HOW TO USE FAN SILENCERS
You will want to attach your silencer just after the fan in the extract duct run, to soak up any noise generated by the motor. Ideally it will be connected with a fast clamp to ensure a nicely sealed, air tight connection. Then simply connect your ducting as your normal and run it to the usual place.
Bear in mind that the acoustic foam will slightly reduce the air flow rates throughout your system. It will not be by much, but there will be a small drop in the overall airflow rates.
Also worth considering if noise is a concern is to make sure that your ducting is pulled as straight and as tightly as possible. Not only will this reduce any extra noise generated from turbulence in the ducting, it will also help to improve the overall air flow rates.
Manufacturability
Material:
Z275 galvanized steel sheet
0.8 to 1.0 mm thick aluminium sheet
1.4301 stainless steel sheet
1.4404 stainless steel sheet
Other stainless steel sheet grades: please submit a request
for quotation to determine manufacturability.
Number of baffles:
Silencer with 1 baffle: 2 half-baffles at the duct sides
Silencer with 2 baffles: 1 full baffle + 2 half-baffles at the duct sides
Silencer with 3 baffles: 2 full baffles + 2 half-baffles at the
duct sides
Silencer with 5 baffles: 4 full baffles + 2 half-baffles at the
duct sides
Baffles:
Mineral wool: rock or glass wool; other insulators, e.g.
expanded PVC or as supplied by the customer.
Baffle thickness: 40 mm to 300 mm with type N3 lining or
type G9 washable lining.
Mineral wool density: 40 to 100 kg/m3.
The baffle front breast is curved to reduce the air flow
turbulence and pressure loss.
Dimensions:
PQ frames: see the standard dimensions of square ducts. Other
versions are available on request.
Front-to-back baffles: stops 1 to 3 cm before the PQ angle
at the edge.
