Gas-Phase Chemistry

Air Device Emissions Safety Testing

Evaluate ozone, NOx, formaldehyde, and VOCs in an integrated chamber study designed to support air-device safety decisions.

Under controlled RH and temperature, we measure TVOC, carbonyls, and ozone and provide pass/fail screening, full datasets, decay curves, and compliance-context summaries under ISO 17025.

ISO 17025UL 867CARB AB-2276EPA TO-15Reviewed 2026-05-15
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Purpose & when to use

The Air Device Emissions Safety Panel uses a structured chamber study to characterize ozone, NOx, formaldehyde (HCHO), total VOC (TVOC), and other unintended by-products generated while an air-cleaning device operates. Methods align with UL 867 and UL 2998 ozone standards, CARB AB-2276 California emission limits, EPA TO-15 VOC measurement, and ISO 17025 laboratory quality requirements. Use this service when:

  1. Screening portable air purifiers or whole-room air cleaners for ozone generation against UL 867 / UL 2998 limits — CARB AB-2276 compliance context added for California market submissions.
  2. Characterizing formaldehyde, carbonyls, and TVOC by-products from plasma, PCO, or photocatalytic air-cleaning units — ISO 17025 chamber controls document each device mode and operating condition.
  3. Generating safety substantiation for ionizer or UV / UVGI devices under FDA 21 CFR 801.415 ozone-emitting device limits — panel delivers a compliance-context summary alongside raw datasets.
  4. Comparing emission profiles across design revisions — mode-to-mode ozone and TVOC comparisons under EPA TO-15 framing document catalyst or media changes before retail or certification release.
  5. Pairing emissions safety data with [CADR or filtration efficiency studies](/testing-services/particle-aerosol-measurement/filtration-efficiency/) in a bundled ISO 17025 program — single coordinated run covers performance and safety requirements together.

Use the Air Device Emissions Safety Panel when a manufacturer, certification body, or retailer program needs documented evidence that an air-cleaning device does not introduce ozone or toxic by-products at unsafe levels. Results are supported by ISO 17025 quality-system controls and presented within the relevant compliance context.

Air-treatment device families served by this safety panel

The emissions safety panel applies to air-cleaning devices that generate ozone, NOx, formaldehyde, or TVOC as part of their cleaning mechanism or as an unintended by-product — from portable air purifiers to commercial in-duct systems under CARB AB-2276 and UL 867 scope.

  • Air purifierPortable and whole-room air cleaners
  • UVGI unitUltraviolet germicidal irradiation air cleaners
  • IonizerPlasma and ion-emitting air cleaners
  • In-duct air cleanerDucted HVAC gas-phase treatment modules
  • Photocatalytic unitPCO and TiO₂-based air cleaners

Instrumentation & measurement ranges

Platform selection follows the by-product species priority, chamber volume, and whether transient peaks or steady-state concentrations are the study focus — each combination is scoped at study planning and documented in the report.

1 – 2000 ppbelectrochemical

Ozone analyzer (UV photometric)

Continuous real-time ozone monitoring — captures start-up peaks, steady-state levels, and decay profiles aligned to UL 867 and CARB AB-2276 concentration limits with time-stamped logs.

0.5 – 5000 ppbchemiluminescent

NOx analyzer (chemiluminescent)

Nitric oxide and nitrogen dioxide real-time profiling — documents NOx generation from plasma and ionizer devices across operating modes for safety and indoor air quality context.

1 – 5000 µg/m³carbonyl-mass

Aldehyde / DNPH cartridge and HPLC

Formaldehyde and carbonyl quantitation — DNPH-derivatized cartridge sampling with HPLC-UV analysis targets HCHO, acetaldehyde, and higher carbonyls for each device mode and condition.

1 – 10000 µg/m³speciated-mass

TD-GC/MS and FTIR (TVOC and speciated VOC)

TVOC and speciated VOC measurement via thermal desorption GC/MS and real-time FTIR — EPA TO-15 and ISO 16000 aligned compound identification and TVOC profiling across device operating cycles.

Test method options

MethodStrengthsTradeoffAligned with
Safety screening panel (ozone analyzer + DNPH/HPLC — UL 867 aligned)
  • Ozone, formaldehyde, and TVOC in one chamber run — UL 867 and CARB AB-2276 pass/fail screen delivered alongside datasets for engineering review.
  • Go/no-go result aligned to regulatory limits — ISO 17025 controls support internal risk reviews and certification planning.
Elevated ozone or carbonyls may require follow-on root-cause work — mode mapping or targeted investigation adds time and sampling.
UL 867CARB AB-2276ISO 17025
Mode and duty-cycle mapping (multi-analyzer — EPA TO-15 aligned)
  • Worst-case settings identified — ozone and TVOC time series per fan speed, UV state, or plasma level under EPA TO-15 framing.
  • Mode-resolved datasets document which configuration drives peak by-product concentrations — supports design decisions and retailer program substantiation.
More conditions increase test time and sampling media — scope and replicate plan must be defined at project kick-off to control costs.
EPA TO-15ISO 17025
Targeted by-product investigation (TD-GC/MS / FTIR — fit for purpose)
  • TD-GC/MS speciation identifies specific compounds and formation drivers — deep-dive into carbonyls, VOCs, or oxidant-driven species for safety narratives.
  • FTIR real-time profiling captures transient spikes during mode changes — paired with discrete GC/MS tubes for temporal and compound-level resolution.
Compound-specific method extension requires added sorbent tubes, DNPH cartridges, and planning — scope must be defined before chamber runs begin.—
Integrated safety and performance bundle (multi-instrument — ISO 17025)
  • Ozone, TVOC, and formaldehyde results linked to CADR or filtration in one program — single report covers safety and performance.
  • Coordinated scheduling reduces overall study time versus separate programs — shared chamber setup, single device run.
Combined program requires aligned scheduling and a joint analysis plan — scope changes in the performance component delay the combined deliverable.
ISO 17025

