9/22
TF5774_C
Aereco S.A.
CASE OF DUCTS GROUPED UNDER 2 FANS
For all grouped duct configurations, an adaptation plenum is necessary.
▪
The plenum, even if made in a single piece, must provide 2 distinct volumes, perfectly sealed from one another.
▪
For each of the 2 units, the plenum must provide a circular outlet Ø350 mm centred as closely as possible on the
grouped duct.
▪
Ensure a minimum height of air between the end of the stack and the outlet section Ø350 mm, that is to say 120 mm
or 180 mm.
▪
The fans must be centred on the outlets Ø350 mm.
▪
Each Ø350 mm outlet must be at least 1,000 mm from the other and at least 500 mm from the bulkhead separating
the volumes.
The plenum must provide 2 virtual platforms measuring at least 800 x 600 mm each (see example below).
Example of grouping of 8 individual ducts:
LIMITS
All the following cases must be avoided, because they would lead to non-compliance with European
EMC requirements or non-compliant aeraulic performance or deterioration of the equipment or of
the ventilation system.
•
It is forbidden to install more than 2 fans per stack.
•
The stacks (1 or 2 fans) must be at least 3 m apart (distance from the outer edge of the fan
to the outer edge of the nearest fan of the other stack)
