Occupiable spaces listed in Table 402.1 shall be
designed to have ventilation (outdoor) air for occupants in
accordance with this chapter. Ventilation air supply requirements
for occupancies regulated by the California Energy
Commission are found in the California Energy Code.
TABLE 402.1
MINIMUM VENTILATION RATES IN BREATHING ZONE1, 2, 4
[ASHRAE 62.1: TABLE 6.2.2.1]Note: Ventilation air supply requirements for occupancies regulated by the California Energy Commission are found in the California Energy Code.
OCCUPANCY CATEGORY4
PEOPLE OUTDOOR Air Rate RP(cfm/person)
AREA OUTDOOR Air Rate RA(cfm/ft2)
DEFAULT OCCUPANT Density3 (people/1000 ft3)
AIR CLASS
CORRECTIONAL FACILITIES
Booking/waiting
7.5
0.06
50
2
Cell
5
0.12
25
2
Day room
5
0.06
30
1
Guard stations
5
0.06
15
1
EDUCATIONAL FACILITIES
Art classroom
10
0.18
20
2
Classrooms (ages 5-8)
10
0.12
25
1
Classrooms (age 9 plus)
10
0.12
35
1
Computer lab
10
0.12
25
1
Daycare (through age 4)
10
0.18
25
2
Daycare sickroom
10
0.18
25
3
Lecture classroom
7.5
0.06
65
1
Lecture hall (fixed seats)
7.5
0.06
150
1
Media centera
10
0.12
25
1
Multi-use assembly
7.5
0.06
100
1
Music/theater/dance
10
0.06
35
1
Science laboratories
10
0.18
25
2
University/college laboratories
10
0.18
25
2
Wood/metal shop
10
0.18
20
2
FOOD AND BEVERAGE SERVICE
Bars, cocktail lounges
7.5
0.18
100
2
Cafeteria/fast food dining
7.5
0.18
100
2
Kitchen (cooking)
7.5
0.12
20
2
Restaurant dining rooms
7.5
0.18
70
2
GENERAL
Break rooms
5
0.06
25
1
Coffee stations
5
0.06
20
1
Conference/meeting
5
0.06
50
1
Corridors
–
0.06
–
1
Occupiable storage rooms for liquids or gels b
5
0.12
2
2
HOTELS, MOTELS, RESORTS, DORMITORIES
Barracks sleeping areas
5
0.06
20
1
Bedroom/living room
5
0.06
10
1
Laundry rooms, central
5
0.12
10
2
Laundry rooms within dwelling units
5
0.12
10
1
Lobbies/pre-function
7.5
0.06
30
1
Multipurpose assembly
5
0.06
120
1
OFFICE BUILDINGS
Breakrooms
5
0.12
50
1
Main entry lobbies
5
0.06
10
1
Occupiable storage rooms for dry materials
5
0.06
2
1
Office space
5
0.06
5
1
Reception areas
5
0.06
30
1
Telephone/data entry
5
0.06
60
1
MISCELLANEOUS SPACES
Bank or bank lobbies
7.5
0.06
15
1
Bank vaults/safe deposit
5
0.06
5
2
Computer (not printing)
5
0.06
4
1
Freezer and refrigerated spaces (<50°F) e
10
–
–
2
General manufacturing (excludes heavy industrial and processes using chemicals)
For SI units: 1 cubic foot per minute = 0.0283 m3/min, 1 square foot = 0.0929 m2
Notes:
1 This table applies to no-smoking areas. Rates for smoking-permitted spaces shall be determined using other methods.
2 Volumetric airflow rates are based on an air density of 0.075 pounds of dry air per cubic foot (lbda/ft3) (1.201 kgda/m3), which corresponds to dry air at a
barometric pressure of 1 atm (101 kPa) and an air temperature of 70°F (21°C). Rates shall be permitted to be adjusted for actual density but such adjustment
is not required for compliance with this chapter.
3 The default occupant density shall be used where actual occupant density is not known.
4 Where 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.
a For high school and college libraries, use values shown for Public Assembly Spaces - Libraries.
b Rate is capable of not being sufficient where stored materials include those having potentially harmful emissions.
c Rate does not allow for humidity control. Additional ventilation or dehumidification shall be permitted to remove moisture. "Deck area" refers to the area surrounding the pool that would be expected to be wetted during normal pool use, i.e., where the pool is occupied. Deck area that is not expected to be wetted
shall be designated as a space type (for example, "spectator area").
d Rate does not include special exhaust for stage effects, e.g., dry ice vapors, smoke.
e Where combustion equipment is intended to be used on the playing surface or in the space, additional dilution ventilation, source control, or both shall be
provided.
f Default occupancy for dwelling units shall be two persons for studio and one-bedroom units, with one additional person for each additional bedroom.
g Air from one residential dwelling shall not be recirculated or transferred to other spaces outside of that dwelling.
The outdoor air
ventilation rate and air distribution assumptions made in
the design of the ventilation system shall be clearly identified
on the construction documents.
Mechanical
ventilation for health care facilities shall be designed
and installed in accordance with this code and ASHRAE
170-2013, through Addendum ae, as published with
“Guidelines for Design and Construction of Hospitals and
Outpatient Facilities,” 2014 edition (published by The
Facility Guidelines Institute). All supply-air, return air,
and exhaust-air systems shall comply with ASHRAE 170.
The text of ASHRAE 170 shall be modified as follows:
ASHRAE 170. Section 6.1.2.1 -- Not adopted.
ASHRAE 170. Section 6.3.2 -- Not adopted.
ASHRAE 170. Table 6.4 - Not adopted.
ASHRAE 170. Section 6.4-6.4.4 -- Not adopted.
ASHRAE 170. Section 6.9 -- Not adopted.
ASHRAE 170. Section 7.1a -- Modify as follows:
Replace reference to Table 7.1 with reference to
Table 4-A.
ASHRAE 170. Section 7.2.1a through e -- Not
adopted.
ASHRAE 170. Section 7.2.2 a through c, and e --
Not adopted
ASHRAE 170. Section 7.2.3 -- Not adopted.
ASHRAE 170. Section 7.3.1 -- Modify as follows:
Replace reference to Table 7.1 with reference to
Table 4-A.
ASHRAE 170. Section 7.4.1 -- Modify as follows:
Delete the Exception that allows for high return
grilles.
Share URL
Copy and paste the link below into emails, chats or browsers.