Heat issues; >83 inside grow tent

ChrispyCritter

Well-Known Member
I quickly skimmed the responses and they are all great suggestions. I have fought heat in my grows forever and these basic moves will help for sure. I'm pretty sure all have been mentioned here: move your drivers out of your tent. Spider Farmer can sell you the plug n play cords I'm sure; too many fans in your tent. They all add surprising amounts of heat; and lights on at night. Your house will be cooler then. Bottom line is your temps are already fine. LED doesn't heat the leaf as much as hid so transpiration is less. You'll be fine up to 86-87. If you cool your entire room your tent will cool also but you should be good as long as your humidity is kept 50+ but I know that's tough in the desert. Good luck!
 
I quickly skimmed the responses and they are all great suggestions. I have fought heat in my grows forever and these basic moves will help for sure. I'm pretty sure all have been mentioned here: move your drivers out of your tent. Spider Farmer can sell you the plug n play cords I'm sure; too many fans in your tent. They all add surprising amounts of heat; and lights on at night. Your house will be cooler then. Bottom line is your temps are already fine. LED doesn't heat the leaf as much as hid so transpiration is less. You'll be fine up to 86-87. If you cool your entire room your tent will cool also but you should be good as long as your humidity is kept 50+ but I know that's tough in the desert. Good luck!
i agree, but he is still gonna have issues with foxtailing and will never harvest any purple in his buds...
 
This is why I love growing in a basement. I too recycle the air and if you get the air flow right humidity usually isn't an issue. CO2 isn't either since it is in a often used living space. I have the filter directly attached to the fan and the fan is just pointed at the port. The tent door stays partially open so the fan keeps air moving great inside and brings air in from the room.
 

Alfadog#1

Well-Known Member
I'm confused why you think you need to lower temps ........ ambient room temp is perfect your canopy temp is what matters around 86 because your growing with leds the lack of infrared you need that temp unlock hps which have a decent amount so don't do nothing unless plants look stressed unless you wanna lower your lights for greater PPFD and that causes u to drop ambient temp so your canopy won't surpass 86 then I understand but don't fixnit if it ain't broken
 

jondamon

Well-Known Member
I don't exhaust outside, i recycle the air in the room and i control the temps with my inverter AC unit, and using a dehumidifier to remove moisture. Occasionally opening the windows, few times a day. I spend time in the grow room so i don't need additional CO2.
I just placed the exhaust fan straight into the vent hole in the tent, attached the carbon filter and that's it, no ducting. Maybe i would add a short piece of ducting just to go easier through the vent hole, but currently it's without.

I have the Migro Aray light and it runs extremely cool. Even after hours of working, the light is only warm at the touch, not hot.
Ambient temp of the lung room is 25c, temps inside the tent is 27-28c. The light is on max wattage, the exhaust fan is on lowest speed,

In comparison, my previous Mars Hydro TSL2000 would heat up my tent from 20c to 30c just in 10 minutes, even with the exhaust fan on medium speed and the drivers outside the tent. And the light was extremely hot on touch, like a toaster. It smelled like burning electronics on max wattage.

From then on i stay away from those lights, so far the Migro Aray is the coolest running light in my experience, although i haven't tried many.
So let me see if I understand this correctly.

You’re running your AC to help control the temps in the room with the tent in it.

you’re running a dehumidifier to control moisturise because you’re recirculating your air.

So you’re utilising wattage via the AC at a cost to you and you’re dehumidifying the area at a cost of wattage.

when in real terms if you extracted the air (even using ducting to blow the eXhaust out of the room with the tent in it) this would stop you needing to run the AC as much as you wouldn’t be recirculating the already warm air and the humidity wouldn’t increase either because you’d be removing it out of the area saving you wattage on both the AC and the Dehuey.

to me it sounds like a no brainer exhaust the tent out of the room?? Or am I missing something?
 

Astral22

Well-Known Member
So let me see if I understand this correctly.

You’re running your AC to help control the temps in the room with the tent in it.

you’re running a dehumidifier to control moisturise because you’re recirculating your air.

So you’re utilising wattage via the AC at a cost to you and you’re dehumidifying the area at a cost of wattage.

when in real terms if you extracted the air (even using ducting to blow the eXhaust out of the room with the tent in it) this would stop you needing to run the AC as much as you wouldn’t be recirculating the already warm air and the humidity wouldn’t increase either because you’d be removing it out of the area saving you wattage on both the AC and the Dehuey.

to me it sounds like a no brainer exhaust the tent out of the room?? Or am I missing something?
I can't exhaust out of the room. I mean i could drill a large hole in a wall but i don't want to do that.
The tent is in a room that is split into 2 open parts, one side is my bedroom and the other side is my working area/office/gaming room. I spend a lot of time here so the AC is always running regardless whether i'm growing or not. Even when i'm not at home the AC is running and keeping the temperature optimal. In winter (and even now still) i'm heating my room to 24-25C, and in the summer i cool my room as well.

The AC is inverter style so it's very efficient, once it reaches the desired temperature it slows down and keeps the temps stable using low wattage.
It's a decently sized room so it would take some time for my light to heat up the room significantly, so the AC doesn't have to run too powerful to cool it.
And it's a small light for now, the Migro Aray 2 with 130watts, it runs extremely cool. It heats up my tent only 3C with the fan on minimal speed, from 25C to 28C. The fixture and driver are only warm at the touch, never hot.

