HVAC Air Change Out Frequency (minutes)

HVAC Systems & Components

The following are general recommendations for total volume of air change out for selected type indoor air spaces.

HVAC Space Definition
Air Change Out Frequency (minutes)
Assembly Halls
3-10
Auditoriums
4-15
Bakeries
1-3
Boiler Rooms
2-4
Bowling Alleys
2-8
Dry Cleaners
1-5
Engine Rooms
1-1.5
Factories (General)
1-5
Forges
1-2
Foundries
1-4
Garages
2-10
Generating Rooms
2-5
Glass Plants
1-2
Gymnasiums
2-10
Heat Treat Rooms
0.5-1
Kitchens
1-3
Laundries
2-5
Locker Rooms
2-5
Machine Shops
3-5
Mills (Paper)
2-3
Mills (Textile)
5-15
Packing Houses
2-15
Recreation Rooms
2-8
Residences
2-5
Restaurants
5-10
Retail Stores
3-10
Shops (General)
3-10
Theaters
3-8
Toilets
2-5
Transformer Rooms
1-5
Turbine Rooms
2-6
Warehouses
2-10