UL - 2823 BULLETIN
UL Standard for Safety Measuring and Evaluating Chemical and Particle Emissions From Electronic Equipment Using Dynamic Environmental Chambers
|Publication Date:||7 November 2014|
UL Environment certifies indoor products for low chemical emissions using testing procedures described herein to cover a breadth of product types and building applications. The science of measuring product emissions developed from research conducted by the Environmental Protection Agency, Department of Energy, the Department of Housing and Urban Development, the Consumer Product Safety Commissions, California Department of Health Services, the state of Washington Department of General Administration, and additional national and international researchers. UL Environment offers product testing and consulting services to manufacturers of products and end users. UL Environment brings together performance based, field validated standards to define low emitting products and materials for the indoor environment; 2) provide a third party, non-industry and publicly available certification process for manufactured products; and 3) establish a public directory of certified products for architects, designers, specifiers, purchasers, and consumers.
The following Method incorporates the best-learned practices for testing and evaluating electronic equipment for GREENGUARD Certification, including computers, video monitors, televisions, DVD players, cable boxes, scanners, receivers, CD players, and speakers. Elements of the Method include sample handling and shipment, sample preparation, product loadings and descriptions, environmental chamber exposure, analytical measurements, exposure modeling and allowable levels for the GREENGUARD Certification Program. Analytes include total volatile organic compounds (TVOC), individual VOCs, formaldehyde and other aldehydes,ozone, and fine particulate matter 2.5 micrometers and smaller (PM2.5). All individual VOCs emitting from products are measured as allowed by UL 2823, GREENGUARD Environmental Labeling Program Method for Measuring and Evaluating Chemical and Particle Emissions From Electronic Equipment Using Dynamic Environmental Chambers, and each measured VOC is required to meet defined allowable levels. UL 2823 incorporates additional criteria to provide a higher margin of safety for young children. This method reduces allowable chemical levels. It also requires that emissions meet the 1/2 CREL criteria of certain target chemicals as listed in State of CA DHS's "Standard Practice for the Testing Of Volatile Organic Emissions Sources Using Small Scale Environmental Chambers" (CA/DHS/EHLB/R-174) and adopted by the California High Performance School (CHPS) Program. UL 2823 requires a review of measured chemical emissions across a broader range of risk based exposure levels established by the US Environmental Protection Agency (EPA), the Agency for Toxic Substances and Disease Registry (ATSDR) of the Center for Disease Control (CDC), and the State of California Office of Environmental Health Hazard Assessment (OEHHA), This further strengthens the criteria by requiring product emissions be less than defined risk-based air concentration levels for both acute (short-term) and chronic (long-term) exposures.
This document will be updated as new test protocols and standards become available.
Electronic equipment may emit a variety of volatile chemicals into the indoor air space of a building. The following methodology measures total volatile organic compounds (TVOC), individual volatile organic compounds (IVOCs), formaldehyde and other aldehydes, ozone and respirable particle emission levels from electronic equipment using test conditions defined to simulate product use in realistic commercial office, educational, healthcare and/or residential settings. The levels of emissions are determined by observing the TVOC, IVOC, aldehyde,ozone, and respirable particle (PM2.5) concentrations in a dynamic environmental chamber under specified test conditions. The observed chamber concentration is then converted by a mathematical calculation to an emission rate, a product specific variable, and then modeled to obtain room concentration estimates.
The quantity of VOCs in the environmental chamber air is determined by gas chromatography/mass spectrometry (GC/MS). The methodology is generally applicable to volatile organic compounds with boiling points from 60°C to 290°C emitting from individual products. Emissions of selected aldehydes are measured using reverse-phase high-performance liquid chromatography (HPLC) with UV detection. Ozone is measured using a UV-absorbance based ozone analyzer. Respirable particles (PM2.5) are monitored using a 90° light scattering measurement to continuously determine airborne particle concentrations over time. Specialized analysis of chamber air samples may be conducted for other specific target chemicals as specified for a specific product/project requirement.