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Exhaust fan

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#1 Guest_whitemike420_*

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Posted 07 October 2005 - 10:51 PM

How can I make my exhaust fan quite some my room mates wont hear the buzzing noise?

#2 Guest_Peter Cottontail_*

Guest_Peter Cottontail_*
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Posted 08 October 2005 - 01:43 PM

I assume you mean quiet. What type of exhaust fan? If it's a DC motor, you might put a rheostat in series with one of the wires to slow it down. If an AC motor, you can get a motor speed controller to slow it down. However, if you're using it in a grow area, I would just suggest leaving the lid or door open a bit for air exchange. A fan is not necessary, neither is it necessary to filter air entering or leaving a grow area.

#3 elixir



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Posted 08 October 2005 - 03:53 PM

I assume you are referring to growing plants, given the forum and your nickname. A couple main things will keep things quieter for you:
- Use a squirrel cage fan: Axial fans (used in computers) are traditionally louder. Make sure you get a good squirrel cage (blower) fan. They have more static pressure which is great for air filters as well run more quietly.
- Insulate the fan mount: Vibration from the fan unit can transfer to the material the fan is attached to, essentially making it a large speaker. If you are bolting the fan to wood you can use rubber washers in conjuction with a foam moulding. Both are readily availble at home depot and provide excellent protection against vibrations. Another option is to mount the fan by bungee cords in the air. A little more work to get it looking nice but its unsurpassed in vibrational noise elimination.
- Minimize turbulence: Turbulence can create a lot of noise and also slow down air speed. If possible, use non-ribbed ducting for your fans. The coil ones your dryer uses are very turbulent and create backpressure. Best low-cost options are either PVC or sheel metal ducting.
- Ensure there is adequate clearance: Don't put your input/output vents against a wall or under furniture. You need at least the fans diameter of clearance to make sure it can suck in an adequate amount of air.

Anyway, basically minimize the amount of "turning" your air has to do, even if it means it has to go farther.

Good luck and be safe. Growing with roommates is generally considered dangerous. Many would advise against it but if you're dead set, be extremely careful.

#4 Hippie3



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Posted 08 October 2005 - 03:57 PM

another ploy is some white noise to mask sounds,
i found an aquarium bubbling away hid minor noises nicely

#5 Guest_whitemike420_*

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Posted 13 October 2005 - 03:19 PM

Thanks friends..

#6 sadsoul



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Posted 16 October 2005 - 01:21 PM

A speed contoll will help alot if its a cage blower or in line fan......

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