A duct silencer for an inline fan reduces the rush of air leaving the fan and travelling through the ducting, often the most annoying part of a grow tent's noise. It fits inline, in the same diameter as the fan. Here you will find the Can-Filters Silencer in 125, 160 (long version) and 200 mm.
The noise of an extraction system has several sources, and a silencer deals with one of them. Before buying, check where the noise comes from:
| Source of noise | Remedy |
|---|---|
| Rush of air in the duct and at the outlet | Silencer after the fan, short ducting, few bends |
| Vibration on the tent and walls | Fan hung on straps or anti-vibration mounts, not touching the frame |
| Motor at high speed | EC fan with some headroom, run at reduced speed |
| Fan too small | Larger-diameter model running more slowly |
If the fan is old or too small for the tent, it is worth replacing: among the inline fans there are EC models and acoustically insulated versions.
The Can-Filters Silencer 160 is the long version: more length usually means more attenuation, but it needs more space along the duct.
Acoustic ducting mainly reduces the noise passing through the duct wall; the silencer works on the rush of air along the duct. In a bedroom or a flat the two are often combined: silencer right after the fan, insulated ducting to the outlet. If you want a matched system, the EC-driven ventilation kits are already quiet at low speed.
All prices are in Swiss francs including Swiss VAT. We ship throughout Switzerland with Swiss Post; bulky parcels go by courier. To work out where the noise in your set-up comes from, email our support team or call +41 79 359 67 58: Gro.w.LaB also gives advice in the shop in Quartino, by appointment.
Hang the fan on straps, use short ducting, run an EC motor at reduced speed and add a silencer after the fan.
Directly after the fan, on the exhaust side, in the same diameter as the fan.
Slightly, like any length of duct, but far less than a tight bend or a long duct. If the fan has some headroom you will not notice it.
The silencer is more effective against the rush of air, acoustic ducting against noise coming through the duct wall. Using both gives the best result.
