ASHRAE+62.1-2022+(1) - Page 051

Extracted Content

Table F-1 Required Zone Outdoor Airflow or Space Breathing Zone Contaminant Concentration with  Recirculation and Filtration for Single-Zone Systems (Continued)

Symbol or Subscript Definition

A, B filter location

V volumetric flow

C contaminant concentration

Ez zone air distribution effectiveness

Ef filter efficiency

Fr design flow reduction fraction factor

N contaminant generation rate

R recirculation flow factor

Subscript: o outdoor

Subscript: r return

Subscript: b breathing

Subscript: z zone

Figure F-1 Ventilation system schematic—constant-volume system with no infiltration/exfiltration. (* Vot = Voz for single- zone systems.)

Figure F-2 Ventilation system schematic—variable-air-volume system with no infiltration/exfiltration. (* Vot = Voz for single- zone systems).

ANSI/ASHRAE Standard 62.1-2022 49