Ventilation frequency and minimum airflow rate for civil buildings
Publish Time : 2021-07-28 Author : Longde R&D
1. Minimum new flow for civil construction
| Room Type | Minimum new flow rate (m/h people) |
| cinema, theater, gymnasium, library, reading room, shop, museum, living room, classroom | 8.5 |
| Office, conference room, restaurant, doctor's office, general ward | 17 |
| Intensive care unit, operating room | 30 |
| Superior Hotel Room | 30 |
of 1) For high-end hotel rooms, when the bathroom exhaust volume is greater than the table listed on the value, should be based on the exhaust volume of fresh air volume, and should calculate the bathroom ventilation frequency to 5-8 times/h calculation.
2) Usually in public buildings and public roomsno smoking; luxury hotel rooms allow a small amount of smoking.
2. Ventilation frequency in primary and secondary schools
| Room Type | Ventilation frequency (time/hour) |
| Primary school classroom | 2.5 |
| junior high school classroom | 4 |
| Senior high school classroom | 6 |
| Chemical Laboratory | 10 |
| Toilet Bathroom Room | 10 |
| Gym | 10 |
| Health care room | 2 |
| Student Accommodation | 2.5 |
ventilation frequency is based on most school environmental health regulations per hour required ventilation rate calculation.
the prescribed ventilation rate (m/h) is: for primary school students -9, junior high school students -14.4, for high school students -21.6.
3. Central heating in cold and severely cold areas
| Room Type | Ventilation frequency (time/hour) |
| classroom | 1~1.5 |
| Chemical Laboratory | 3 |
| Bathroom | 5 |
| Gym | 3 |
| Health care room | 1 |
4. Ventilation frequency in nurseries and kindergartens
| Room Type | Ventilation frequency (time/hour) |
| Music and Sports Room Activity Room Living Room Bedroom Office Office | 1.5 |
| Bathroom Materials | 3 |
| Bathroom | 1.5 |
| Infirmary Isolation Room | 1 |
| Kitchen | 3 |
| Laundry Room | 5 |
5. Theater and Cinema
The minimum amount of fresh air in the auditorium can be selected as 7-10m ³/(H · person). When Co2 The content in the outdoor air is very low, the lower limit can be used, and when the content is high, the upper limit can be used [the allowable concentration of CO2 in the room, the steady state should be less than 0.0025m/m, and the amount of CO should be less2 the calculation of human emission is 0.02m ³/(h · man)].
When used as a long-term meeting place, it should not be less than 10m ³/(h · Person); if it is used for general cultural activities and intermittent, it can be 7m ³/(H · Person).
Select the displacement of the movie projector according to the following values: (the ventilation frequency of the projection room should not be less than 15 times/hour)
700m ³/(h unit) (arc lamp) 600m ³/(H · 3kW)(xenon lamp)
800m ³/(H · 5kW)(Xenon lamp)
6. Ventilation frequency in nursing homes and general hospitals
| Room Type | Intake ventilation time (time/hour) | Exhaust ventilation time (time/h) |
| Restore the bedroom | 3 | -1 |
| X-ray control room and darkroom | 2 | -3 |
| Treatment Room (Diagnostic) | - | -1.5 |
| Pharmacy, Distribution Room | 2 | -2 |
| X-ray room | 4 | -5 |
| Chinese medicine pharmacy, soup room | 1 | -3 |
| Treatment Room | 50~60m ³ (h · person) | 50~60m ³ (h · person) |
| Steam sterilization chamber dirty parts | - | -4 |
| Steam sterilization chamber cleaning department | 2 | - |
| Electrotherapy, Phototherapy, Spa Room | 4 | -5 |
| Laundry, Laundry, Washing, Ironing Room | 3 | -5 |
| Mud treatment room | 3 | -5 |
| convalescent canteen has about 200 seats | Summer 40m/(h people) | Winter 20m/(h person) |
| Soil storage and mud preparation room | - | -3 |
| Cooking room | - | -4 |
| Massage and Acupuncture Room | 1 | -2 |
| Crockery | - | -1.5 |
| Locker Room | 2 | -3 |
| Storage room | - | -1 |
| General Operating Room | 5 | -6 |
| Sanatorium Bathroom: Basin, Shower, Pool Bathroom | - | -5 |
1. Natural ventilation should be in general rooms, corridors, stairwells, etc.
2. Electrostatic treatment room of physical therapy department, ultraviolet room of phototherapy, wax melting room of wax therapy, mud therapy room, acupuncture room, western pharmacy and preparation room; dressing room and disinfection room of central supply room; machine room and dark room of radiology department; nutrition kitchen; soup room of traditional Chinese medicine pharmacy, etc. should be equipped with mechanical exhaust device.
3. For rehabilitation habits with more than 200 seats, mechanical exhaust should be provided.