The WHO (World Health Organization) recommended dust collection limits are as follows:
AMBIENT AIR
ODA 1
Ambient air that may temporarily contain pollution.
ODA 2
Ambient air with a high concentration of particles.
ODA 3
Ambient air with very high concentrations of particles.
INTAKE AIR
Recommendations for selecting supply air filters.
GENERAL VENTILATION |
|
SUP 1 |
– |
SUP 2 |
Permanently used roomsFor example: Kindergartens, schools, offices, hotels, houses, meeting and conference rooms, exhibition, theater, cinema and concert halls. |
SUP 3 |
Temporarily used roomsFor example: Warehouses, shopping malls, laundries, server rooms. |
SUP 4 |
Short-term roomsFor example: Warehouses, toilets, stairs. |
SUP 5 |
Rarely used roomsFor example: Landfills, data centers, underground car parks. |
INDUSTRIAL VENTILATION |
|
SUP 1 |
Rooms with high hygiene requirementsFor example: Hospitals, pharmaceuticals, optics and electronics. |
SUP 2 |
Rooms with medium hygiene requirementsFor example: Food industry. |
SUP 3 |
Rooms with normal hygiene requirementsFor example: Premises in the food industry where there are no high standards of hygiene. |
SUP 4 |
Rooms without hygiene requirementsFor example: Car and repair shop premises. |
SUP 5 |
Heavy industry production areasFor example: Steel mills, metal smelters and welders. |
SUMMARY
AMBIENT AIR |
INTAKE AIR |
||||||
SUP1PM2,5≤2,5 |
SUP2PM2,5≤5 |
SUP3PM2,5≤7,5 |
SUP4PM2,5≤10 |
SUP5PM2,5≤15 |
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Category |
PM2,5 |
PM10 |
ePM1 |
ePM1 |
ePM2,5 |
ePM10 |
ePM10 |
ODA1 |
≤10 |
≤20 |
60% |
50% |
60% |
60% |
50% |
ODA2 |
≤15 |
≤30 |
80% |
70% |
70% |
80% |
60% |
ODA3 |
>15 |
>30 |
90% |
80% |
80% |
90% |
80% |