The table provided below serves as a valuable resource, presenting meticulously curated reference values for air volume allocation, thoughtfully categorized by the specific usage of various rooms, all in accordance with the esteemed DIN 1946 part 2 guidelines. These standards, meticulously crafted by the prestigious German Institute for Standardization (Deutsches Institut für Normung, DIN), have garnered widespread recognition and acceptance on a global scale. Their comprehensive and meticulously researched nature ensures that these air volume values are applicable and relevant in diverse contexts worldwide, offering a reliable and internationally acknowledged foundation for ventilation planning and optimization
| Building / Room | Number of Air Changes per Hour |
|---|---|
| All spaces in general | 4 |
| Assembly Halls | 4-8 |
| Attic spaces for cooling | 12-15 |
| Auditoriums | 12-15 |
| Bakeries | 20-30 |
| Banks | 4-10 |
| Barber Shops | 6-10 |
| Bathrooms | 3-8 |
| Bars | 20-30 |
| Beauty Shops | 6-10 |
| Boiler Rooms | 15-30 |
| Bowling Alleys | 10-15 |
| Cafeterias | 12-15 |
| Chemical Stores | 5+ |
| Churches | 8-15 |
| Classrooms | 6-20 |
| Club Rooms | 12+ |
| Clubhouses | 20-30 |
| Cocktail Lounges | 20-30 |
| Computer Rooms | 15-20 |
| Court Houses | 4-10 |
| Cellars | 3-10 |
| Commercial Kitchens | 30+ |
| Compressor Rooms | 10-20 |
| Conference Rooms | 8-12 |
| Dairies | 8-12 |
| Dance Halls | 6-9 |
| Dental Centers | 8-12 |
| Pharmacies | 6-10 |
| Engine Rooms | 15-30 |
| Entrance Halls & Corridors | 3-5 |
| Factory Buildings | 2-4 |
| Factory Buildings with Fumes/Moisture | 10-15 |
| Fire Stations | 4-10 |
| Foundries | 15-20 |
| Fume Cupboards | 40-50 |
| Galvanizing Plants | 20-30 |
| Garages (Repair) | 20-30 |
| Garages (Showroom) | 6-8 |
| Garages (Storage) | 4-6 |
| Gyms | 6+ |
| Hospital Rooms (Sterilizing) | 15-20 |
| Hospital Rooms (Wards) | 6-8 |
| Hospital Rooms (X-Ray) | 10-15 |
| Kitchens (General) | 15-60 |
| Laboratories | 6-15 |
| Laundries | 10-20 |
| Lunch Rooms | 12-15 |
| Nightclubs | 20-30 |
| Machine Shops | 6-12 |
| 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 (Business) | 6-8 |
| Office Lunch Rooms | 7-8 |
| Office Copy Rooms | 10-12 |
| Office Computer Rooms | 10-14 |
| Paint Shops | 10-15 |
| Paper Mills | 15-20 |
| Photo Dark Rooms | 10-15 |
| Pig Houses | 6-10 |
| Police Stations | 4-10 |
| Post Offices | 4-10 |
| Poultry Houses | 6-10 |
| Precision Manufacturing | 10-50 |
| Public Buildings (Hallways) | 6-8 |
| Public Foyers | 8-10 |
| Public Restrooms | 10-12 |
| Public Smoking Rooms | 15-20 |
| Pump Rooms | 5+ |
| Railroad Shops | 4+ |
| Residences | 1-2 |
| Restaurants (Dining Area) | 8-10 |
| Restaurants (Food Staging) | 10-12 |
| Restaurants (Kitchens) | 30+ |
| Restaurants (Bars) | 15-20 |
| Retail | 6-10 |
| School Classrooms | 6-20 |
| Shoe Shops | 6-10 |
| Shopping centers | 6-10 |
| Shops (Machine) | 5+ |
| Shops (Paint) | 15-20 |
| Shops (Wood Working) | 5+ |
| Showers (Public) | 10+ |
| Showers (Private) | 6 |
| Substation (Electric) | 5-10 |
| Supermarkets | 4-10+ |
| Swimming Pools | 20-30 |
| Taverns | 20-30 |
| Textile Mills | 4+ |
| Toilets (Public) | 6-15 |
| Town Halls | 4-10 |
| Theatres | 8-15 |
| Turbine Rooms (Electric) | 5-10 |
| Waiting Rooms (Public) | 4 |
| Warehouses | 6-30+ |
| Wood Working Shops | 8+ |