Enviroment/Site | Air Changes Per Hour |
| Assembly Halls | 4-6 |
| Bakery | 20-30 |
| Boiler House | 20-30 |
| Canteens | 4-6 |
| Engine Rooms | 6-10 |
| Factories/Workshop | 6-10 |
| Foundry | 20-30 |
| Furnace Shop | 30-60 |
| Kitchen (Commercial) | 15-20 |
| Machine Shop | 06-10 |
| Paint Shop | 30-60 |
| Transformer Room | 12-30 |
| Warehouse | 5-10 |
