| Building / Room | Air Change Rates – n – (1/hr) |
| All Spaces in general | min 4 |
| Attic spaces for cooling | 12 – 15 |
| Auditoriums | 8 – 15 |
| Bakery | 20 – 60 |
| Banks | 4 – 10 |
| Barber Shops | 6 ? 10 |
| Bars | 20 – 30 |
| Beauty Shops | 6 ? 10 |
| Boiler rooms | 20 ? 60 |
| Bowling Alleys | 10 ? 15 |
| Cafeterias | 12 ? 20 |
| Churches | 15 ? 30 |
| 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 hotels | 5 |
| Dormitories | 7 ? 12 |
| Dress Shops | 6 – 10 |
| Drug Shops | 6 – 10 |
| Engine rooms | 12 ? 30 |
| Factory buildings, ordinary | 6 ? 15 |
| Factory buildings, fumes and moisture | 10 ? 15 |
| Fire Stations | 4 – 10 |
| Foundries | 15 – 30 |
| 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 | 20 – 60 |
| Libraries, public | 15 – 30 |
| Locker Rooms | 4 ? 15 |
| 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 | 7 ? 12 |
| Mills, textile dyehouses | 15 – 20 |
| Municipal Buildings | 4 ? 10 |
| Museums | 12 ?15 |
| Offices, public | 5 ? 12 |
| Offices, private | 5 ? 12 |
| Packing Houses | 12 ? 20 |
| Plating Rooms | 12 – 60 |
| Police Stations | 4 ? 10 |
| Post Offices | 4 ? 10 |
| Precision Manufacturing | 15 – 50 |
| Printing Shops | 6- 12 |
| Pump rooms | 5 |
| Restaurants | 8 – 20 |
| Rest Rooms | 6 ? 12 |
| Retail | 6 ? 10 |
| School Classrooms | 6 ? 12 |
| Shoe Shops | 6 ? 10 |
| Shopping Centers | 6 ? 10 |
| Shops, machine | 6 ? 12 |
| Shops, paint | 15 – 20 |
| Shops, woodworking | 5 |
| Substation, electric | 5 ? 10 |
| Supermarkets | 4 ? 10 |
| Town Halls | 4 ? 10 |
| Taverns | 20 – 30 |
| Theaters | 8 ? 20 |
| Transformer Rooms | 12 ? 60 |
| Turbine rooms, electric | 5 ? 10 |
| Warehouses | 6 ? 12 |
| Waiting rooms, public | 4 |
| Welding Shop | 12 – 60 |
Note that in many cases local regulations and codes will govern the ventilation requirements.
The fresh air supply to a room can be calculated as:
Q = n V (1)
where
Q = fresh air supply (ft3/h, m3/h)
n = air change rate (1/n)
V = volume of room (ft3, m3)
Example – Fresh Air Supply to Woodworking Shop
The fresh air supply to a wood working shop with volume 1000 m3 can be calculated as
Q = 5 (1/h) 1000 (m3)
= 5000 m3/h
