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General Ventilation Rates Table

Heat Transfer Design and Engineering
Industrial Electric Motors

General Ventilation Rates Table

Listed below are general ventilation rates for some common applications. Where more than one method is shown use the method that results in the higher airflow rate.

Application
Area
Method
Air
Change
Method
Occupancy Method
Other
cfm / person
sq ft/ person
General Ventilation
1 cfm
-
-
-
-
Attic Ventilation
.7 cfm
10
-
-
-
Auditoriums
4 to 15
-
-
-
Banks
4 to 10
20
50 to 150
-
Battery Charge Room
1.5 cfm
4
-
-
-
Boiler Room
15 to 30
-
-
-
Chemical Storgage Area
1.5 cfm
-
-
-
-
Class Room
-
-
15
0.05
-
Com puter Room
-
15 to 20
20
80 to 150
-
Conference Room
-
-
20
0.05
-
Corridors
.05 cfm
-
-
-
-
Churches
-
-
20
5 to 20
-
Elevators
1 cfm
-
-
-
-
Electrical Room
2 cfm
10
-
-
5 cfm / KVA
of transf.
Fire Station
4 to 10
20
100 to 500
-
Garage (Parking)
1.5 cfm
5 to 15
-
-
-
Garage (Repair)
-
6 to 30
-
-
5000 cfm / car
Gym nasium
-
6 to 30
-
-
-
Hospital (Patient Room s)
-
-
25
0.01
-
Kitchen Hood (Charbroiler)
-
-
-
-
300 cfm x linear. ft. .
Kitchen Hood (Island Type)
-
-
-
-
150 cfm / sq. ft.
Kitchen Hood (W all Mounted)
-
-
-
-
100 cfm / sq. ft.
Kitchen (General Ventilation)
1.5
12 to 15
15
50 to 150
-
Libraries / Museum s
-
-
20
30 to 100
-
Locker Room
-
12 to 30
-
-
-
Manufacturing (Light)
-
5 to 10
-
-
-
Manufacturing (Heavy)
-
10 to 20
-
-
-
Mechanical Room
2 cfm
-
-
-
-
Mech. Room (Com bustion Air)
-
-
-
-
8 cfm / BHP
Mech. Room (Com b. Exhaust)
-
-
-
-
2 cfm / BHP
Medical / Dental Office
-
8 to 12
20
50 to 150
-
Municipal Buildings
-
4 to 10
20
50 to 150
-
Police Station
-
4 to 10
20
100 to 500
-
Retail Store
.3 cfm
-
15
15 to 75
-
Superm arket
-
-
15
50 to 100
-
Toilet Room (Public)
-
-
-
-
75 cfm p/ W C & urinal
Toilet Room (Residential)
1 cfm
8
-
-
-
Warehouse Ventilation
1 cfm
6 to 15
-
-
-
Welding Operation
-
-
-
-
2500 cfm p/ welder
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