Noise reduction - exhaust blower speed controller

Metacanna

Metacanna

Well-Known Member
Dear all,

I need to reduce the speed of my outake blower. How can I achieve this?
There are a few products on amazon to do this, but I'm not willing to pay 20$ or 30$ for such a simple piece of gear.
I wonder if it is safe for the blower to be dimmed at any given rate, AC and DC motors might burn if not run with adequate power, so, how should I know how much is it safe to dim?

I wonder if this would do it? http://www.ebay.co.uk/itm/Adjustable-2000W-Voltage-Regulator-Step-down-Power-Supply-Module-with-LED-Meter-/222183185688?hash=item33bb265d18:g:w0UAAOSw7XZXg3cN

Anyone experienced with similar cheap dimmers? What should I take in consideration?

Cheers!
 
Jonstipated

Jonstipated

Well-Known Member
I recommend using this.

https://www.amazon.com/gp/product/B006NGI8VS

(Not my) review
"You may want to get the 5-amp one if you think you may be using it on larger motors. If you just have an in-line 6" fan, plus a smaller fan or two, this is exactly what you need (big six inch inline fans only draw about 1.25 amps but can briefly sometimes draw close to 3 amps while starting up). In any case; do not waste your money on the cheaper type devices; as they do not work very well. Those devices put out a square wave that wastes power, makes noise, stresses your motor, and makes it impossible to slow the speed of the motor down to less that about 60% of its full speed -- any slower and you will hear that square wave, and see the motor come to a complete stop as you attempt to make it run at 20-40% of its peak speed."
https://www.amazon.com/gp/product/B006NGI8VS
 
ThumbSmasher

ThumbSmasher

Member
im not saying it's not worth it.. i'd just be surprised if OP spends $54 bucks on something he didnt wanna pay $20 for.


i have the "Active Air ACSC Duct Fan Speed Adjuster". $16. works great. got it on amazon.
 
coreywebster

coreywebster

Well-Known Member
Pick up a second hand variac or stop been a cheap skate and buy a new one. Grow room noise is an age old problem, your not going to solve it without spending something on the right tool for the job.
 
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