ASHRAE - 52.2 ADD C
Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size
| Organization: | ASHRAE |
| Publication Date: | 21 January 2022 |
| Status: | active |
| Page Count: | 8 |
scope:
PURPOSE AND SCOPE OF OPTIONAL TEST
This appendix addresses the need, highlighted by the COVID19 pandemic, for efficiency data for air cleaners used to remove or inactivate airborne viruses and bacteria. ASHRAE Standard 185.1L-1 only allows testing of ultraviolet (UV) devices. This appendix uses similar procedures, also based on using a Standard 52.2-type duct and including much of the same equipment and quality assurance (QA) as Standard 52.2, to allow testing of other air-cleaning devices. The main changes to Standard 52.2 are the use of bioaerosols as the challenge instead of nonbiological particles and the use of bioaerosol samplers and subsequent counting to determine the upstream and downstream concentrations. The calculations are changed from those of Standard 52.2 to those of Standard 185.1, which are a simplified version of those used in Standard 52.2, to be applicable to bioaerosol data.
This appendix presents a method that allows users to employ the basic Standard 52.2 test rig and QA along with procedures based on Standard 185.1 to determine the efficiency of an HVAC-mounted filter or air cleaner for removal/inactivation
This test may be used in place of the efficiency portion of Standard 52.2 with or without the dust loads of Standard 52.2.
This test is intended for use with most air cleaners. However, for devices using UV-C, only those with the UV light completely contained within the device shall be tested. Uncontained UV devices shall be tested with Standard 185.1.
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