How to silence/lower exhaust fan noise

Discussion in 'Grow Room Design/Setup' started by thebigdc, Sep 16, 2009.

  1. I am using a freezer as a growbox.
    I have installed a 120mm 205CFM case fan to exhaust the hot air.
    The exhausing part works but that fan puts out some serious noise when blowing air out. How can i lower the sound of the exhaust? Right now you can hear it thru the garage wall. This is the last obstacle for me to start my very first grow.

  2. I would try ambient noise. Pick up a couple of cheap water pumps at the home store and a tub, (maybe 25 galons,) put pumps in tub, plug in and listen to flowing water.):)
  3. P.S You Need To Cover The Pumps With Water.:wave:
  4. Increase the fan size by 30% and add a variable speed control to the fan. Run the fan at a low speed. With the increased fan size you will move the same amount of air with less noise from the fan. Also reduce bends in duct work.

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