Itís possible to order
the fans with a soundproof cover "at sight."
The soundproofing consists
of applying on the case a high noise absorption cover; this expedient allows to
low the average noise up to 10 db(A) (according to the type of fan) and it
results cheaper than other methods (i.e. soundproofed boxes).
Additionally it is also
convenient to climb on a silencer on the fan outlet or fan inlet that allows a
further average lowering from 3 to 8 db(A).
The pictures show the VC
HL 50 with silencer on the fan outlet and butterfly regulation shutter on the