Provides a classification of the systems, the definition of minimum requirements and the values of the reference quantities during operation.
It is applied to aeraulic systems designed for people’s comfort and installed in closed buildings, except for:
The standard is currently under revision and as for the classification of the indoor and outdoor air quality, the concepts of the EN 13779 standard have been implemented and the classification is essentially the same:
Category | Description |
---|---|
ODA1 | Pure outdoor air that may temporarily contain dust (e.g. pollen) |
ODA2 | Outdoor air with a high concentration of particulate substances |
ODA3 | Outdoor air with a high concentration of gaseous pollutants |
ODA4 | Outdoor air with a high concentration of solid particles and gaseous pollutants |
ODA5 | Outdoor air with a very high concentration of solid particles and gaseous pollutants |
Category | Description |
---|---|
IDA 1 | High |
IDA 2 | Average |
IDA 3 | Moderate |
IDA 4 | Low |
Recommended filters in accordance with UNI 10339:
Unlike the current UNI 10339 standard, its updated version identifies the minimum filtering class not just based on the building’s intended use, but also in relation to the desired quality level for indoor air and the available outdoor air quality.
Moreover, if there are known specific pollutants, a reduction system associated with the additional ventilation circuit must include at least a filter with a certified effectiveness on such pollutants.
The UNI 10339 standard provides information also about when the filter must be changed:
“the replacement of mechanical particulate filters usually depends on clogging, which is indicated by the final pressure drops. However, for the purposes of hygiene pre-filters and filters must be inspected periodically in accordance with current laws and the instructions of the manufacturer. They must be replaced when biological contamination appears, even if the pressured drops are still considered acceptable”.
Building category | ODA level | Indoor air quality | Minimum number of filtering stages | ||
---|---|---|---|---|---|
IDA1 | IDA2 | IDA3 | |||
BUILDINGS USED FOR RESIDENTIAL PURPOSES AND SIMILAR | 1 2 3 |
F6 F7 F8* |
F5 F6 F6* |
G4 F5 F5* |
2-1 2 2* |
HOTELS | 1 2 3 |
F7 F8 F8* |
F6 F7 F7* |
F5 F6 F6* |
2 2 2* |
BUILDINGS FOR OFFICES AND SIMILAR | 1 2 3 |
F7 F8 F8* |
F6 F7 F7* |
F5 F6 F6* |
2 2 2* |
HOSPITALS, CLINICS AND SIMILAR | 1 2 3 |
F7 F8 F8* |
F6 F7 F7* |
F5 F6 F6* |
2 2 2* |
STERILE ROOMS AND INFECTIOUS DISEASES UNITS, MATERNITY, ANAESTHESIA, X-RAY AND PREMATURE BABIES UNITS, OPERATING THEATRES AND SIMILAR | 1 2 3 |
H14 H14 H14* |
H13 H13 H13* |
H12 H12 H12* |
3 3 3* |
BUILDINGS USED BY ASSOCIATIONS AND FOR RELIGIOUS PURPOSES | 1 2 3 |
F7 F8 F8* |
F6 F7 F7* |
F5 F6 F6* |
2 2 2* |
ROOMS USED FOR RECREATIONAL ACTIVITIES | 1 2 3 |
F7 F8 F8* |
F6 F7 F7* |
F5 F6 F6* |
2 2 2* |
COMMERCIAL BUILDINGS AND SIMILAR | 1 2 3 |
F7 F8 F8* |
F6 F7 F7* |
F5 F6 F6* |
2 2 2* |
SPORTS FACILITIES AND SIMILAR | 1 2 3 |
F7 F8 F8* |
F6 F7 F7* |
F5 F6 F6* |
2 2 2* |
BUILDINGS FOR SCHOOL-RELATED ACTIVITIES | 1 2 3 |
F7 F8 F8* |
F6 F7 F7* |
F5 F6 F6* |
2 2 2* |
* Add a filter for gaseous pollutants |
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