Need Help with ventilation first time grower

Hello friends pls help someone with expirience
I'm doing cloeset grow : Light is SF2000 with 100mm Prima Klima extraction fan (280 m3/h) with speed controler and carbon filter, so my question is:

*Can i put 120mm PC fan something like "Noctua" for my air intake will that be enough for optimal negative pressure? Because closet is fully sealed with silicone. btw my extraction fan is going to work on 50-60% power.
Tnx in advance

You shouldn't need an active intake in a small grow, passive intake should be fine.

coreywebster said:

You shouldn't need an active intake in a small grow, passive intake should be fine.

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Thank you,but if my extraction fan is not working all the time because it has thermostat which control temperature in closet, will the smells then come out from a passive intake hole if there is no intake fan? Tnx in advance

victori994 said:

Thank you,but if my extraction fan is not working all the time because it has thermostat which control temperature in closet, will the smells then come out from a passive intake hole if there is no intake fan? Tnx in advance

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Yes it would but really a good speed controller should never switch off and should run the fan on idol speed to prevent that.

However if it doesn't and does turn off then even with the intake the air been forced in while no air is been pulled out will create positive pressure and will push stinky air out anywhere it can anyway.

Really an extraction fan should never be off fully.

coreywebster said:

Yes it would but really a good speed controller should never switch off and should run the fan on idol speed to prevent that.

However if it doesn't and does turn off then even with the intake the air been forced in while no air is been pulled out will create positive pressure and will push stinky air out anywhere it can anyway.

Really an extraction fan should never be off fully.

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Thank you very much,i will listen to your advice and leave the extraction fan all the time on 50% power.

You can use some flex duct on the ports of your tent or closet whatever your in you need roughly two of them the same size as your exhaust fan on the end of the flex duct you can put spring controller dampers. Ideal air makes some.

Apalchen said:

You can use some flex duct on the ports of your tent or closet whatever your in you need roughly two of them the same size as your exhaust fan on the end of the flex duct you can put spring controller dampers. Ideal air makes some.

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Are you thinking on this? Tnx

Use a carbon scrubber and a mini split ac problems solved

I think the one you posted is electronic damper this one is spring loaded and won't allow back draft, they come in all different sizes for different duct.