VPD Made Easy | Dial In Your VPD With AC Infinity Controller 69 Pro 

How do you guys manage your VPD?

In the past year, I have become an AC Infinity nut!🤣 I have three tents in my grow room, 4x4, 3x3, and a 2X4. All three tents have smart exhaust fans with the 69 controller. I don't use the VPD section of the controller. I have a window unit AC for the cooling, a dehumidifier And a brand new AC infinity humidifier, that big 15 liter one....... That thing is a beast! The window unit and humidifier controls the lung room environment And I use the fan speed setting to control the temperature in the tent. I ALWAYS have some air flow in my tent, so I have a minimum setting on my fan and then I have a trigger temperature set for the fan to go at a higher rate to bring the temperature back down. Each tent has different lights and different thermal loads, but all three tents have the same style of air flow. The 4x4 and 3x3 are both Gorilla tents and the 2X4 tent is a Mars hydro. On the Gorilla tents, I use the front lower cinched inlets with 6 inch exhaust hose with a screen covering to bring the air into the tent. Just enough of the hose sticks out for it to lay flat and long enough to prevent light intrusion. I used the exhaust hose from the AC infinity 6 inch exhaust fan in the 4x4 tent. It is reflectively lined on the inside, so I fogged the hose outside the tent with flat black paint to knock down the light intrusion even more. The 2X4 Mars tent only has cinched openings at the top, So I use a very long 4 inch Exhaust hose to bring in the fresh air. Comes all the way back down to the bottom of the tent and to the bottom of the floor outside the tent. This way all tents take cool air from the bottom of the lung room and all tents have air flow from bottom front to top rear and it exhausts out the very top. The ceiling fan is always going to keep the lung room air mixed well. This maintains the long room parameters very closely. The tents parameters are just as stable. The CLOUDFORGE T7 Is an absolute beast and is highly accurate! It handles my lung room quite easily at setting 2. The absolute only downside so far is not being able to control it with the phone app when used totally on its own. You can use it with the 69 pro controller, but that is really only for one tent, because it uses the sensor from the 69 controller that is in your tent. With my Grow room set up in this fashion with AC Infinity, my environment has been rock steady! It's been one less thing to worry about and having to constantly check and tweak. Today I will be finishing the installation of my AC Infinity controlled CO2 augmentation! I'll run the hose to one central location in the grow room and then equal length identical hoses with a manifold at the end to distribute the CO2 to each tent, I'll zip tie each manifold to the top bar at the front of each tent. With CO2 being heavier it will fall down to the bottom and being stirred up by the circulation fans, which are AC Infinity also! Each tent will get a supply of CO2 through the manifolds and through recirculation, I think it will be a glorious run! I really love everything that I've gotten so far through AC Infinity! And this smart controller can make your life so much easier!

Probably the best explanation of VPD/kPa and how to use the 69 Pro Controller out there. Much thx!🤙🍻💨

Single handedly bringing the mullet back

Hey man, Just want to say I own the AC infinity 69 Pro, and have the tent and equipment you talked about. It has been so overwhelming for me to understand how I should go about trying to control the VPD, and your video made everything so much easier. Great work, and thank you for making this. Cheers

AWSOME video very well described 🎉🎉🎉

Appreciate the Video too Man, learning this VPD stuff thnx again

I too am NE, glad I just bought ac infinity's humidifier, heater, and 8 port controller and can't wait. Thanks for explaining the settings, I've been doing the tail chasing with a standard oil filled heater and humidifier that I can't program and it drives me nuts.

Aaron is dropping knowledge here! Sick mullet 🤘🏽!

The hair is amazing, I'm jealous!

Nice!

I may have been over killing my ventilation and having steady high VPD. Now I have a VPD sensor on my new T-3 humidifier I now have my exhaust on low on off at 15 minutes intervals on a timer which saves power and keeps the humidity just about right so far based on leaf temp off set. Its all built into the humidifier. Had issues with leaf tip burn and stress. Going to keep it .9 as the lowest humidifier turns on and it goes down to .84 and shuts off until it gets to .9 and turns on. I need to change that I think. Although I have wide leaf strains that are supposed to like it dry. I will set trigger to 1.0 instead of .9 for late veg . Something I never tried. I always ran my dehumidifier when I probably should not have for the last 4 grows that did alright but could have done batter. I want to see the other extreme now. But now my living space humidity is a few points higher. I prefer it lower a few points.