The dehumidifier i don't use all the time, because when i'm heating the room the humidity is 40%. When cooling, the AC also dehumidifies the air by some percentage. And even when i do use the dehumidifer, it doesn't run all the time. It automatically turns on/off only based on set humidity. And it has a large capacity, 24l/24h so it dehumidifies quickly and doesn't need to run all day. It uses 400w.

If i drilled a hole in my room, all the heat that i'm using to keep myself comfortable would go out through the tent and the exhaust. So my AC unit would have to run harder and more often to keep the room at a warm temperature.
Besides, i don't grow all the time and i don't want to bother with drilling holes in the wall, moisture, cold air, heat escaping, bugs, wind noise etc.
The only free wall that could have a hole is facing the ocean, and i don't want to risk it because of bad weathers.
Also i want to keep it stealthy, i don't want anyone seeing the vent hole and hearing the fans, and i don't want smells escaping. If my carbon filter wears out it can be too late until i find out.

Actually i'm thinking if i upgrade to a 300w light in the future, i might even use less heating in the room and let the light warm up the room to keep me comfortable.

And one more thing, i used to have a marble stone heater, i don't know if that's how you call it in English. A stone panel with a metal grid inside, runs on electricity to heat the room. Anyway, it takes a lot of wattage and i was paying a lot of electricity monthly, but now with the AC unit it's at least 30% cheaper, so for me it's better either way.

If i had another room to grow then i would drill a hole yes, but then i would still have to heat up the room, or use HPS, or less efficient LED like Mars or Spider to heat up the tent.

Right now with my setup i'm perfectly happy and it works, for me this is a no brainer. Of course i wouldn't do this for a big grow, only for a small grow. If smell wasn't an issue, i would actually grow without a tent and just use a high wattage light to heat up the whole room and grow many plants :)

P.S Between May and late June i don't have to either heat nor cool the room, temps are just perfect.
Neither between September and November.
 
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jondamon

Well-Known Member
I can't exhaust out of the room. I mean i could drill a large hole in a wall but i don't want to do that.
The tent is in a room that is split into 2 open parts, one side is my bedroom and the other side is my working area/office/gaming room. I spend a lot of time here so the AC is always running regardless whether i'm growing or not. Even when i'm not at home the AC is running and keeping the temperature optimal. In winter (and even now still) i'm heating my room to 24-25C, and in the summer i cool my room as well.

The AC is inverter style so it's very efficient, once it reaches the desired temperature it slows down and keeps the temps stable using low wattage.
It's a decently sized room so it would take some time for my light to heat up the room significantly, so the AC doesn't have to run too powerful to cool it.
And it's a small light for now, the Migro Aray 2 with 130watts, it runs extremely cool. It heats up my tent only 3C with the fan on minimal speed, from 25C to 28C. The fixture and driver are only warm at the touch, never hot.

The dehumidifier i don't use all the time, because when i'm heating the room the humidity is 40%. When cooling, the AC also dehumidifies the air by some percentage. And even when i do use the dehumidifer, it doesn't run all the time. It automatically turns on/off only based on set humidity. And it has a large capacity, 24l/24h so it dehumidifies quickly and doesn't need to run all day. It uses 400w.

If i drilled a hole in my room, all the heat that i'm using to keep myself comfortable would go out through the tent and the exhaust. So my AC unit would have to run harder and more often to keep the room at a warm temperature.
Besides, i don't grow all the time and i don't want to bother with drilling holes in the wall, moisture, cold air, heat escaping, bugs, wind noise etc.
The only free wall that could have a hole is facing the ocean, and i don't want to risk it because of bad weathers.
Also i want to keep it stealthy, i don't want anyone seeing the vent hole and hearing the fans, and i don't want smells escaping. If my carbon filter wears out it can be too late until i find out.

Actually i'm thinking if i upgrade to a 300w light in the future, i might even use less heating in the room and let the light warm up the room to keep me comfortable.

And one more thing, i used to have a marble stone heater, i don't know if that's how you call it in English. A stone panel with a metal grid inside, runs on electricity to heat the room. Anyway, it takes a lot of wattage and i was paying a lot of electricity monthly, but now with the AC unit it's at least 30% cheaper, so for me it's better either way.

If i had another room to grow then i would drill a hole yes, but then i would still have to heat up the room, or use HPS, or less efficient LED like Mars or Spider to heat up the tent.

Right now with my setup i'm perfectly happy and it works, for me this is a no brainer. Of course i wouldn't do this for a big grow, only for a small grow. If smell wasn't an issue, i would actually grow without a tent and just use a high wattage light to heat up the whole room and grow many plants :)

P.S Between May and late June i don't have to either heat nor cool the room, temps are just perfect.
Neither between September and November.
My bad I thought you were trying to deal with heat issues hence the title of your thread. But if you’re all sorted then no worries.
 

pahpah-cee

Well-Known Member
your temperature is actually ideal. Keep it under 85F and your plants will thrive. But with summer coming up I’d suggest to get ready to vent it outside or into the attic. Or run another AC inside the room … but again it would need to be vented outside or else it would be inefficient. Definitely try to pull those drivers outside the tent. Either buy a kit or get some wire and splice more wire in to extend it.

Fans don’t remove heat, they just circulate it and the more fans running the more heat their motors generate.

patching walls sucks but it’s not too difficult. Think of it as an opportunity to learn a new skill.
 
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