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grow box temps

jebus2029

jebus2029

Well-Known Member
I built a grow box with a 90w UFO and 2, 26w daylight 6500k CFL's. I have an exhaust fan leading to a carbon filter and a small fan inside to circulate air. It's been running a bit hot so I've been keeping the room cold. I just turned off the inside fan, which was pointed up at the lights, and the temp has dropped almost 10F. I'm assuming I was cooling the lights by blowing the air by them which was warming up the rest of the box. Any recommendations for what I should do? At night it is way too cold and during the day it gets borderline hot. Should I skip the inside fan until the plants are big enough to block the flow of air? Any other recommendations are welcome. Low temps are around 58F and high around 85F. Now with the fan off it is dropping and last I checked it was around 72-74.
 
djlifeline

djlifeline

Well-Known Member
work out a routine and set the fan up on a timer to perhaps give you a steady temp and a drop in the evening of about 10F. Up to you but thats what I would do in my opinion :)
 
corykindbud

corykindbud

Well-Known Member
jebus2029 said:
I built a grow box with a 90w UFO and 2, 26w daylight 6500k CFL's. I have an exhaust fan leading to a carbon filter and a small fan inside to circulate air. It's been running a bit hot so I've been keeping the room cold. I just turned off the inside fan, which was pointed up at the lights, and the temp has dropped almost 10F. I'm assuming I was cooling the lights by blowing the air by them which was warming up the rest of the box. Any recommendations for what I should do? At night it is way too cold and during the day it gets borderline hot. Should I skip the inside fan until the plants are big enough to block the flow of air? Any other recommendations are welcome. Low temps are around 58F and high around 85F. Now with the fan off it is dropping and last I checked it was around 72-74.
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try to keep your temp close to 75F, if that means moving your air intake to a warmer spot then thats a easy way to do it, my room gets real hot during the day so my intake comes from outside( its winter here) and it stays about 75. at night i have to bring my intake inside or it cools to about 58F.
 
jebus2029

jebus2029

Well-Known Member
Guess I'll just have to open the heating vents at night. Day temps are doing ok for the most part.
 
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