Over heating growroom

[SyDsHo]

Hello all. I'm having a hell of a time getting my daytime temp below 80. I thought it was fine for a week, then realized my probe wasnt working properly. Since getting my new probe, I had to add an eight in in line duct booster for my outside air intake. It was previously a passive intake. I was running so hot I added to see what kinda difference it would make. It shaved about 4-5 degrees. So currently, Its about 75 the first two hrs. Up to eighty for about five to six more hrs. Then crept up to 85 by the final 4-5 hrs. How harmful will 85 degree air be? Surely there is a simple way to fix the problem i am overlooking!? Maybe??? Not an option for a AC as I have no window in my partitioned off area. Thanks for any and all suggestions.!!!!!!!!!!

[SyDsHo]

Current air flow is as follows:

I have the previously mentioned 8 in duct booster pulling cold outside air into my setup.

I grow vertically hydroponically, utilizing a vertitube. My vertitubes hot air is being pulled out by a Vortex 6 in. fan through a closed loop.

I also have a 6 in. Vortex fan on my charcoal filter exhausting.

nighttime temp is steady 74. Higher than normal because of my day temp being so high. Compensating for temp change, preventing mold? At least thats my thinking. Its definitely cutting down on condensation buildup after daytime.

[HateHeaven]

I'm sure some strains are use to normally being in warm weather. If the plants are looking good then I bet you'll be fine :thumbsup:

[SFGurrilla]

You should invest in a Isolated A/C Unit you can just roll around the room.

[Rusty Trichome]

I live in the desert and grow in an outdoors shed. Summer temps get to 115f daily, with humidity at around 10%. Even with an a/c unit blowing directly across the tops, can only get daytime temps down to about 90.
Normally (spring and fall) I water with 1/2 gallon or so of water every two or three days, per 3 gallon pot.
During the summer, requires an increase to 1/2 gallon every day and raising the lights a couple of extra inches. As long as I keep them hydrated, have had no significant problems. Also, I only spray the middle and lower branches so as not to scortch the tops.
Been doing this sucessfully for a few years now.

[SyDsHo]

Isolated AC unit. I believe the easy answer I was overlooking. Never heard of them before. However, I dont have much extra space to work with. I have 44 plants in a 6X6X9 area. I have a little extra floor space this time. But how big are these units? Next time however, I'm planned on not having ne extra floor space. Adding another 10 - 12 plants on floor. Thanks Guerilla.

Rusty
You have then not had problems encountering the 90 degree mark regularly? This is comforting for me to hear. As I only usually hit 84-85 for a few hrs daily. I need to figure out a good strain that likes a little extra heat. Right now I'm growin AfPak and Banana x Skunk. They both seem to be thriving in the conditions. However just a heat loving strain isnt the only part, as I have many strain restrictions due to my growing method.

Thanks all

[SyDsHo]

I just remembered your "spraying only the lower nodes as to not scorch the top? What do u mean by this? Because it is cooler lower? And what are u spraying? I only spray my girls with Neem. Are you talking pest control spray also? Thanks. Again.

[HateHeaven]

I live in the desert and grow in an outdoors shed. Summer temps get to 115f daily, with humidity at around 10%. Even with an a/c unit blowing directly across the tops, can only get daytime temps down to about 90.
Normally (spring and fall) I water with 1/2 gallon or so of water every two or three days, per 3 gallon pot.
During the summer, requires an increase to 1/2 gallon every day and raising the lights a couple of extra inches. As long as I keep them hydrated, have had no significant problems. Also, I only spray the middle and lower branches so as not to scortch the tops.
Been doing this sucessfully for a few years now.


I was a little scared what I was going to do once it starts to get hotter, I live in Az as well.

[Rusty Trichome]

I just remembered your "spraying only the lower nodes as to not scorch the top? What do u mean by this? Because it is cooler lower? And what are u spraying? I only spray my girls with Neem. Are you talking pest control spray also? Thanks. Again.

Someone else will have to answer the neem oil question. Have never had pest issues, but wouldn't apply neem with lights on. Worst bugs I get here are the wasps, and the neighbors flies. (all of my neighbors have got horses)
Looking back at the post, I noticed I didn't mention that I veg indoors and flower outdoors. Fewer hours of heat in the shed helps. A few years ago I tried vegging outside too, and took me 4 months of frustration and failures to finally talk my wife (Amber) into at least starting the plants indoors.

Every little drop of water acts like a magnifying glass, and can burn, especially using HID's...plus there's the added worries about high humidity and heat causing mold.
The combination of desert heat, and using 400w HPS's, I avoid misting the tops with water and foliar applications, unless I raise the lights (or just swivel the lights out of the way, see picture below) till the water has been absorbed or evaporated. (10 minutes or so)

When I need to foliar, I go in about 15 minutes before lights-out, turn out all but 1 light, do the foliar thing, then as I'm leaving the room I turn out the last light. Turning lights off a couple of minutes early has never caused me problems.

I usually have no problems at all with lower humidity levels in flower, and strive to keep the levels lower. Also, I vent the room, even with the a/c on. But evaporation just from watering gives a little bump to the humidity anyways.
Flushing the pots is staggered over a couple of days, and is done first thing in the morning. If I flush 'em all at once, humidity skyrockets, like Houston during a heat wave.

Lastly, I use a sheet of 3/8" plexiglass under the lights as an added barrier to help keep the direct heat off the plants. (wiped clean of dust, daily)

(* pix below...The 2 x 4's are screwed-in to the 2 x 4 on the back wall (tall white) with only 1 screw, but they rest on top of the other 2 x 4 allowing me to swivel the lights to any position I need) Perhaps I can get a better pix later today, if anyone is interested.

HTH...Rusty