cheap fan speed controllers and centrifugal fan

timer getting hot and fan no longer turning on

  • risks on plugging the fan derect to wall socket

    Votes: 1 100.0%

  • the right speed controller

    Votes: 0 0.0%
  • Total voters
    1
whitebb2727

whitebb2727

Well-Known Member
Lordhooha said:
Any old controller from your local grow store should be fine.
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Not really. That's the problem. Most those cheap controllers aren't meant to be used on brushless inline fans.

Kipn said:
off topic question not even sure if this is a thing. can i salvage my carbon filter. it is a 8 inch filter and i intend on dropping down to a 4 inch extract fan is there a way i can get an adapter to go from 8 to 4 inchs and if i was to do so would there be enough pressure passing through an over sized filter
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Yes. Also get a variac to control fan speed.
DSC01480.JPG
The larger filter on smaller fan will last longer. The variac is a variable transformer. They cost more but are easier on inline fans.
 
Kipn

Kipn

Well-Known Member
whitebb2727 said:
Not really. That's the problem. Most those cheap controllers aren't meant to be used on brushless inline fans.


Yes. Also get a variac to control fan speed.
View attachment 4055059
The larger filter on smaller fan will last longer. The variac is a variable transformer. They cost more but are easier on inline fans.
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variac i was hopping someone would bring that up but to be honest after looking up the cost of one of them over a smaller fan the fan probably the better option for me considering i will hopefully not need to deal with such pressure building up in my tent as the current fan can easily destroy my tent when its on full if its 100% sealed hints the reason for limiting the speed to begin with. so running a bigger filter and smaller fan should be ok in you experience. the only thing i can imagine is that the fan will run harder then it should ??
 
kingtitan

kingtitan

Well-Known Member
Like I said on your profile, get a Variac, its 50 bucks. Keep your big fan and turn it down and adjust as you grow. A big fan slowed down runs a lot quieter than a small fan running full blast (usually 2800 RPM range).
 
Kipn

Kipn

Well-Known Member
kingtitan said:
Like I said on your profile, get a Variac, its 50 bucks. Keep your big fan and turn it down and adjust as you grow. A big fan slowed down runs a lot quieter than a small fan running full blast (usually 2800 RPM range).[/QUOTE
hi yes i do understand you told me that and i do thank you for the information .can you suggest one i should buy. i did attempt to google a few but was stumped also found a problem that the plugs didn't seam compatible with my sockets
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Jaybodankly

Jaybodankly

Well-Known Member
Problem with a fan speed controller is you need to adjust it as the weather changes if you are drawing outside cool air. Better to put it on a thermostat and have it cycle on and off at full speed.
 
Kipn

Kipn

Well-Known Member
Jaybodankly said:
Problem with a fan speed controller is you need to adjust it as the weather changes if you are drawing outside cool air. Better to put it on a thermostat and have it cycle on and off at full speed.
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temp isnt really a problem for me too small a grow room and over sized fan is mine. with my current set up running a big fan on full is too much for the room to handle. the thing that i disslike is not being told by anyone that using a cheap and or incorect speed controller could be dangerous. like most people once a timer is set and everything is running fine for several moths one tends to stop checking stuff as often. i do understand electrical faults happen and can happen to any product
 
whitebb2727

whitebb2727

Well-Known Member
Kipn said:
variac i was hopping someone would bring that up but to be honest after looking up the cost of one of them over a smaller fan the fan probably the better option for me considering i will hopefully not need to deal with such pressure building up in my tent as the current fan can easily destroy my tent when its on full if its 100% sealed hints the reason for limiting the speed to begin with. so running a bigger filter and smaller fan should be ok in you experience. the only thing i can imagine is that the fan will run harder then it should ??
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I got my variac for around 50 bucks. The bigger filter is actually easier on a smaller fan. As you go up in filter size it actually reduces the work load on the fan. It also has the added benefit of better smell control.

I use both a variac and a 8 inch filter on 4 inch fan.

There are a lot of people that report the inline fans working just fine on cheap controllers. I just wouldn't do as its not recommended.
 
Kipn

Kipn

Well-Known Member
whitebb2727 said:
I got my variac for around 50 bucks. The bigger filter is actually easier on a smaller fan. As you go up in filter size it actually reduces the work load on the fan. It also has the added benefit of better smell control.

I use both a variac and a 8 inch filter on 4 inch fan.

There are a lot of people that report the inline fans working just fine on cheap controllers. I just wouldn't do as its not recommended.
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i have decided on the following im a get a smaller fan and neck down to filter until i can save for a variac as i am unsure on the price difference between states but a variac is around $250 where i am located according to any google search i can do. thanks for the help with information on duct reducer . i don't think i am willing to even attempt to use a cheap speed controller ever again although this is the 1st time hearing of this happening. got to love sales people they will sell anything with out warning
 
whitebb2727

whitebb2727

Well-Known Member
Kipn said:
i have decided on the following im a get a smaller fan and neck down to filter until i can save for a variac as i am unsure on the price difference between states but a variac is around $250 where i am located according to any google search i can do. thanks for the help with information on duct reducer . i don't think i am willing to even attempt to use a cheap speed controller ever again although this is the 1st time hearing of this happening. got to love sales people they will sell anything with out warning
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Wow. What country are you in? Look up "variable transformer". Shoukdnt need one over a few amps.

The smaller fan will work as well.

Of course you could just not use a timer. I run my fan and filter round the clock.
 
Kipn

Kipn

Well-Known Member
whitebb2727 said:
Wow. What country are you in? Look up "variable transformer". Shoukdnt need one over a few amps.

The smaller fan will work as well.

Of course you could just not use a timer. I run my fan and filter round the clock.
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an expensive state apparently the timer wasn't the problem it was the victim
 
ANC

ANC

Well-Known Member
If you want to be safer, get a contactor (its a is a big arse relay).
You get them up to sick Amp ratings, and they can be as little as $5 or less
This way your timer is never stressed.
 
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