Grow Room LED growbox heat issue

[larsel]

Hello


I just recently finished up my box and am now testing it to control heat and humidity.
I am using a 300w mars hydro LED (~150-170 draw power).
the size of the box is 1m tall, 1m wide and 0.5m deep, with an extra top to place the light. it is 0.6m^3.
My passive intake hole is twice the size of the hole my exhaust fan is located.


At first when i had my light on, my oscillating fan and my exhaust fan the temp quickly rose up to 33-34 celsius and then stalled at that point.
I then tried stopping my oscillating fan and shortly after the temp fell down to 28-29 celsius.
However i would like to the temp a tad lower, and need suggestions on what i could do to achieve this?
Maybe i should make the passive intake hole a bit larger? I kinda dont want to add more exhaust fans as this will make it harder for me to controll humidity

 

[jackmc]

Hi larsel, How complex do you want to get? The simplest method would be to contain the exhaust from the light and vent it outside the cab. so it does not contribute to the temp. I am using a Mars Hydro II LED in a small space. I don't move the light up and down during the grow. With Summer coming I've been considering cutting a hole in the top of my tent to let the light in and keep the heat out. I don't think you have anything to worry about with a temp in the 28C-29C range but you are going to want to get the fan going during flowering. As far a humidity is concerned I find that I have to vent more in flowering to evacuate the humidity. So your solution might be to vent more air to reduce the temp. and humidity. Is it particularly dry where you are?