If there are high demands for low noise level
we recommend either to bolt two silencers together or to
use fan type RSI together with the silencers.
N.B. LHG Kanalfläkt's silencers are specially constructed
to be mounted directly to the supply and/or exhaust of a
rectangular duct fan without creating unnecessary pressure
drops because of turbulence. (With silencers constructed
with baffles this problem is a fact.)
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