Heat issues in a tent

N

Nodgman

Active Member
So I have a 4'x4'x7' tent with a 600w Mh light, I have my tent in a upstairs bedroom. The temperature is around 78 degrees in the room, but with the tent zipped up(and the light at 100%) it can get close to 100 degrees. I'm running a 4" exhaust fan exhausting it up into a attic, which doesn't seen to help a whole lot. initially I ordered a 6" fan but after a week they told me they "couldn't find it" so I canceled and went with a four.

Now it is very warm where I live, we have been having 100+ temps for awhile, but like I said the room is at 78.

By the way the 100 degree temp in the tent is directly under the light, which is about 18"-20" off the plants.
Any suggestions? Thanks in advance
 
K

Kmfks

Member
You need more ventilation and that may not even help because your temps outside the tent are too high. An air cooled hood would definitely help but idk about solve the problem.

I personally have my tent in a room where the temp is 76. the temp inside the tent would get over 100 with duct booster connected to my air cooled hood as exhaust. so I transformed a vent from my home ac to go directly into my tent using ducting. This allows me to not have to have to cool the entire house down.

so..try in this order
1 running lights at night
2 air cooled hood
3a/c source / get cooler air for intake
4 better exhaust fan
 
wantbud82

wantbud82

Member
I leave the bottom of the tent unzipped a little while lights on to help draw in cool air. I had a 4 inch and they ain't great I had to upgrade to 6inch.
 
J

jayboss1

Well-Known Member
that temp of 78 sounds not bad ,if you can keep it zipped down partly do that , try get it around 80ish that's better ,I also have had temps at 100f with the warm temps this summer in the uk .? but the plants seem to tolerate the heat .

I would watch the plants don't scorch ,I once had to put a few big-bud plants in a small tent ,the plants was pretty tall ones .not far off the light ,like you say ,the fuckers near burnt ,they got scorched pretty bad ,I lost some bud .
 
wantbud82

wantbud82

Member
jayboss1 said:
that temp of 78 sounds not bad ,if you can keep it zipped down partly do that , try get it around 80ish that's better ,I also have had temps at 100f with the warm temps this summer in the uk .? but the plants seem to tolerate the heat .

I would watch the plants don't scorch ,I once had to put a few big-bud plants in a small tent ,the plants was pretty tall ones .not far off the light ,like you say ,the fuckers near burnt ,they got scorched pretty bad ,I lost some bud .
Click to expand...
I had this problem once so I supercropped the main head,it was 4 weeks into flower but it was that or burn bud. There was no ill effect infact that bent main stem seemed to be a bigger bud than others
 
N

Nodgman

Active Member
Kmfks said:
You need more ventilation and that may not even help because your temps outside the tent are too high. An air cooled hood would definitely help but idk about solve the problem.

I personally have my tent in a room where the temp is 76. the temp inside the tent would get over 100 with duct booster connected to my air cooled hood as exhaust. so I transformed a vent from my home ac to go directly into my tent using ducting. This allows me to not have to have to cool the entire house down.

so..try in this order
1 running lights at night
2 air cooled hood
3a/c source / get cooler air for intake
4 better exhaust fan
Click to expand...
Hey thanks for the reply Ive been leaving the tent unzipped since I'm still in early veg and running the light 24/7. Although I'm looking to start turning it off for a few hours a night to conserve power.
 
N

Nodgman

Active Member
Kmfks said:
You need more ventilation and that may not even help because your temps outside the tent are too high. An air cooled hood would definitely help but idk about solve the problem.

I personally have my tent in a room where the temp is 76. the temp inside the tent would get over 100 with duct booster connected to my air cooled hood as exhaust. so I transformed a vent from my home ac to go directly into my tent using ducting. This allows me to not have to have to cool the entire house down.

so..try in this order
1 running lights at night
2 air cooled hood
3a/c source / get cooler air for intake
4 better exhaust fan
Click to expand...
Hey thanks for the reply Ive been leaving the tent unzipped since I'm still in early veg and running the light 24/7. Although I'm looking to start turning it off for a few hours a night to conserve power.
 
N

Nodgman

Active Member
Thanks for the replies everyone. I should've purchased an air cooled hood when I purchased the dumb light lol, how well do they work?
 
N

Nodgman

Active Member
jayboss1 said:
18/6 is good for veg ,that's what I use ,3 weeks on veg /then flip to 12/12
Click to expand...
Thanks you for the reply jay. I was doing 24/0 to help the seedlings gain some size, but I now realize that did more harm than good because of my heat issues. Ill have to do mine a bit longer than 3 weeks in veg because.... Wait you mean 3 months right?
 
J

jayboss1

Well-Known Member
I clone my plants . when they have good roots from thee heated propagator ,I transfer to solo cup size pots with coco soil / take them out the propagator leave under my florescence lights for a week or so till they get strong with more leafs /stems ,then after that I transplant to 11ltr pots with also coco soil and put them under my 600w light .on 18/6 for 3 weeks ,no longer than 4 anyway ? why in veg I top the plants /and start them on LST ,
 
LoRd MeGaTR0N31

LoRd MeGaTR0N31

Well-Known Member
I had the same problem. I have a 4x4x6.5 tent and before I got my air cool hood temps would hit high 90s with my 600w HPS running at 50% with tent closed with room temp being at 75 degrees. Once I purchased air cool hood temps now run between 75-80 with hps running at 100%. I have 6" carbon filter fan combo sucking hot air out. Carbonfilter-fan-ducting-hood. I keep the ballast and carbon filter outside of tent.
 
MidwesternGro

MidwesternGro

Well-Known Member
Run lights at night and pipe in air directly from the outside in a stealthy manner (Gut an AC and modify to run 6 inch ducting from it to your tent). Get at least a 400 cfm 6 inch inline fan. Heat rises so make sure your exhaust is near the top. As stated before, place ballast outside of tent. Open windows on different sides of the room so that you can get a nice breeze running through the room, and make sure your carbon filter can scrub as much cubic feet of air as your inline fan can move.
 
N

Nodgman

Active Member
jayboss1 said:
I clone my plants . when they have good roots from thee heated propagator ,I transfer to solo cup size pots with coco soil / take them out the propagator leave under my florescence lights for a week or so till they get strong with more leafs /stems ,then after that I transplant to 11ltr pots with also coco soil and put them under my 600w light .on 18/6 for 3 weeks ,no longer than 4 anyway ? why in veg I top the plants /and start them on LST ,
Click to expand...
oh okay so your talking about clones all mine were seed started( which seems like its taken forever).
 
RastaLove91

RastaLove91

Well-Known Member
Im having the same problem except I have an air cooled 600w but the room temp is already like 85 my ballast is adjustable amd at 300w temps are reaching 90 in the tent but you guys are givimg good advice
 
N

Nodgman

Active Member
RastaLove91 said:
Im having the same problem except I have an air cooled 600w but the room temp is already like 85 my ballast is adjustable amd at 300w temps are reaching 90 in the tent but you guys are givimg good advice
Click to expand...
^^ sounds like you need an ac unit^^



Anyhow i bought a air cooled hood off amazon for like 70$ and now my heat issues are gone.... thanks for the replies everyone!
 
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