ASHRAE+62.1-2022+(1) - Page 059
Extracted Content
(This appendix is not part of this standard. It is merely informative and does not contain requirements necessary for conformance to the standard. It has not been processed according to the ANSI requirements for a standard and may contain material that has not been subject to public review or a consensus process. Unresolved objectors on informative material are not offered the right to appeal at ASHRAE or ANSI.)
INFORMATIVE APPENDIX J RATE RATIONALE
Table J-1 provides description and rationale for the Ventilation Rate Procedure (VRP) rates in Table 6-1, “Minimum Ventilation Rates in Breathing Zone.” This information may be helpful to designers and other practitioners.
Table J-1 Rate Rationale (see Table 6-1)
People Outdoor Air Rate, L/s/person
Area Outdoor Air Rate,
cfm/ft [2]
Area Outdoor Air Rate, Air
L/s·m [2] Class
Occupancy Category Description/Rationale
Correctional Facilities
Booking/waiting Occupant activity varies between sedentary and moderate walking. Occupants are generally more vocal. Occupants may not be as well-groomed as typical occupants. Occupant stress levels are generally high. All of which result in higher metabolic rates. There are no significant space-related contaminants.
Cell Occupant activity is primarily sedentary (seated or sleeping). There are typically higher levels of space-related contaminants due to presence of a water closet, sink, and stored clothing. The presence of a water closet is the primary reason why this space has an Air Class of 2.
Day room Occupant activity is primarily sedentary (seated, watching television). There are no significant space-related contaminants.
People Outdoor Air Rate, cfm/person
7.5 3.8 0.06 0.3 2
5 2.5 0.12 0.6 2
5 2.5 0.06 0.3 1
Guard stations Occupant activity is primarily sedentary (seated). There are no significant space-related contaminants. 5 2.5 0.06 0.3 1
Educational Facilities
Art classroom Occupant activity is moderate. There is considerable aerobic activity in addition to the occupants being very vocal. Also, the occupants are primarily children with higher metabolic rates. There are significant space-related contaminants, including open paints, glues, and cleaning agents. The presence of these open contaminants result in this space being classified as Air Class 2.
Classrooms (ages 5 through 8)
Classrooms (age 9 plus)
Occupant activity is primarily sedentary (seated or light walking). However, occupants are generally more vocal. Also, the occupants are primarily children with higher metabolic rates and often more bioeffluents. There are some significant space-related contaminants, typically stored arts-and-crafts supplies and cleaning agents.
Occupant activity is primarily sedentary (seated or light walking). However, occupants are generally more vocal. Also, the occupants are primarily children with higher metabolic rates and often more bioeffluents. There are some significant space-related contaminants, typically stored arts-and-crafts supplies and cleaning agents.
10 5 0.18 0.9 2
10 5 0.12 0.6 1
10 5 0.12 0.6 1
10 5 0.12 0.6 1
Computer lab Occupant activity is primarily sedentary (seated or light walking). However, occupants are generally more vocal. Also, the occupants can be children/young adults with higher metabolic rates. There are some significant spacerelated contaminants, typically toner cartridges and paper.