Extraction question

[JJ]

Like I said before...see how easy this shit is,,,yea ok

[ncrypta.core]

For me in veg tend to have my extraction off only comes on if humidity get to high I’ve set so it does to keep the air moving but once hits flower stick it on 24/7 even tho smell happens for me week 4-6+

To make sure you have neg pressure you have to find out how much air your tent holds with an hour. So difficult but really easy

WxLxH=??x60mins= max air per hour

So example.

1.2mx1.2mx2m=2.88
Then
2.88x60=173m3/h

If your included a filter add 25% to 173 to compensate

173x1.25 = 216m3/h

If you want intake it’s minus 25% instead of adding

Now you have what max air will be in there it’s ideal to run you fan between 50-75% power

Fan plus filter
To work out what power you’ll have when inculcating filter you take 25% from your fan m3/L will tell you on your fan somewhere or box or shop

Example
Ac infinity 4” 348m3/h
348x0.75= 261

This fan would need to round at about 80% power

Next size up 6” 683m3/h
683x0.75=512

This fan would run at 40% power

This would almost guarantee no positive pressure so everything from your tent would have to go through a filter before it leaves the area.

Hope this makes sense

[Vador]

My extraction fans are always running. From seedling -flower.

[Captain Beefheart]

my exhaust has been on constant now for 2 yrs. the answer is from day 1.