Minimum Ventilation Rates in Rooms

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Minimum Ventilation Rates in Rooms

Minimum Ventilation Rates in the Breathing Zone, Based on ANSI/ASHRAE Standard 62.1-2007

Occupancy	Human Outdoor Air Rate, R cfm/person	Area Outdoor Air Rate, Ra cfm/ft²	Occupant Density (see Note 4) #/1,000 ft²	Combined Outdoor Air Rate cfm/person	Air Class
Educational Facilities
Daycare (through age 4)	10	0.18	25	17	2
Classrooms (ages 5–8)	10	0.12	25	15	1
Classrooms (ages 9 plus)	10	0.12	35	13	1
Lecture classroom	7.5	0.06	65	8	1
Art classroom	10	0.18	20	19	2
Science laboratories	10	0.18	25	17	2
University/college laboratories	10	0.18	25	17	2
Wood/metal shop	10	0.18	20	19	2
Multi-use assembly	7.5	0.06	100	8	1
Office Buildings
Office space	5	0.06	5	17	1
Reception areas	5	0.06	30	7	1
Main entry lobbies	5	0.06	10	11	1
Miscellaneous Spaces
Electrical equipment rooms	––	0.06	––	––	1
Shipping/receiving	––	0.12	––	––	1
Warehouses	––	0.06	––	––	2
Public Assembly Spaces
Auditorium seating area	5	0.06	150	5	1
Libraries	5	0.12	10	17	1
Museums (children's)	7.5	0.12	40	11	1
Museums/galleries	7.5	0.06	40	9	1
Retail
Sales (except as listed below)	7.5	0.12	15	16	2
Mall common areas	7.5	0.06	40	9	1
Beauty and nail salons	20	0.12	25	25	2
Sports and Entertainment
Gym/stadium (play area)	––	0.3	30	––	2
Spectator areas	7.5	0.06	150	8	1
Health club/aerobics room	20	0.06	40	22	2
Gambling casinos	7.5	0.18	120	9	1

General Notes for Table:

1. Related requirements: The rates in this table are based on all other applicable requirements of ANSI/ASHRAE Standard 62.1-2007 being met.
2. Smoking: This table applies to no-smoking areas. Rates for smoking-permitted spaces must be determined using other methods.
3. Air density: Volumetric airflow rates are based on an air density of 0.075 lb_da/ft³, which corresponds to dry air at a barometric pressure of 1 atm and an air temperature of 70°F. Rates may be adjusted for actual density but such adjustment is not required for compliance with the standard.
4. Default occupant density: The default occupant density shall be used when the actual occupant density is not known.
5. Default combined outdoor air rate (per person): This rate is based on the default occupant density.
6. Unlisted occupancies: If the occupancy category for a proposed space or zone is not listed, the requirements for the listed occupancy category that is most similar in terms of occupant density, activities, and building construction shall be used.

References

ASHRAE Fundamentals Handbook, 2021