Tent is way too hot

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VegasWinner

Well-Known Member
place the muffler closer to the fan and place the long duct after the muffler and your pressuure goes down on the exhaust side. passive intakes are fine. Is your tent sucked in or not. If your tent has not sucked in your fan is not pulling hard enough. When you get negative pressure, your temps will be under control. make sure your exhaust is above your lights and place the filter with the shortest duct as possible between the fan and the duct. Additional fans should not be needed for cooling if you have the exhaust dialed in. Fans are for circulation only not cooling. use a pc fan up where your light is to move air around and increase your inline fan and you should be fine. if you get a fan with speed controller you juts dial it up until you get the flow rate you want. That should solve your problems You need more flow due to the heat being exhausted by the light unit. peace
 
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VegasWinner

Well-Known Member
Can you pull cold air from outside directly into the tent with a duct? That would solve the problem quickly. Since you are ducting to a different room you are not recycling hot air. leaving the tent opens heats up the room. Increase air flow rates and that is best. if you can lower the temp of the incoming air that works too. Pull air from the basement if it that cold and let that flow directly into the ten via a passive duct. Place the duct in an inlet at the bottom of then tent to bring that cold air in. How to you get rid of the hot air in the basement, natural or mechanical methods? peace
 
M

MadButcher

Well-Known Member
Bunduki said:
http://www.bestseedbank.com/calculating-fan-requirements-indoor-garden/

This is the most in-depth fan calculation I've seen, allows for practically everything including calculating how much extra you need to reduce the growroom temp depending on the inlet air temp, might help ya
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According to this I should be ok'ish. Found out tho, my carbon filter is only rated for 150 cfm, which is rather silly when the fan does 170. So I'm loosing there already. Also, removed the muffler since it made no difference.

I think I never mentioned that the temps above the light never changed an it's actually hotter on the floor and will creep up very slow over hours. Above the light I get, no matter what, 86 degrees.
The air coming out of the light isn't all that warm either. But the light rays ?Holy fuck, pretty warm.

On the upside, I found a way to vent it outside via my bathroom fan plumbing which I can access via ceiling tiles.
Also, I do have a smaller light which I will try in the 4x4. That's the cheapest option right now rather than buying all newfan and filter. Or I use the big light in the small 2.5x2.5x5 tent. If my 4" rig ain't big enough for that,than its really good for nothing.
Also, I place my oscillating fan right by the passive vent and opened it all the way.
And now I wait...
 
cindysid

cindysid

Well-Known Member
I just started growing indoors the first of this year, and I feel your pain about purchasing the wrong equipment! I bought a lot of things that I didn't need or couldn't use. The good news is that it sounds like you have what you need to make a decent crop, and when that happens you'll feel better. You'll know what improvements need to be made and the money you save by growing your own should make up for your previous mistakes as well as provide you with funds for upgrades. I started with one 4x4 tent, and now I'm on my third indoor cycle. Hubby just built me a 9x9 grow room...and yes I'm still tweeking my system and expect to continue to do so. There is always room for improvement.
 
M

MadButcher

Well-Known Member
cindysid said:
I just started growing indoors the first of this year, and I feel your pain about purchasing the wrong equipment! I bought a lot of things that I didn't need or couldn't use. The good news is that it sounds like you have what you need to make a decent crop, and when that happens you'll feel better. You'll know what improvements need to be made and the money you save by growing your own should make up for your previous mistakes as well as provide you with funds for upgrades. I started with one 4x4 tent, and now I'm on my third indoor cycle. Hubby just built me a 9x9 grow room...and yes I'm still tweeking my system and expect to continue to do so. There is always room for improvement.
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Absolutely!
And there's so much info, some contradicting lots not. But you can already see in this little thread how there are tons of opinions on how to go about it, and I appreciate them all.
In the end, I'll take what I can get and start. And whatever I get, I get and its grown by me.
 
Bunduki

Bunduki

Active Member
I've actually just got around to converting the temps we're talking about into Celsius, that plus what you said about the floor...see, once your plants are in, your floor isn't going to get much light to heat it up (also, what colour is your floor? reflective or white would be best) and honestly your temps are not that bad. I've been in a similar situation with my tent, my grow was kinda spontaneous, friend offered me 2 spare seedlings and I just bought some stuff and went at it. Killed one of them with nutrient burn straight off lol, but the survivor is 3 weeks from finishing.