Setup configurations

Each safety panel is configured around the device size, technology type, operating modes, and compliance context the data must support. The study setup balances chamber volume, which affects dilution, equilibration time, and analytical sensitivity, with environmental control and realistic device placement geometry. The following dimensions are defined during study planning and locked into the protocol before chamber testing begins:

Device interfaces

Chamber volume selected to match device size and mode — device placement, inlet orientation, and mixing fan configuration held constant across conditions to ensure repeatable dilution and sampling geometry.

Flow & actuation profiles

Stabilization period, run duration, sampling cadence, and device mode sequence defined in the protocol — replicate runs across key modes document repeatability and mode-to-mode by-product variability.

Environmental controls

RH and temperature setpoints logged throughout each run — conditioning reduces chamber background variability and improves ozone and carbonyl reproducibility, especially for humidity-sensitive oxidant reactions.

Sample numbers

Replicate runs per mode plus background runs (device off) and chamber blanks as controls — replicate plan sized to expected variability from chamber background, device cycle-to-cycle stability, and analytical noise.

Media & handling

Ozone denuders, DNPH cartridges, and TD sorbent tubes selected per target species — chain of custody, storage temperature, and blank accompaniment documented from field collection through final analysis.

Compliance frame anchored to the standards that matter

Each Air Device Emissions Safety Panel operates within a documented quality system grounded in the ozone safety, VOC measurement, and laboratory competence standards used for air-cleaning device emissions characterization. The four anchors below establish the compliance framework and data requirements carried through to the final deliverables.

  • ISO 17025AccreditedTesting-laboratory competence — documented methods, calibration traceability, and uncertainty contributors.
  • UL 867AlignedOzone emission limits for electrostatic air cleaners — indoor ozone concentration thresholds during device operation.
  • CARB AB-2276AlignedCalifornia ozone-emission limits for air cleaners — applies to products sold or distributed in California.
  • EPA TO-15AlignedVOC determination in ambient air — canister sampling and GC/MS analytical framing for speciated VOC reports.

Key data outputs & reporting

Each Air Device Emissions Safety Panel provides time-series data for ozone, NOx, formaldehyde, and TVOC, along with compliance-context pass/fail screening, QA / QC controls, and identified uncertainty contributors. Deliverables are formatted to support internal risk reviews, certification planning, and product documentation. Extended studies that compare operating modes, design revisions, or multi-unit batches also include mode-comparison and trend materials for engineering or regulatory follow-up.

Primary outputs

  • Ozone concentration versus time — peak, steady-state, and decay profile per device mode with CARB AB-2276 and UL 867 limit reference lines where applicable.
  • Formaldehyde and carbonyl concentrations per mode — per-cartridge blank-corrected HPLC-UV results with detection limit documentation.
  • TVOC and speciated VOC results where included — time-series TVOC and compound-level identification via FTIR or TD-GC/MS per operating condition.
  • Compliance-context pass/fail summary — mode-level and study-level screening outcome with the regulatory limit frame applied.

Deliverables

#FormatContents
01PDF reportExecutive summary, method appendix, time-series figures, and compliance-context pass/fail summary.
02CSV / XLSX datasetsTime-series ozone, NOx, carbonyl, TVOC, and speciated VOC data per mode and replicate.
03FiguresTime-series overlays, mode comparisons, decay curves, and summary panels for technical documentation.
Extended deliverables · multi-arm comparability · stability · predicate studies
  • Multi-mode comparison pack — Side-by-side ozone, TVOC, and carbonyl overlays across device modes, fan speeds, or operating states.
  • Design-change safety delta — Before-and-after emission profiles with statistical framing for catalyst, media, UV source, or plasma changes.

QA / QC & data integrity

Each Air Device Emissions Safety Panel includes a documented QA / QC framework matched to the instrument suite, chamber volume, and target by-product list. Under our ISO 17025 quality system, verifications are completed before and after each test set, with calibration records traceable from ozone analyzer zero/span checks through the final reported concentrations. Every test campaign also includes chamber background and blank runs.

Background runs (device off) and chamber blanks — establishes pre-test ozone and VOC baseline and documents background-subtraction approach applied to device-on results.

Field blanks and method blanks for DNPH cartridges and TD sorbent tubes — accompanies each sampling set to confirm blank-free media and derivatization integrity before analysis.

