| Air renewal in occupied premises |
Renew/time N |
| Cathedrals |
0 |
| Modern church (low ceilings) |
1 - 2 |
| Schools, classrooms |
2 - 3 |
| Bank branch |
3 - 4 |
| Canteens (factories or military) |
4 - 6 |
| Hospitals |
5 - 6 |
| General offices |
5 - 6 |
| Hotel bar |
5 - 8 |
| Fine restaurants |
5 - 6 |
| Laboratories (with localised hoods) |
6 - 8 |
| Mechanisation workshops |
5 - 10 |
| Pubs (with tanks) |
10 - 12 |
| General factories |
5 - 10 |
| Meeting rooms |
5 - 8 |
| Car parks |
6 - 8 |
| Dance halls |
6 - 8 |
| Discotheques |
10 - 12 |
| Average restaurant (third full of smokers) |
8 - 10 |
| Upper balconies |
6 - 10 |
| Private members clubs (with smokers) |
8 - 10 |
| Cafés |
10 - 12 |
| Domestic kitchens (hood installation recommended) |
10 - 15 |
| Theatres |
10 - 12 |
| Washrooms |
13 - 15 |
| Games room (with smokers) |
15 - 18 |
| Cinemas |
15 - 18 |
| Cafeterias and fast-food |
15 - 18 |
| Industrial kitchens (hood must be used) |
15 - 20 |
| Launderettes |
20 - 30 |
| Foundries (without localised extraction) |
20 - 30 |
| Dry cleaners |
20 - 30 |
| Bakeries |
25 - 35 |
| Industrial units with ovens and baths (without hoods) |
30 - 60 |
| Painting workshops (hood installation recommended) |
40 - 60 |