Canopy level has been around 30-35celcius most of the time, that's 86-95 degrees. Not bothered coming up with anything because in a few weeks it'll be bloody freezing so I bought a heater instead!
I've managed to make most of the newbie mistakes, but every time something went wrong I popped on here :P

Cannabis is a pretty forgiving plant, these pics are about a week old (lights off now) so 4 weeks to go. Totally outclassed by most of the grows on here but it's my first and I'm happy! DSC_0043.JPG DSC_0042.JPG
 
cindysid

cindysid

Well-Known Member
Bunduki said:
I've actually just got around to converting the temps we're talking about into Celsius, that plus what you said about the floor...see, once your plants are in, your floor isn't going to get much light to heat it up (also, what colour is your floor? reflective or white would be best) and honestly your temps are not that bad. I've been in a similar situation with my tent, my grow was kinda spontaneous, friend offered me 2 spare seedlings and I just bought some stuff and went at it. Killed one of them with nutrient burn straight off lol, but the survivor is 3 weeks from finishing.

Canopy level has been around 30-35celcius most of the time, that's 86-95 degrees. Not bothered coming up with anything because in a few weeks it'll be bloody freezing so I bought a heater instead!
I've managed to make most of the newbie mistakes, but every time something went wrong I popped on here :P

Cannabis is a pretty forgiving plant, these pics are about a week old (lights off now) so 4 weeks to go. Totally outclassed by most of the grows on here but it's my first and I'm happy! View attachment 3780167 View attachment 3780168
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Looks great for a first grow! In a few weeks you will really be happy!
 
PSUAGRO.

PSUAGRO.

Well-Known Member
you need a bigger exhaust, the one you have isn't cutting........sorry

look at hyperfan 6inch, can always dim it down with the included dial........best cfm/w in the industry


good luck
 
M

MadButcher

Well-Known Member
Sorry, I've been tied up to keep working on this but I'll try a few suggestions made, for sure.
But riddle me this :
The temperature below the lamp is hotter than above. And I don't mean right below it but 3 feet away. And it's not instant heat but creeps up slow over hours. You think the hot air would rise up... But, and my English isn't good enough to explain it, the light rays themselves are hot. Or cause things to heat.

Like I said, nothing I've done so far, changed the temperature above it. Also, operating temperature of the light is 85-105. With 86 right on top of the lamp, I can't really say it's running hot or exhausts hot either. But the light radiates heat from/with the actual rays.
 
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Morriston55

Morriston55

Well-Known Member
Its not "youd think" the hot air would rise up to the top of the tent, it does, thats just a fact.

I would presume your meter as stated is warming up being in the direct light versus when you are taking the top of the tent pics the temp lowers because its not heatsoaking the casing of the thermometer.

Place the temp gauge under shade at canopy level, since you dont have plants, make shade, put a simple piece of cardstock or envelope or anything above it to stop it form getting direct light
 
M

MadButcher

Well-Known Member
Morriston55 said:
Its not "youd think" the hot air would rise up to the top of the tent, it does, thats just a fact.

I would presume your meter as stated is warming up being in the direct light versus when you are taking the top of the tent pics the temp lowers because its not heatsoaking the casing of the thermometer.

Place the temp gauge under shade at canopy level, since you dont have plants, make shade, put a simple piece of cardstock or envelope or anything above it to stop it form getting direct light
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I've done that, got too hot. But I got it venting out now (just finished that) and that should keep the house cooler. Now I can actually pull cooler air from the basement into the tent which I was previously venting to and in turned heated the house.
Now I'll re test and if I'm still not happy I'll throw in my smaller light for now just to get started and once I get a bigger fan, I'll put the big one back. That should solve damn near all issues I have with this.
 
M

MadButcher

Well-Known Member
VegasWinner said:
Congrats excess hot air out and fresh cool air in always works best. Peace
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Yup, thanks!
Question now is wether to run it like that with the higher wattage bigger light or try to shoot for even lower temps with the smaller one. The smaller one has enough coverage Not sure what would be more beneficial, lower temps or higher wattage.
 
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