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Heat problem in my 2.4m x 2.4m tent 4 600W cooltubes: need ideas

John Holmes

Member
Hello everybody, as the title says I've been working on setting up my new, BIG growing tent and I've encountered some problems.

This is the gear that I'm using:
Secret Jardin 240cmx240cmx200cm tent
4 600watts HPS dual spectrum with 125mm cooltubes
Can Fan ISO MAX 1480 m3/h 250mm (extract fan)
CAN-Lite carbon filter 1500m3/h 250mm
PrimaKlima Fan 800m3/h 160mm(Insert fan)

Yesterday I finally tried turning on the lights after setting everything up. And the heat felt like it was surely gonna be a problem. I connected ducting>extractfan> 4 cooltubes>carbon filter. The thing is that the cooltubes is like half the size as the Can fan ISO MAX 1480m3 im using, so i had to use reducers to make it work.
Anyway, the airflow felt REALLY weak so I decided that it's probably for the best to skip the ductings through the cooltubes and just go with the fan and the carbon filter ducted directly together. Is this a proper judgement? Or should i try to get larger cooltubes that fits with my 250mm carbon filter and fan?

I have an insertion fan too, that will give me cool, fresh air directly from the window. The tent currently has 2 holes for air, can I make another one for inserting air through the cool tubes and then out again? Like window>ducting>insertfan>ducting>cooltubes,ductings>out of window. to cool the lights down? Or will the heat be under controll with this setup?

Please let me know what you think and if you need any information or setup links of the items im using, just let me know! Sorry for my bad english, not main.
 

Curiousnoob

Well-Known Member
Hey mate, I have just set up a similar set up, I have a gorilla 5 x 9, 4 x 600w in 4 x 400mm cool tubes, max fan 200, can lite 1500 carbon filter 200mm silencer. I did have the filter-fan-silencer-splitter-cool tubes-venting out. Same issue to much heat after many discussions at the local hydro shop, the conclusion was it is way to much to put on the one 200 fan, the filter and fan need to be on a separate system to cool tubes, so I had to add another 200 fan just for the cooltubes. My setup now is filter-fan-silencer-200mm acoustic ducting- out of tent (onto roof of tent). Then from one side of the tent to the other, 200mmx2x150mm splitter- 150 duct-into cool tubes-150duct-cool tubes-150duct-200x2x150 splitter-200duct-200mm silenced phresh fan into 200 acoustic ducting (Venting out side if possible). This helped alot. I also have a 150mm max fan drawing fresh air from outside into the bottom of tent, out side the tent I have a portable air conditioner with one tent vent open on opposite side to where the carbon filter is pulling out from (so air draws for one side to the other). This may be a little hard to follow, will shoot some pics through soon.
 

John Holmes

Member
Hey mate, I have just set up a similar set up, I have a gorilla 5 x 9, 4 x 600w in 4 x 400mm cool tubes, max fan 200, can lite 1500 carbon filter 200mm silencer. I did have the filter-fan-silencer-splitter-cool tubes-venting out. Same issue to much heat after many discussions at the local hydro shop, the conclusion was it is way to much to put on the one 200 fan, the filter and fan need to be on a separate system to cool tubes, so I had to add another 200 fan just for the cooltubes. My setup now is filter-fan-silencer-200mm acoustic ducting- out of tent (onto roof of tent). Then from one side of the tent to the other, 200mmx2x150mm splitter- 150 duct-into cool tubes-150duct-cool tubes-150duct-200x2x150 splitter-200duct-200mm silenced phresh fan into 200 acoustic ducting (Venting out side if possible). This helped alot. I also have a 150mm max fan drawing fresh air from outside into the bottom of tent, out side the tent I have a portable air conditioner with one tent vent open on opposite side to where the carbon filter is pulling out from (so air draws for one side to the other). This may be a little hard to follow, will shoot some pics through soon.
Hey man, thanks for the reply!

Alright, so I already have the extract fan set up to the carbonfilter to the duct that goes on the roof of the tent. I also have the insertion fan that will draw fresh air in through the bottom of the tent. Will I need to get bigger cooltubes? 200mm large i guess so it will fit with the new fan. So what I would need is to get another 200mm fan that inserts air through the cooltubes and then straight out again, put more holes in the tent, both for the new fan and just some passive airintakes?

Yes, please send some pictures! if possible, do you have like a very basic drawing that would explain how the new fan would operate through the cooltubes and such, and where the new passive air intakes would be?

