Struggling with heat in 2x2x4

S

simmadawna

Member
Here's my set up:
2x2x4 with one vent open on opposite side of carbon filter
Carbon filter inside with AC Infinity S4 mounted outside venting outside, fan speed three out of eight
HLG 135 QB288 kit @ 100% about 20" from canopy (driver mounted outside of tent)
Vicks humidifier on low setting (creates heat)
two photoperiods in early veg, but will likely be going down to one soon
Soil in fabric pots
I have my hygrometer taped to a chop stick and stuck in the soil

Current temps are 86°F/30°C and 56% RH

My ambient room is 73°F/23°C and 67% RH

I'm able to drop the temp two degrees when I turn off the humidifier but the RH drops to 47%. Ideally, I'd like to get the temps down and the RH up slightly. I'm currently waiting for a window mounted AC because I didn't expect to need it so soon. Next week I will have an ink bird humidity controller, temp controller. I have a dehumidifier outside the tent but it's currently off.

Is this normal? It's not even that hot around here. I can't help to think that I'm doing something wrong.

Thank you.
 
Failmore

Failmore

Well-Known Member
I have a 2x2x6 with a 600watt hps. When my apt is 73 set by AC my tent temp is 78-80. So you should be able to get that down. I pull air from the room next to the tent and vent into the attic. I have a 6" blower on 80%. If you vent to the same room that you pull air from that room is probably getting hot. Turn that fan up higher.
 
TreeFarmerCharlie

TreeFarmerCharlie

Well-Known Member
Why do you want the humidity higher? There's nothing wrong with 47% or even 40% during veg. There's also nothing wrong with 86°F when you are growing with LED, it's actually a pretty good temperature to be at for LED. I'm also curious how you are managing to have a lower RH in the tent than in the room the tent is pulling the air in from. I would suspect the sensor in your room (or the one wired to the S4 fan) is not accurate. I would get an additional hygrometer to compare to each of them
 
Comedydude

Comedydude

Member
If you have dimmers on your light, I would turn it down. You typically don't need anything at 100% in that set up. I have a very similar set up, different light, and that's what I do. My temps range from 71-78 the entire flowering period.
 
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ComfortCreator

Well-Known Member
Put a small / tiny fan blowing the humidity around the tops, turn up the humidifier a bit, and also speed up the exhaust. You should be able to optimize it with a few hours of playing around with the setup.
 
Crazy_Ace420

Crazy_Ace420

Well-Known Member
TreeFarmerCharlie said:
Why do you want the humidity higher? There's nothing wrong with 47% or even 40% during veg. There's also nothing wrong with 86°F when you are growing with LED, it's actually a pretty good temperature to be at for LED. I'm also curious how you are managing to have a lower RH in the tent than in the room the tent is pulling the air in from. I would suspect the sensor in your room (or the one wired to the S4 fan) is not accurate. I would get an additional hygrometer to compare to each of them
Click to expand...
Good info the bro
 
mauricem00

mauricem00

Well-Known Member
simmadawna said:
Here's my set up:
2x2x4 with one vent open on opposite side of carbon filter
Carbon filter inside with AC Infinity S4 mounted outside venting outside, fan speed three out of eight
HLG 135 QB288 kit @ 100% about 20" from canopy (driver mounted outside of tent)
Vicks humidifier on low setting (creates heat)
two photoperiods in early veg, but will likely be going down to one soon
Soil in fabric pots
I have my hygrometer taped to a chop stick and stuck in the soil

Current temps are 86°F/30°C and 56% RH

My ambient room is 73°F/23°C and 67% RH

I'm able to drop the temp two degrees when I turn off the humidifier but the RH drops to 47%. Ideally, I'd like to get the temps down and the RH up slightly. I'm currently waiting for a window mounted AC because I didn't expect to need it so soon. Next week I will have an ink bird humidity controller, temp controller. I have a dehumidifier outside the tent but it's currently off.

Is this normal? It's not even that hot around here. I can't help to think that I'm doing something wrong.

Thank you.
Click to expand...
13 degree rise seems like a lot for LEDs I ran a 150 watt hps in a 2 by 2 without a blower and only saw a 5 degree rise in tent temprature
 
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