• Home
  • Forums
  • Medical Cannabis Cultivation
  • General Indoor Growing
  • ACI infinity help with setup vpd

ACI infinity help with setup vpd

  • Thread starter Thread starter lizto
  • Start date Start date Dec 19, 2024
  • Tagged users Tagged users None

ACI infinity help with setup vpd

lizto Dec 19, 2024 23 Replies 8,140 Views
Page 2 of 2 · Replies 21–24 of 24
Prev
  • 1
  • 2
First Prev 2 of 2

LoveGrowingIt

Supporter
Posts
4,735
Reactions
8,151
Joined
Jul 19, 2023
Points
263
Dec 25, 2024
#21
About air exchange, especially for smaller tents... There's that never-ending dilemma about heating and humidifying the air in a tent, only to pump that air out. I can't think of a good reason to do that. Devices working against each other aren't good for the electricity bill. So, I either run the exhaust fan on low or cycle it on and off, depending on the size of the tent, and the size and life-stage of the plant(s) in the tent. I have one 28"x28"x74" tent that always runs hot, so that tent's exhaust has more work to do. I've never figured out why that tent is so hot all the time, even with different lights. I even moved the driver out of the tent, and it didn't make a difference.

As for VPD, I check it often, but I don't use it to control my tent's environment. The VPD is often the first thing I look at because it's a quick way to check the tent's internal environment, and I target specific VPD ranges. If it's out of range, I tweak the temperature or the humidity.
 
Reactions: PooToe
Quote Reply

PooToe

Posts
556
Reactions
1,127
Joined
Feb 6, 2024
Points
143
Dec 25, 2024
#22
LoveGrowingIt said:
About air exchange, especially for smaller tents... There's that never-ending dilemma about heating and humidifying the air in a tent, only to pump that air out. I can't think of a good reason to do that. Devices working against each other aren't good for the electricity bill. So, I either run the exhaust fan on low or cycle it on and off, depending on the size of the tent, and the size and life-stage of the plant(s) in the tent. I have one 28"x28"x74" tent that always runs hot, so that tent's exhaust has more work to do. I've never figured out why that tent is so hot all the time, even with different lights. I even moved the driver out of the tent, and it didn't make a difference.

As for VPD, I check it often, but I don't use it to control my tent's environment. The VPD is often the first thing I look at because it's a quick way to check the tent's internal environment, and I target specific VPD ranges. If it's out of range, I tweak the temperature or the humidity.
Click to expand...
Moving moisture, heat and expelled gasses............
 
Quote Reply

LoveGrowingIt

Supporter
Posts
4,735
Reactions
8,151
Joined
Jul 19, 2023
Points
263
Dec 25, 2024
#23
PooToe said:
Moving moisture, heat and expelled gasses............
Click to expand...
Removing excessive heat is probably the best reason to exhaust air. I doubt there's much impact regarding gases. The main gases are oxygen and carbon dioxide that are exchanged through transpiration and respiration. Both are expelled by and used by the plants. As for moisture, if the humidity is in the desired range (and there are circulation fans in the tent), I don't foresee a moisture problem.

I just think exhaust, which is better thought of as air exchange, tends to be overemphasized. If the air in the tent is replaced several times a minute, why even bother having a heater or a humidifier in the tent? At that point, we should be talking about the lung room environment, which tent controllers don't directly control. So, aside from controlling excessive heat, my thinking is that the key factor for a tent environment is maintaining a relatively low rate of air exchange. I don't know what that rate should be, but I suspect it depends on the size and life stage of the plants in the tent. I doubt replacing the air several times a minute is necessary.

Every situation is different, though, which makes it impossible for me to say precisely what's best for someone else. My largest tent only has 48 cubic feet of air without adjusting for the space taken up by the things in the tent. Even a 4" fan can pump a lot more than 48 CFM.
 
Reactions: lizto and PooToe
Quote Reply

PooToe

Posts
556
Reactions
1,127
Joined
Feb 6, 2024
Points
143
Dec 26, 2024
#24
LoveGrowingIt said:
Removing excessive heat is probably the best reason to exhaust air. I doubt there's much impact regarding gases. The main gases are oxygen and carbon dioxide that are exchanged through transpiration and respiration. Both are expelled by and used by the plants. As for moisture, if the humidity is in the desired range (and there are circulation fans in the tent), I don't foresee a moisture problem.

I just think exhaust, which is better thought of as air exchange, tends to be overemphasized. If the air in the tent is replaced several times a minute, why even bother having a heater or a humidifier in the tent? At that point, we should be talking about the lung room environment, which tent controllers don't directly control. So, aside from controlling excessive heat, my thinking is that the key factor for a tent environment is maintaining a relatively low rate of air exchange. I don't know what that rate should be, but I suspect it depends on the size and life stage of the plants in the tent. I doubt replacing the air several times a minute is necessary.

Every situation is different, though, which makes it impossible for me to say precisely what's best for someone else. My largest tent only has 48 cubic feet of air without adjusting for the space taken up by the things in the tent. Even a 4" fan can pump a lot more than 48 CFM.
Click to expand...
True but the controllers are to pinpoint the tent environment. Supplementing the lung room to help keep the tent in range is a great way to do it.

As far as fresh air exchanges, while heat and moisture get moved, fresh CO² is another thing that constant air exchanges help with.
 
Reactions: lizto
Quote Reply
Page 2 of 2 · Replies 21–24 of 24
Prev
  • 1
  • 2
First Prev 2 of 2

Thread info

Replies 23
Views 8,140
Started Dec 19, 2024
Latest post Dec 26, 2024
Starter lizto
Forum General Indoor Growing

Latest posts

  • Blazing heat, smoke-filled skies, illegal! What could possibly go wrong?
    • Latest: Itscheese94
    • 2 minutes ago
    General Outdoor Growing
  • Grayoldnprouds chant of the ever circling Skeletal Family.
    • Latest: Oldchucky
    • 8 minutes ago
    Grow Diaries
  • S
    Whats going on with my plant
    • Latest: Spartan12
    • 16 minutes ago
    General Indoor Growing
  • 2026 Outdoor Grows! let's see em!
    • Latest: grayoldnproud
    • 40 minutes ago
    General Outdoor Growing
  • itscheese`s cheese thread
    • Latest: Itscheese94
    • 44 minutes ago
    Introduce Yourself
  • Home
  • Forums
  • Medical Cannabis Cultivation
  • General Indoor Growing
  • ACI infinity help with setup vpd
  • Contact us
  • Terms and rules
  • Privacy policy
  • Help
  • Home
Community platform by XenForo® © 2010-2026 XenForo Ltd.
Menu
Log in

Sign up

  • Home
  • News
  • Classifieds
  • Forums
    • What's new Featured content New posts New Articles New articles New products Latest activity
  • Social
  • Strains
  • Live
  • Learn
  • Brands
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?