Since you are running CO2, then your only real option (for a closed co2 system) is to put more AC but pipe it in from outside the wall. If you move all your heat generating equipment (except lights) outside the room and have it draw the hot air into the A/C then get piped back in. The A/C is gonna get hot, so make sure it has enough BTUs to handle it. If you have big enough fans on the A/C, then it can make a cross breeze and possibly eliminate some fans and excess electricity. If you have enough room on the other side of the wall, I would do a waterfall cooler and route air through that before the A/C.
Sorry man. I think the issue here is your system is just not near big enough to handle the load. Call an HVAC dude and have him calculate what you really need. They have pre-written formulas for that kind of stuff.
If you add one or two portable A/C units inside the room and pipe the waste heat out, that might be just what you need to lower humidity and manage the temp better.
If you have a crawl space or attic above the room, it needs to be vented. We had a camper trailer in the sun and it was always very hot. We built a shade over it and one tiny A/C was enough to keep it nice and cool inside. The reason it works like that is the level of airflow. The more air that passes between the roof and the inside, the less heat transferred. We built only the top. It had no sides to slow airflow.
Most likely, building a shade over the building is out of the question, but you might be able to vent the roof enough to make a difference.
You know, if you are going to make changes to the roof, Might I suggest roof vent fans connected to a small generator motor. Each roof vent will produce a few low amp volts, but it will take off the electric bill. PV panels where the vents are not.
Something like this on the roof connected to a motor? I suppose I would also need some batteries to store the electricity and some kind of inverter ? It is a good idea mate as here the electricity is deadly expensive…
I suggest this because you have a large grow. You need every cost reduction you can get. Plus, being able to generate some of your own electricity means you will last much longer in case the power goes out.
Do you have any destratification fans in the room? They are useful in mixing the hot, humid air that rides to the ceiling with the cool, dry air that likes to stay near the floor, helping to keep the entire volume of air in the room uniform in temperature and humidity.
What kind of ventilation/fresh air supply do you have feeding the lower level of plants? Most vertical growing systems are now using hot-air extraction vents placed between the lights and the layer of racking that supports the plants above it. Hot air from the LEDs is siphoned off and conditioned ASAP, and cool air is fed in from below the plants to help pull humidity up and through the plant canopy.
If you do go for the option of ventilation is your outdoor air dry enough to bring your growing temp and humidity into checking?
Also, have you considered following VPD to make the best of your room’s natural state? It can feel counterintuitive, but raising the temperature when humidity spikes can make the plants “feel” like they’re not in as humid of an environment.
On the top layer I have some kind of fans that blow the air from the top. I will try to make some pictures.
On the bottom classic fans on feet to flow the air and small clips to make the branches move.
The system is on a -almost- close circuit system, so basicly the people that build this tried to bring as little as possible air from outside -contamination-.
Today I tried to cut the intraction/extraction as it was rainy.
I added 6 dehumidifiers but I didnt notice a big difference (from 2 to 3%)
I then restarted the int/ext and start playing with temps. Tried to move from 26 to 30 but the humidity started to rise a lot… I stopped at 85% as I didnt want to wipe the walls…
Then I dropped the temp from 26 to 18 and the humidity went to 56. The problem is I can’t schedule the AC so I raised again to 26 and tomorrow I will try to put cold air from the morning.
Dear company that made this indoor for where I work (I wont mention them as its a pretty big company in the us) if you read this please stop working in this industry.
Thank you for your answer, help and time guys… it’s great to have that nice community
