| Building / Room |
Air Changes per Hour |
| All spaces in general |
min 4 |
| Attic spaces for cooling |
12 - 15 |
| Auditoriums |
8 – 15 |
| Assembly Halls |
6 – 10 |
| Bakeries |
20 |
| Banks |
4 - 10 |
| Barber Shops |
6 - 10 |
| Bars |
20 - 30 |
| Beauty Shops |
6 - 10 |
| Boiler rooms |
15 - 20 |
| Bowling Alleys |
10 - 15 |
| Cafeterias |
12 - 15 |
| Churches |
8 - 15 |
| Club rooms |
12 |
| Clubhouses |
20 - 30 |
| Cocktail Lounges |
20 - 30 |
| Computer Rooms |
15 - 20 |
| Court Houses |
4 - 10 |
| Dental Centers |
8 - 12 |
| Department Stores |
6 - 10 |
| Dining Halls |
12 -15 |
| Dining rooms (restaurants) |
12 |
| Dress Shops |
6 - 10 |
| Drug Shops |
6 - 10 |
| Engine rooms |
4 - 6 |
| Factory buildings, ordinary |
2 - 4 |
| Factory buildings, fumes and moisture |
10 - 15 |
| Fire Stations |
4 - 10 |
| Foundries |
15 - 20 |
| Galvanizing plants |
20 - 30 |
| Garages repair |
20 - 30 |
| Garages storage |
4 - 6 |
| Homes, night cooling |
10 - 18 |
| Jewelry shops |
6 - 10 |
| Kitchens |
15 - 60 |
| Laundries |
10 - 15 |
| Libraries, public |
4 |
| Lunch Rooms |
12 -15 |
| Luncheonettes |
12 -15 |
| Nightclubs |
20 - 30 |
| Malls |
6 - 10 |
| Medical Centers |
8 - 12 |
| Medical Clinics |
8 - 12 |
| Medical Offices |
8 - 12 |
| Mills, paper |
15 - 20 |
| Mills, textile general buildings |
4 |
| Mills, textile dye houses |
15 - 20 |
| Municipal Buildings |
4 - 10 |
| Museums |
12 -15 |
| Offices, public |
3 |
| Offices, private |
4 |
| Police Stations |
4 - 10 |
| Post Offices |
4 - 10 |
| Precision Manufacturing |
10 - 50 |
| Pump rooms |
5 |
| Restaurants |
8 - 12 |
| Retail |
6 - 10 |
| School Classrooms |
4 - 12 |
| Shoe Shops |
6 - 10 |
| Shopping Centers |
6 - 10 |
| Shops, machine |
5 |
| Shops, paint |
15 - 20 |
| Shops, woodworking |
5 |
| Substation, electric |
5 - 10 |
| Supermarkets |
4 - 10 |
| Town Halls |
4 - 10 |
| Taverns |
20 - 30 |
| Theaters |
8 - 15 |
| Turbine rooms, electric |
5 - 10 |
| Warehouses |
2 |
| Waiting rooms, public |
4 |
