can i turn ventilation off when the lamp is off?

[Bmw1000c]

Hello guys

Can i turn off the ventilation when there is no light on the growroom?

 

[cirog]

I do without a problem, plants handle it fine.

 

[geopolitical]

You can but it's not a great idea. Plants breathe in the dark too.

 

[rick shaw]

As long as it's not to packed in there. Remember humidity climbs when temps go down and charcoal filters lose ability in humidity,I forget what percent
I run a 4x8x6 FULL only got PM once,since then exhaust is 24/7. Never had it again.

 

[rick shaw]

double post,D'oh

 

[SMOKE-ONE]

I think its better to exhaust 24/7 because of security reasons.If you keep a negative pressure on your room,with all the smelly air going thru your filter,you're less likely to leak any smells.Aside for the fact of controlling your humidity and having better odds against getting PM and mold.Just my 2 cents.

 

[thinkin]

run ventilation 24/7 !

bud rot prevention! (that alone is worth it!)
and plants "breath" during the night (give 'em fresh air!)

 

[FreezerBoy]

I think its better to exhaust 24/7 because of security reasons.If you keep a negative pressure on your room,with all the smelly air going thru your filter,you're less likely to leak any smells.Aside for the fact of controlling your humidity and having better odds against getting PM and mold.Just my 2 cents.

Smoke-one for the win!

 

[rives]

As mentioned above, it is a good idea to keep the fan going 24/7 for all of the reasons that were brought up. However, I used a GroZone Temp-2V to slow the fan down when the lights were off because there was no need to move the heat away and the carbon filter should last longer because it is filtering less air.

http://cheaphydroponics.com/store/climate-controllers/grozone-temp-2v/prod_850.html

 

[FreedomFightr]

I think the best way to run a room is to run it sealed while the lights are on and vented went lights go out.

 

[PondeLftHndSide]

Keep that air stirred and flowin', man. Leave the vents and the oscillators running. When your canopy is full, you don't want one minute of stale or overly humid air, you're just inviting PM and botrytis.

 

[trichrider]

think 'outside' air movement unrestricted.

stale humid air will reduce growth, especially in conjunction with cool temps, and may lead to overwatering problems...

fan 24/7.

 

[compost]

I run my room ventilation when the lights are on through a 750CFM fan hooked up to a filter with 47 lbs of carbon. When the lights shut off the dampers close and a few minutes later a timer turns on. Connected to the timer is a dehumidifier, a separate small carbon filter and fan, a window AC unit, and a fan. When the room is on there is no smell. When the room is off it is sealed pretty damn good and there is no smell. If you aren't gonna run ventilation during lights out you should have dampers to help keep things under control.