Airflow Instruments PAN300 Series, Руководство по эксплуатации и обслуживанию

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22 Appendix B
The scope of the standards listed above includes many items other
than duct leakage. This summary, however, is limited to duct
leakage testing.
EU Standards
Ductwork classification and maximum air leakage. Note that EN1507,
EN12237 Eurovent 2/2 and DW/143 all have the same formula to
determine f
max
, the Air Leakage Limit, although DW/143 uses units of
l/s/m
2
whereas others use m
3
/s/m
2
.
•
EN 1507 (rectangular ductwork)
Air
Tightness
Class
Air Leakage
Limit (f
max
)
m
3
/s/m
2
Static Pressure Limit (p
s
) Pa
Negative
Positive at
pressure class
1 2 3
A 200 400
B 500 400 1000 2000
C 750 400 1000 2000
D* 750 400 1000 2000
* Class D ductwork is only for special apparatus
•
EN12237 (circular ductwork)
Air
Tightness
Class
Air leakage
limit (f
max
)
m
3*
/s/m
2
Static Pressure Limit (p
s
)
Pa
Negative Positive
A 500 500
B 750 1000
C 750 2000
D* 750 2000
* Class D ductwork is only for special apparatus