Datasheet

34
Concepts
BASIC VENTILATION CONCEPTS
3
•
When localised extraction is required in the place where the contaminating source is, the flow (Q) will be determined
taking the following into account:
•
Surface area of the hood
•
Speed of catchment
•
Speed of transport by the recommended renewals system with regard to the number of people that there are
in the premises.
Q = 3.600*V*S = m
3
/h
Q = Necessary air flow (m
3
/h)
V = Speed of catchment (m/h)
S = Hood or ducting section (m
2
)
LOCALISED EXTRACTION GUIDE COOKER HOODS
Hood Class Speed Catchment in m/sec Calculation per m2 of Speed of
On hood surface surface area of the hood transport m/sec
4 sides open from 1 to 1,2 m/sec. 3.500 to 4.500 m
3
/h
from 6 to 10 m/sec.
3 sides open from 0,85 to 1 m/sec. 3.000 to 3.500 m
3
/h
2 sides open from 0,75 to 0,85 m/sec. 2.700 to 3.000 m
3
/h
1 side open from 0,5 to 0,75 m/sec. 1.750 to 2.700 m
3
/h