Fan stronger than filter ?

[plantsinpants]

I have a 8" inline fan that is rated at 720cfm and I bought a 8" carbon filter that fits well and seems to work fine but I had never checked the filter cfm rating and later found out the filter is only rated up to 650cfm, is this enough to cause problems or does sucking air through the filter slow the fan down enough to compensate?

 

[whitebb2727]

It will cause problems. Get a variac to slow the fan.

http://wwwB006NGI8VSm/Variac-Variable-Transformer-300va-Output/dp/B006NGI8VS

I use this one. Those cheap speed controllers are hard on the motor.

 

[plantsinpants]

It will cause problems. Get a variac to slow the fan.

http://wwwB006NGI8VSm/Variac-Variable-Transformer-300va-Output/dp/B006NGI8VS

I use this one. Those cheap speed controllers are hard on the motor.

I have been thinking about speed controllers ,,, how much do they go for?

 

[whitebb2727]

The one I listed is $65. It is a variac. It controls voltage.

The cheap speed controllers start and stop the motor a few times a second. It is hard on motors and can make them humm.

The other option is to add a second filter. Suck in one, blow out the other. The second filter could be a cheap brand like ventech. That would cut the cfm that each filter gets and make them last longer.

I got two on mine. I got some cheese that stunk so bad I had to.

 

[Velvet Elvis]

I have been thinking about speed controllers ,,, how much do they go for?

harbor freight sells them for there saws like 20$ same exact as hydrofarm one.

 

[thumper60]

harbor freight sells them for there saws like 20$ same exact as hydrofarm one.

been running this hasn't turn off more than a year now no hum just smooth

 

[plantsinpants]

been running this hasn't turn off more than a year now no hum just smooth

What type of fan do you run it on?

 

[thumper60]

inline with filter name brand active air

 

[plantsinpants]

inline with filter name brand active air

Cool thx,,, i imagine it would work on a 8" fan even if its a litle higher wattage than a 6"

 

[sixspeedv]

I've got one of the cheap speed controllers that is made by same company as the exhaust fan. Makes a humming noise if you barely move the speed controller up. Had them send a new one and it does same thing. Going to get a variac now. Thx