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ISO/IEC 28360-1: Information Technology — Office Equipment — Electronic Device Chemical Emission Rates
Standardized test methods for measuring volatile organic compound and particulate emissions from office electronic devices
ISO/IEC 28360-1 establishes standardized methodologies for determining chemical emission rates from electronic office equipment, including printers, copiers, computers, and displays. As modern office environments become increasingly dense with electronic devices, understanding and controlling chemical emissions has become critical for indoor air quality management and occupational health. This standard provides manufacturers, testing laboratories, and facility managers with a consistent framework for measuring and comparing emission profiles across different equipment types and brands.
ISO/IEC 28360-1 is essential reading for facility managers and occupational health professionals. The standard’s emission testing protocols form the basis for many green building certification programs including LEED and WELL, which require low-emitting office equipment for credit compliance.
Environmental Chamber Specifications and Test Conditions
The standard specifies the use of environmental test chambers with strict controls on temperature, humidity, air exchange rate, and background contamination levels. Test chambers must be constructed from inert materials such as electro-polished stainless steel or glass to minimize adsorption and desorption of chemical compounds. The chamber volume must accommodate the equipment under test while maintaining the prescribed loading factor, typically expressed as the ratio of equipment surface area to chamber volume.
Temperature is maintained at 23 +/- 2 degrees Celsius and relative humidity at 50 +/- 5 percent, reflecting typical office environmental conditions. The air exchange rate is set to 0.5 air changes per hour to simulate average office ventilation. Background concentrations of target compounds must be below specific thresholds before testing begins, ensuring that measured emissions are attributable solely to the equipment under test.
| Parameter | Specification | Tolerance |
|---|---|---|
| Chamber temperature | 23 degrees Celsius | +/- 2 degrees Celsius |
| Relative humidity | 50% | +/- 5% |
| Air exchange rate | 0.5 air changes per hour | +/- 0.05 ACH |
| Chamber material | Electro-polished stainless steel or glass | Inert, low-adsorption surface |
| Background TVOC | Below 20 micrograms per cubic meter | Maximum allowable |
| Background single VOC | Below 2 micrograms per cubic meter | Maximum allowable |
| Chamber loading factor | 0.5 to 2.0 square meters per cubic meter | Equipment-dependent |
Background contamination is the most common source of error in emission testing. Even trace levels of cleaning solvents, outgassing from chamber seals, or compounds introduced by operators can skew results. Always run a full background characterization before each test sequence and purge chambers with purified air between tests.
Emission Testing Protocols and Analytical Methods
ISO/IEC 28360-1 defines a multi-phase testing protocol that captures emissions during standby operation, active operation, and power-down transitions. For printing and imaging equipment, the active phase includes a standardized print job with defined coverage, resolution, and page count to ensure reproducible emission profiles. Air samples are collected on adsorbent tubes containing Tenax TA or similar media for volatile organic compound analysis, while aldehydes are captured on dinitrophenylhydrazine (DNPH) coated cartridges.
Analysis is performed using gas chromatography-mass spectrometry (GC-MS) for VOC identification and quantification, and high-performance liquid chromatography (HPLC) for aldehyde analysis. The standard specifies detection limits, calibration procedures, and quality control requirements including replicate sampling, blank corrections, and surrogate recovery verification.
The standard’s rigorous analytical protocols ensure inter-laboratory reproducibility within 30% for most target compounds — a significant achievement given the complexity of trace-level organic analysis. This reliability enables manufacturers to confidently declare emission rates and certifying bodies to verify compliance with indoor air quality programs.
Emission Rate Calculations and Health-Based Reporting
Emission rates are calculated using steady-state concentration measurements in the chamber combined with the air exchange rate and chamber volume. The specific emission rate (SER) is expressed in micrograms per hour, while area-specific emission rates normalize the results to equipment surface area. The standard provides detailed calculation formulas and uncertainty analysis methods.
A health-based reporting framework categorizes compounds by their toxicological significance, with particular emphasis on carcinogenic compounds, respiratory irritants, and reproductive toxicants. Recommended exposure limits (RELs) from public health authorities provide context for interpreting emission rates, enabling buyers to compare equipment based on both performance and health impact.
| Compound Category | Examples | Health Concern | Typical Sources in Office Equipment |
|---|---|---|---|
| Aromatic hydrocarbons | Toluene, xylene, ethylbenzene | Respiratory irritation, neurological effects | Adhesives, coatings, plastic casings |
| Aldehydes | Formaldehyde, acetaldehyde | Carcinogenic, respiratory sensitizer | Thermal paper, toner degradation, adhesives |
| Aliphatic hydrocarbons | Decane, undecane, dodecane | Low acute toxicity, irritant at high levels | Printing inks, lubricants |
| Halogenated compounds | Dichlorobenzene, trichloroethylene | Potential carcinogen, liver toxicity | Cleaning agents, flame retardants |
| Particulate matter | Ultrafine particles (< 100 nm) | Respiratory and cardiovascular effects | Printer toner, laser printing processes |
Formaldehyde and other aldehydes are among the most concerning emissions from office equipment due to their carcinogenic classification. The International Agency for Research on Cancer (IARC) classifies formaldehyde as a Group 1 carcinogen. When selecting office equipment for occupied spaces, prioritize models with documented low formaldehyde emission rates and ensure adequate ventilation in equipment-dense areas.
When comparing emission test reports from different manufacturers, verify that testing was performed in accordance with ISO/IEC 28360-1 under equivalent operating conditions. Differences in print job intensity, chamber conditions, or sample collection timing can produce significantly different results. Request full test reports including operating conditions, analytical methods, and uncertainty estimates for meaningful comparisons.
Frequently Asked Questions
Q: How long does a typical ISO/IEC 28360-1 emission test take?
A: A complete test cycle including chamber conditioning, background measurement, equipment warm-up, active operation sampling, and post-operation monitoring typically requires 24 to 48 hours per equipment sample. The standard specifies sampling at multiple time points including immediately after power-on, during steady-state operation, and after power-down to capture the full emission profile.
Q: What is the difference between TVOC and individual VOC measurements?
A: TVOC (Total Volatile Organic Compounds) represents the sum of all detected VOCs eluting between n-hexane and n-hexadecane on a non-polar GC column, quantified as toluene equivalents. Individual VOC measurements identify and quantify specific compounds using authentic standards. ISO/IEC 28360-1 requires both approaches: TVOC for a quick screening indicator and individual VOC analysis for health risk assessment of specific compounds of concern.
Q: Are chemical emission rates from office equipment regulated by law?
A: While ISO/IEC 28360-1 itself is a voluntary standard, its test methods are referenced by several regulatory and certification programs. Germany’s Blue Angel ecolabel, the EU Ecolabel, and US EPA’s SNAP program all reference this standard for office equipment certification. Some jurisdictions require low-emission equipment for government procurement, making compliance with this standard a de facto market requirement.
Q: Can emission rates change over the lifetime of office equipment?
A: Yes, emission rates typically decrease over time as residual solvents and manufacturing process chemicals outgas. The highest emission rates are generally observed when equipment is new. ISO/IEC 28360-1 testing is typically conducted on new equipment, but the standard acknowledges that aging effects may be significant. For health exposure assessments, consider that real-world emissions in occupied offices may differ from laboratory measurements due to dilution, ventilation, and equipment age factors.