Thanks alot man, this project feels alot safer now!
 

Curiousnoob

Well-Known Member
Haha, I feel your pain growmie!

Ok this is the 150mm drawing fresh air from outside into tent, if it rains out side I turn fan off and open tent vents (keeping negative pressure)
20200715_004211.jpg
20200715_004226.jpg

I have a (outside)200mm down to 150mm to help with the whooshing noise outside.

Ok, Now this open duct is for cool tubes
15947379196786585308713212589533.jpg

Outside in
15947380100261584882897718155031.jpg

15947380685675534168187698447376.jpg
15947381686408358279557470777559.jpg
1594738211126143864208387983218.jpg

Ok bit hard atm lights on... So from top to bottom is left side to right side of tent, last picture is the silenced 200mm fan drawing/pulling air over cool tubes from the open duct.

Filter set up
15947384152884380104460972990203.jpg

Now as you see here my filter, fan, silencer are on a separate line.
15947385508623063416671258019006.jpg
15947385852237717886575123192816.jpg

Ducting just sits open on top of tent.
 

John Holmes

Member
Man thank you soooo much!!! You just made this alooot less stressful! Can't thank you enough!

I'm going over there right now. I'll post some pictures to show how my thoughts go and you can let me know what you think?
 
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Curiousnoob

Well-Known Member
Mate you are very welcome! I'm glad I could help as I know exactly how you are feeling being through exactly what you have! If you can minimise the the slack in the ducting it will help your fans live longer/work more efficiently, something I need to do. Let me know how you go.
 

John Holmes

Member
Alright, heres some pics!

I have 125mm cooltubes, that shouldnt be too much of a difference from 150mm, right?
I guess i Will make the holes for the cooltube ducting on the roof of the tent then?
 

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John Holmes

Member
I also have the insert air fan that the picture shows, that Will Bring cold air from outside to the tent, Should i add another open vent air hole with my AC next to?

also, How Strong is your silenced fan that goes through the cooltubes?

Can i Keep my silenced200 cooltube-connected fan on the inside of the tent? It would be alot less turning for the ductings and stuff.
 
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Curiousnoob

Well-Known Member
Hey mate, Looking good! I'm sure the 125mm cool tubes will be just fine do you jave reflectors for them to direct light donwards?

Hmmm, not sure about where to put your holes that one is on you mate, sorry. I already had holes... 2 x 300mm holes on either side and 2 x 300mm on roof.

It's is hyper phresh 200 silenced, with adjustable speed controller
Screenshot_20200715-114756_Chrome.jpg

You could keep on inside.. but I don't think one or two turns will affect flow too much. I try to keep as little in the tent as possible as each electrical source is an added source of heat aswell.

With the vent, I use depending on the weather. if it's raining I will open vent up and slow down 150mm fan, so I don't get to much hummidity during flower And tue same when it's hot so it uses the portable ac air. Obviously the fresher the air the better. You can use both I do most times, as long as I have a slight negative air pressure in my room.
 

John Holmes

Member
Hey mate, Looking good! I'm sure the 125mm cool tubes will be just fine do you jave reflectors for them to direct light donwards?

Hmmm, not sure about where to put your holes that one is on you mate, sorry. I already had holes... 2 x 300mm holes on either side and 2 x 300mm on roof.

It's is hyper phresh 200 silenced, with adjustable speed controller
Screenshot_20200715-114756_Chrome.jpg

You could keep on inside.. but I don't think one or two turns will affect flow too much. I try to keep as little in the tent as possible as each electrical source is an added source of heat aswell.

With the vent, I use depending on the weather. if it's raining I will open vent up and slow down 150mm fan, so I don't get to much hummidity during flower And tue same when it's hot so it uses the portable ac air. Obviously the fresher the air the better. You can use both I do most times, as long as I have a slight negative air pressure in my room.
Hey man!
Sounds great!

Btw, How many plants would you recommend planting in that size of a tent? Ive been thinking about 16, 4 in each squarefeet. Not sure How big the tent is in inches Lol, its 4 times bigger than my 4x4 tent Anyways.

Oh and do you have any less painful way to deal with the runoff? Im thinking that 16 plants Will make it too tight to be able to take care of the runoff everyday..

Im using coco perlite mix with GHE base nutrients and some cal+mag added. Do you recommend adding some sort of nutrient that Helps with heat maybe? Just incase.

Thanks again man
 
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