Portable air purifiers

Portable air purifiers can be an extremely cost-effective, energy-efficient way to improve indoor air quality, particularly for artists or organizations that use multiple venues or are unable to renovate their existing venue.^{Footnote 145} For best results, the number of devices and their clean air delivery rate (CADR) should match the size of the space or the number of people.^{Footnote 146}

Portable air purifiers can produce some noise. Depending on context, this may be addressed by:

• Choosing quieter air purifiers (the Clean Air Stars tool filters by noise level, or consider DIY versions with computer (PC) fans)^{Footnote 147}
• Using more air purifiers on a lower setting
• Using microphones to improve audibility
• Altering purifier placement (e.g., related to recording equipment)
• Using noise cancellation or hearing protection
• Switching air purifiers on intermittently (e.g., during recording session breaks)
• Combining with other clean air options (e.g., open windows, safely installed upper-room UV) and other layered protections

Note that air purifiers generally filter particles (e.g., dust, mould, pollen, bacteria, viruses). For gases or fumes, specialized filters or ventilation are needed.