Bro! Love the hair ❤

You have hair like a lion Son ! A great video and when understood, makes the path of growth of the plant on a faster track. thank you for sharing!

Great info👊. it's ok to run RO water in the humidifier,i just switched to a RO system the plants are loving it in auto pots an a RDWC system.But thanks for the info bro

Why is every chart different? Which one is more reliable to go with the 69 PRO?

Thanks for the video! Im trying to find out as a new grower, that is in a cold environment, would keeping the day/night temps the same hurt the plants?

I dry using VPD and aim for between .77 - 85 KPa by dialing in the humidity level to the ambient temp to create the VPD desired. and get a 7 day dry in summer or winter.

@HappyHydro you are right it's like chasing a tail. Wish I seen this a few months ago but I figured it out. My question is dialing in the vpd with my tent how do you get it to stay consistent meaning not having to go thru distilled water everyday or other day to fill the humidifier? Vpd is dialed in but have to use a gallon of water every second day for the humidifier.

So i do live in south west germany in summer it is very hot, environment temp in my room where the tent is is about 26-28Celsius... what u recommend? Thx,

@happyhydro it’s tough out here in Arizona … tents constantly going thru about a gallon per day to keep humidity level … we don’t use VPD triggers but are using humidity triggers with buffer and transitions using the AC Infinity 69 Pro. Exhaust triggers as well for too high temp and too high humidity it’s pretty stable but any ideas how to control the room better

nice video. is there a recommend vdp setting for harvest?

I haven't seen an AC unit for AC Infinity yet which is weird since they started out from ACs but i have a portable AC unit i havent ised yet but will get hot here shortly. How can i have that AC unit (Phillips) get controlled with the controller or can I?

Perfect timing on this as I’m trying to figure this out on my controller 69. I have the inline fan managing vpd, while the humidifier is aiming for a humidity range. I have a dumb heater and when it turns on it spikes the heat in my tent. Do you know a great heater to work with controller 69?

Any advice for someone pulling fresh air from outside?

What happens during a night cycle? does the AC Infinity controller know not to freak out due to light changes?

My question is ... for us growers who have $$$ in other growing equipment. Can we connect to this ac infinity pro 69+

What did you use to grow your hair?

So is everyone not using the leaf temp offset? On their ac infinity controller?

The Mullet brought me here!! 🙉

I dont run a dehumidifier, I increase airflow dramatically if its to humid. So far I have been lucky, its good enough. I do run the AC though when its needed.

I'm looking for a channel or a groop to discuss settings, I would like to smooth my VPD curve, it goes up and down 0.1 kpa every 30 minutes, would like to have it steady

Came for the info. Stayed for the mullet.

link to pulse chart please

Any links to data on vpd that is cannabis specific? It seems there are several versions of these “optimum vpd” ranges but they are generic and or specific to crops like tomatoes…tomatoes and cannabis hybrids were not developed or climatized to grow in the same environment…imo the needs of cannabis are much different than most vegetables and maybe even different depending where individual cultivars are climatized to..broad leaf and narrow leaf varieties def do not like the same environments…

Good explanation of VPD, but you figures are a bit high compared to other scientific studies i've seen. You must live in a warm climate, so even when you are on lower power light in veg, you are still able to create high temps. In Europe and other cooler winter climates. it quite hard to get over mid 70's in early veg renning LED's, But a VPD of 75 -90KPa is just fine. Anything over 1.0KPa in early flower works well and 140 is the figure most give for mid to late flower.

Sam Soil or Joe Dirt?

Bro...why are you holding a lav mic??? Clip it to your shirt collar, or even better get some Moleskin tape (walmart, cvs, amazon) and tape it to your chest. As a videographer i just couldn't handle that hahaha

You morphed into Joe Dirt! JK ✌🏼

This is way more complicated than this...he doesn't even consider the room where the tent is located...

Joe Dirt wannabee. Just sad bro.