ASHRAE Standard 185.1-2020
ASHRAE Standard 185.1-2020 Method of Testing UV-C Lights for Use in Air-Handling Units or Air Ducts to Inactivate Airborne Microorganisms Test standards form the foundation for air-cleaner selection in the ventilation industry. U.S. Environmental Protection Agency (USEPA) literature states that the most important need in the area of ultraviolet germicidal irradiation (UVGI) is industry standards to rate installed devices. Standards for testing and reporting on products under controlled conditions are essen-tial to users and specifiers so that they can compare products, predict levels of performance under specified operating conditions with reasonable certainty, and determine appropriate UVGI efficiencies for specific situations.
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ASHRAE Standard 185.1-2020 Content ![]()
- Foreword
- Purpose
- Scope
- Definitions
- Test Apparatus and Procedures
- Apparatus Qualification Testing
- Bioaerosol Testing
- Determination of Performance
- Reporting Results
- Normative References
Informative Appendix
- A: Test Organism
- B: Limitations
- C: Safety
- D: Environmental Considerations
- E: Microorganism Susceptibility to UV-C Irradiation
- F: Technical Issues Regarding Aerosol
- G: Dosage Calculation
- H: Informative References
- I: Addenda Description and Information
This is a test-method standard, and its results to be used to directly compare UVGI equipment on a standardized basis irrespective of their application. Results also used to give the design engineer an easy-to-use basis for specifying UV devices or estimating the rela-tive performance of UVGI for a given application. It is possible that an industry organization may use this test method as the basis for an application standard in which they might require testing at conditions different than those required here. This test specifies two organisms for testing but allows other organisms to be used as long as the test reports correctly labeled.
This test method may also be used to test air-cleaning devices that do not use ultraviolet technology, as long as the device being tested can be installed in the testing duct system described in this method.. Work is underway to develop a bioaerosol test method that will allow more comprehensive testing of additional air-cleaning devices.
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