How often should I be running my exhaust?

outsidethebox

Active Member

Jan 3, 2011

• #1

Is there a general rule of thumb about how often you should clean the air from the room?

 

The Knuck

Active Member

Jan 3, 2011

• #2

24-7 to prevent powdery mildew during lights out and to kool during lights on

 

W Dragon

Well-Known Member

Jan 3, 2011

• #3

^^^^agreed 24/7

 

outsidethebox

Active Member

Jan 3, 2011

• #4

Does it matter that it will be strictly veg?

 

W Dragon

Well-Known Member

Jan 3, 2011

• #5

yeah you want to keep fresh air in there 24/7 humidity rises when the lights go out and you don't want problems starting like powdery mildue as mentioned by kanuck above

 

The Knuck

Active Member

Jan 3, 2011

• #6

if you have a lights out time and REALLY want to shut it off you can while lights off for a bit.
but the exhaust is taking air out of your room wich causes fesh air to come in brining C02 and your plants need it to grow.

 

buddwasher

Active Member

Jan 3, 2011

• #7

yeah im a 24/7 guy aswell although there is a formula reccommended something like u have your exhaust has to vent x3 the cubic measurement of your room every hour

i have to 24/7 as i have a humid grow space that has a gas heater in it (also adds moisture) beacuse my grow room too cold else

gl dude

 

outsidethebox

Active Member

Jan 3, 2011

• #8

Thanks guys, if anyone knows the formula mentioned I would be interested to see it.

 

The Knuck

Active Member

Jan 3, 2011

• #9

its more for the fan your rooms L X W X H = room cubic footage, many will want a fan that can move the air 3 times a minute

so my veg room is 4 X 4X 8 = 128 a 400 cfm fan will do it nicely

 

outsidethebox

Active Member

Jan 3, 2011

• #10

Ah I see. I was originally thinking I would have the exhaust fan on a timer and have it come on and off but I will deff consider keeping it on 24/7 now.