Ozone analyzer zero/span verification and multi-point calibration before each chamber run — confirms instrument sensitivity and linearity at the study concentration range.

NOx analyzer zero/span and calibration gas verification — nitric oxide and NO₂ response confirmed before and after each run session with acceptance criteria documented in the calibration log.

Time-synchronization checks across multi-instrument datasets — ozone, NOx, FTIR, and RH/temperature logging time-stamped to a common reference for accurate mode-to-mode comparison.

Chain of custody for sampling media, analyzer calibration records, and device configuration — DNPH cartridge lot numbers, sorbent tube IDs, device serial number, and mode sequence logged per campaign.

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 (25 yrs - cascade & inhalation methods) - Weston Schaper (7 yrs - real-time sizing & nanoparticle work)
17025Accredited testing
900+Studies Performed
17+Years in operation
300+Clients supported

Common questions

Quick answers to the questions portable air purifier developers, ionizer and plasma device teams, UVGI manufacturers, and in-duct engineers ask most often when scoping an Air Device Emissions Safety Panel — ozone versus VOC scope, which standards apply, how modes are handled, and what deliverables look like. These are starting points; reach out if your device technology, target species, or compliance frame doesn't match — most panels need at least one configuration choice customized to the specific by-product concern.

Q.What is the difference between this panel and a general VOC emissions study?
A.The safety panel provides compliance-context pass/fail screening against ozone limits in UL 867, CARB AB-2276, and FDA 21 CFR 801.415. It also evaluates safety-relevant by-products, including formaldehyde, NOx, and TVOC, and includes a compliance summary with the datasets. A general VOC study provides broader characterization without framing the results against safety limits.
Q.Which ozone standards does this panel address?
A.Depending on the device type and target market, we align testing with UL 867 for electrostatic air cleaners, UL 2998 for zero-ozone validation, CARB AB-2276 for California limits, and FDA 21 CFR 801.415 for ozone-emitting medical devices. The applicable compliance context is defined during study planning.
Q.Can you test multiple operating modes in a single study?
A.Yes. Mode mapping is a standard part of the panel. We characterize ozone, formaldehyde, and TVOC at each fan speed, UV state, or plasma power level to identify worst-case settings before certification or retail submission.
Q.Do you measure ozone and formaldehyde in the same chamber run?
A.Yes. Measuring ozone and formaldehyde during the same chamber run is standard practice and helps determine whether oxidant-driven carbonyl formation may be occurring. All instruments are time-synchronized throughout the run.
Q.How do you establish what a background ozone level is before the device runs?
A.Background runs are completed with the device off after the chamber reaches equilibrium to establish pre-test ozone and VOC baselines. These levels are documented and used to correct or bound the device-on results. Chamber blanks confirm that background concentrations meet acceptance criteria before device-on sampling begins.
Q.What do I receive at the end of a safety panel study?
A.Deliverables include a PDF report with an executive summary and method appendix, raw CSV / XLSX time-series datasets, and figures showing ozone, formaldehyde, and TVOC over time. The figures also include compliance-limit reference lines and comparisons across operating modes.

Standards & guidance

ARE Labs runs Air Device Emissions Safety Panel studies in alignment with the ozone safety, VOC measurement, carbonyl quantitation, and laboratory competence standards used for air-cleaning device emissions characterization. Methods covered by third-party accreditation are identified as accredited under ISO 17025. When a standard is followed but the method is not formally accredited, it is described as aligned or conformant where applicable. The cards below identify the standards most relevant to air-device safety panel programs.

QA & Regulatory - Accredited

ISO 17025

Testing and calibration laboratory competence — documented methods, uncertainty, and traceabilityView standard ->Gas & VOC Analysis - Aligned

UL 867

Ozone emission limits for electrostatic air cleaners — indoor concentration thresholds during operationView standard ->Gas & VOC Analysis - Aligned

CARB AB-2276

California ozone-emission limits for air cleaners sold or distributed in CaliforniaView standard ->Gas & VOC Analysis - Aligned

EPA TO-15

VOC determination in ambient air — canister sampling and GC/MS analytical methodView standard ->Gas & VOC Analysis - Aligned

ASHRAE 62.1

Indoor air quality ventilation standard — reference frame for ozone and VOC concentration limits in occupied spacesView standard ->

Related services & devices

Service

VOC and By-Product Emissions Testing

Deeper speciated VOC and carbonyl profiling for device or material characterization — feeds emission factors into safety panel compliance narratives.Read more ->Devices

Portable Room Air Purifiers

Portable UV, plasma, and PCO air cleaners are the primary safety-panel candidates — ozone and by-product characterization across all device modes.Read more ->Service

Gas and VOC Destruction

Destruction-efficiency studies use the safety panel's by-product characterization as the challenge inlet profile — inlet and treated-air concentrations compared.Read more ->Devices

In-Duct Commercial Air Cleaners

Ducted HVAC gas-phase and UV modules need safety-panel ozone and carbonyl characterization before occupied-space deployment under ASHRAE 62.1 indoor air quality context.Read more ->