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California Mechanical Code (Part 4, Title 24, California Code of Regulations) - page 3 / 49

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Table 4-4

2007 CALIFORNIA MECHANICAL CODE

TABLE 4-4 Minimum Exhaust Rates [ASHRAE 62.1:Table 6-4]

Occupancy Category

Exhaust Rate cfm/unit

Exhaust Rate cfm/ft 2

Exhaust Rate L/s-unit

Exhaust Rate L/s-m 2

Art classrooms

1 Auto repair rooms Barber shop Beauty and nail salons Cell with toilet Darkrooms

2 Arena Kitchen – commercial Kitchenettes Locker rooms Locker/dressing rooms

3 Parking garages Janitor, trash, recycle Pet shops (animal areas) Copy, printing rooms Science lab classrooms

4 5 Toilets – public Toilet – private Woodwork shop/classroom

- - - - - - - - - - - - - - - - 50/70 25/50 -

0.70

-

3.5

1.50

-

7.5

0.50

-

2.5

0.60

-

3.0

1.00

-

5.0

1.00

-

5.0

0.50

-

2.5

0.70

-

3.5

0.30

-

1.5

0.50

-

2.5

0.25

-

1.25

0.75

-

3.7

1.00

-

5.0

0.90

-

4.5

0.50

-

2.5

1.00

-

5.0

-

25/35

-

-

12.5/25

-

0.50

-

2.5

Notes For Table 4-4 1 Stands where engines are run shall have exhaust systems that directly connect to the engine exhaust and prevent escape

of fumes. 2 The rates do not include exhaust from vehicles or equipment with internal combustion engines. 3 Exhaust not required if two or more sides comprise walls that are at least 50% open to the outside. 4 Rate is per water closet or urinal. Provide the higher rate where periods of heavy use are expected to occur, e.g., toilets in

theatres, schools, and sports facilities. 5 Rate is for a toilet room intended to be occupied by one person at a time. For continuous system operation during normal

hours of use, the lower rate may be used. Otherwise use the higher rate.

58

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