Temperature issue

A

avalokitesvara

Active Member
Hi,

my setup is based on GH Aerofarm (plus an air pump to oxygen the solution). I'm trying to do a whole cycle only with a lot of Philips' Reflex fluorescent bulbs, in my past cycles I've achieved good results (compared to watt use, of course). My aim is to have small plants and to not have heating trouble. Despite of the 2 12" fans (intake and outtake) and the tower fan inside the box the temperature of the air and the nutrient solution is around 30-32°C (90°F).
Probably because the light are really closer to the plants and the aeroponic system.

Actually the plants don't have any signs of stress, they grow REALLY FAST, but I want to have an optimal temperature range to avoid stress and nutrient absorption failure.

My light cycle actually is 24/0 because I'm trying some autoflowering strains so the T is constant.

I've learned a lot of things here, thanks.
 
NLXSK1

NLXSK1

Well-Known Member
avalokitesvara said:
Hi,

my setup is based on GH Aerofarm (plus an air pump to oxygen the solution). I'm trying to do a whole cycle only with a lot of Philips' Reflex fluorescent bulbs, in my past cycles I've achieved good results (compared to watt use, of course). My aim is to have small plants and to not have heating trouble. Despite of the 2 12" fans (intake and outtake) and the tower fan inside the box the temperature of the air and the nutrient solution is around 30-32°C (90°F).
Probably because the light are really closer to the plants and the aeroponic system.

Actually the plants don't have any signs of stress, they grow REALLY FAST, but I want to have an optimal temperature range to avoid stress and nutrient absorption failure.

My light cycle actually is 24/0 because I'm trying some autoflowering strains so the T is constant.

I've learned a lot of things here, thanks.
Click to expand...
Yes, your temps are too high... What is your question?

Fans do not cool an area, in fact they can heat up an area due to the motor heat.

To cool down your grow chamber you need cooler ambient air to add to the chamber. If you have this then you need to increase the size of the intake ducts.
 
A

avalokitesvara

Active Member
My question is if exist a method to lower the temperature not using an air cooler, because, simply, they are too large to stay inside the box, the space is REALLY small, an half square meter. The motors of the fans do not produce heat beacuse they are magnetic, consume very little amount of watt, and produce a lot of ventilation.

Any help? :(
 
smppro

smppro

Well-Known Member
What size is this box how are the fans positioned? How many bulbs do you have. I keep my 5-42w cfls at 76 at the plants and 78 at the lights. I have a $12 exhaust fan from home depot(square kind not the inline ones) and 2 small holes for passive intake. you should be able to keep fluorescent temps down.
 
NLXSK1

NLXSK1

Well-Known Member
avalokitesvara said:
My question is if exist a method to lower the temperature not using an air cooler, because, simply, they are too large to stay inside the box, the space is REALLY small, an half square meter. The motors of the fans do not produce heat beacuse they are magnetic, consume very little amount of watt, and produce a lot of ventilation.

Any help? :(
Click to expand...
If it is colder outside the box then you need bigger holes to let the cold air in.
 
A

avalokitesvara

Active Member
Box is 65x65x160cm, I've inside 10 of 18 watt bulbs. My intake/outtake fan make 120 CFM.

Any idea to lower the temp? Is better the lower the solution or the plants itself? I think the solution is more important.

The outside temperature is around 22°C...
 
A

avalokitesvara

Active Member
Now the temperature of the water solution is around 25-27 degrees and the plants are at 24-26°... I think that's is an optimal value, isn't it?
 
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