Acoustic Ducting - 5m

If noise is an issue in your grow environment, the added use of acoustic ducting reduces the noise of a fan by around 40-60% and can be a cheaper option than silencers.

Acoustic ducting is made from a perforated inner core Ducting but with lots of small holes punched in it, this is then wrapped in a layer of 25mm fibre- wool insulation and sealed by another layer of aluminium foil. 

As the air travels down the inner core the sound is let out through the holes into the fibre- wool, which suppresses the sound.