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Calculation example of fresh air ventilation:
Computer room area S=60 (m2), net height h=3 (m), staff n=10(persons)
1. New air volume Q1=n.q=10*70=700(m3/h) if calculated according to the required new air volume per person.(q=70(m3/h) per person);
2. If the number of ventilation times of room fresh air is calculated, the number of ventilation times of room fresh air is p=5(times /h), then the new air quantity Q2=q.n=5*60*3=900(m3/h).
Due to Q2>Q1, Q2 is taken as the basis of equipment selection.
Indoor fresh air standards for different types of buildings
Hotel building | Entertainment building | office building | residential building | ||||
room type | air volume | room type | air volume | room type | air volume | room type | air volume |
Hotel Room | 30~50 | fitness room | 60~80 | office | 30 | apartment | 30 |
antechamber | 30~50 | Tennis room | 40 | High-level office | 30~50 | High-level apartment | 50 |
Restaurant/banquet hall | 15~30 | Card Room/ Billiard Room | 40~50 | reception room | 30~50 | shopping mall | 15~25 |
Coffee House | 20~50 | Swimming Pool | 50 | Telephone room | 30 | inpatient ward | 50 |
function hall | 15~25 | game center | 40~50 | Computer room | 30 | classroom | 11~30 |
Commercial area | 10~20 | Video halls | 20 | Copy room | 30 | exhibition hall | 20~30 |
lobby | 10 | massage room | 30 | laboratory | 20~30 | Theaters | 15~25 |
Beauty Salon | 35 | locker room | 30 | dance hall | 30 | ||
KTV | 30~50 | nightclub | 20 | Bar | 17~50 |
Room type | No smoking | small amount of smoking | Heavy smoking | ||||||
apartment | shopping mall | Computer room | inpatient ward | apartment | office | dining room | KTV | Meeting room | |
ventilation rate | 0.4~0.7 | 1.6~3.9 | 1.1~2.7 | 0.5~1.3 | 0.5~1.0 | 1.1~2.7 | 1.3~3.1 | 1.9~4.7 | 2.1~7.8 |
Smoking Level | Room Type | Fresh air volume | |
recommended value | least value | ||
A lot | Trading venues | 85 m3 | 51 m3 |
The Newsroom | 85 m3 | 51 m3 | |
Meeting room | 85 m3 | 51 m3 | |
Many | Bar | 51 m3 | 42.5 m3 |
General | Office | 25.5 m3 | 17 m3 |
Restaurant | 25.5 m3 | 20 m3 | |
Few | shopping mall | 25.5 m3 | 17 m3 |
No | Theaters | 25.5 m3 | 17 m3 |
Hospital | 34 m3 | 25.5 m3 |
Fresh air ventilation is the key to determine the selection of fresh air units. The fresh air system is normally open 24 hours. If the fresh air volume is too large, it may cause waste, and if it is too small, it may not reach the air exchange effect.
Yifil purification has professional fresh air system designers who will design new air system solutions according to users' usage habits and building environment. No matter what type of house/useable area, we can provide you with perfect solutions.