may create unintended biological aerosol risk.Read more ->ServiceParticle Size Distribution Testing
Pairs particle sizing and concentration evidence with biological challenge generation.Read more ->DevicesRoom Air Purifiers
Portable air cleaners evaluated with chamber challenge, viable recovery, and clean-air context.Read more ->DevicesWhole-Room Air Cleaners
Large air-cleaning systems scoped around room performance and challenge distribution.Read more ->DevicesUVGI Devices
UV and UVGI systems where exposure geometry, airflow, and microbial recovery matter.Read more ->DevicesInline Duct Air Treatment
Duct-mounted systems needing single-pass challenge, flow control, and sampler placement.Read more ->DevicesBioaerosol Detectors
Sensors and monitors challenged against generated aerosol and sampling references.Read more ->Related clusters
Related standards clusters
Bioaerosol challenge work often sits beside filtration, deposition, and air-cleaner performance questions. These clusters help teams move from biological challenge design into neighboring particle or filter evidence without losing the standards context.
Standards