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ASHRAE Standard Standard 185.3-2024 -- Method of Testing Commercial and Industrial In-Room Air-Cleaning Devices and Systems for Microorganism Bioaerosol Removal or Inactivation in a Test Chamber (ANSI Approved), 2024
- ASHRAE Online Bookstore
- Addenda
- Errata
- ANSI/ASHRAE Standard 185.3-2024 [Go to Page]
- Contents
- Foreword
- 1. Purpose
- 2. Scope [Go to Page]
- 2.1 This standard specifies selected indicator microorganisms in the test chamber and defines procedures for generating the bioaerosols required for the method of test.
- 2.2 This standard provides a method for counting the number of viable microorganisms in the chamber to calculate the elimination efficiency for each microorganism.
- 2.3 This standard establishes minimum performance specifications for the equipment required to conduct the tests, defines methods of calculating and reporting results obtained from the test data, and establishes a reporting system to be applied to in...
- 2.4 This standard does not address the health and safety effects of operating devices and systems in an occupied room.
- 2.5 This standard applies to commercial and industrial in-room air-cleaning devices and systems. This standard is not intended to conflict with or replace ANSI/AHAM Standard AC-5 1 for testing portable residential air cleaners.
- 3. Definitions and Acronyms [Go to Page]
- 3.1 Definitions
- 3.2 Acronyms, Abbreviations, and Initialisms
- 4. Test Apparatus and Materials [Go to Page]
- 4.1 Test Chamber
- 4.2 In-Room Air Cleaners
- 4.3 Nebulizers
- 4.4 Bioaerosol Samplers
- 4.5 Material, Chemical, and Physical Testing
- 4.6 Noise Dosimeter
- 4.7 Cleanup/Flushing System
- 4.8 Materials
- 5. Procedures [Go to Page]
- 5.1 Before Testing—Setup
- 5.2 Background and Baseline Sample Collection. This section is a required part of each natural decay and IRAC test.
- 5.3 Natural Decay or IRAC Test
- 6. Calculations and Graphing Requirements [Go to Page]
- 6.1 Variables
- 6.2 For bioaerosol samples, there are several metrics to calculate.
- 6.3 For other analytes, calculate the concentrations at the time intervals of each microbiological sample. It is acceptable to calculate all concentrations, if desired. Subtract the background concentration of the same analyte. Tabulate the results.
- 6.4 Average noise results either mathematically or Lave from the direct-read instrument. See Informative Appendix D for additional information.
- 7. Reporting Results [Go to Page]
- 7.1 Minimum Required Information
- 8. Normative References
- Normative Appendix A: Test Organisms (Select One from Each Organism Type)
- Normative Appendix B: Quality Assurance/Quality Control
- Normative Appendix C: Mounting and Installation of IRAC
- Informative Appendix D: IRAC Safety and Health Considerations [Go to Page]
- D1. Occupied Versus Nonoccupied Spaces
- D2. All Hazards Exposure Risk Assessment (Ozone, UV, Etc.)
- D3. Potential Hazardous Analytes
- D4. Noise Exposure
- Informative Appendix E: Informative References and Bibliography [Go to Page]
