Lowering voltage to ventilator - noise issue.

greenpriest024

greenpriest024

Active Member
Hello all,
I have posted on the issue before, and regarding noise was told the best options were a silencer, a dimmer and bungee cords. Silencers are too expensive for me at the moment, and while bungee cords improved the problem, noise is still very much an issue as my grow room is in my bedroom.
The dimmer seemed like the most attractive idea, however dimmers run from 60w upwards, and my ventilator is 25w. I was wondering if anybody knows how I can lower the voltage that's going to my ventilator to help control the noise. In particular I'd thought of wiring a variable resistor (rheostat) into my ventilator circuit; the problem is that I don't really know enough about electronics to know what type of rheostat I should order, or for that matter where to put it.
my ventilator is a 25watt 125 Domus axial wall fan, the standard kind used in bathroom ventilation.
I sincerely hope I may find some advice as the walls in my house are thin, and there's the chance my neighbours may find the sound of a bathroom ventilator in my bedroom suspicious lol.. Thanks a lot guys i appreciate any advice given...
 
Hairy Bob

Hairy Bob

Well-Known Member
I do find it hard to believe that a bathroom fan would produce enough noise to arouse any suspicion if it is in a good state of repair. However if you do feel it is too noisy, why not enclose the fan in a wooden box? Hang the fan from bungee cords inside (or suspend the box itself) and duct in through either side. Add insulating foam if you feel it needs any more damping.
 
Serapis

Serapis

Well-Known Member
greenpriest024 said:
Hello all,
I have posted on the issue before, and regarding noise was told the best options were a silencer, a dimmer and bungee cords. Silencers are too expensive for me at the moment, and while bungee cords improved the problem, noise is still very much an issue as my grow room is in my bedroom.
The dimmer seemed like the most attractive idea, however dimmers run from 60w upwards, and my ventilator is 25w. I was wondering if anybody knows how I can lower the voltage that's going to my ventilator to help control the noise. In particular I'd thought of wiring a variable resistor (rheostat) into my ventilator circuit; the problem is that I don't really know enough about electronics to know what type of rheostat I should order, or for that matter where to put it.
my ventilator is a 25watt 125 Domus axial wall fan, the standard kind used in bathroom ventilation.
I sincerely hope I may find some advice as the walls in my house are thin, and there's the chance my neighbours may find the sound of a bathroom ventilator in my bedroom suspicious lol.. Thanks a lot guys i appreciate any advice given...
Click to expand...
If you are able to lower the CFM and still get desired ventilation, take a look at this..

http://www.drugs-forum.com/growfaq/1659.htm
 
greenpriest024

greenpriest024

Active Member
thank you man that was very helpful - to think i was considering emailing the ventilator company for circuit diagrams lol...
 
N

NoDrama

Well-Known Member
Just get some nice 6-1/4" faced R19 insulation and wrap it around the fan, shit works great to kill noise, best part is its cheap as fuck. Use some 6" ducts to keep insulation out of fan and you are golden.

If you had a humidifier/dehumidifier/oscillating fan/portable heater plugged in would your neighbors be suspicious of you? I very very highly doubt a fart fan is going to arouse anyone.
 
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