Question about Intake/heat

MOD's. Please move to 'Grow Room Design & Setup'


I am currently building my grow room and im in the testing stage and have been running into high temps. I expected the heat to be a problem in my limited space and choice of 400w HPS.

Here is the basic layout of my room

Storage/Etc (bottom)
1.5' deep x 3' wide x 20" tall

Grow section (top)
1.5' deep x 3' wide x 6' tall



The back side of this closet/growroom is another closet. I have my intake pulling from here. The intake is a single 14"x6" opening. It connects to both the bottom and top area through another 14"x6" opening. There is a 6" fan pushing air around inside the top room as well.

Should have have more intake on the back side of my wall? Do you think it will help move air out faster and lower temps? I am currently running 87 degrees.

Just looking for an experienced opinion before i put another hole in the wall that I might not need.

Thanks!

get a higher powered exaust since your useing a passive intake it needs to really be sucking air through the rooms. this is the formula for figuring out how much CFM exaust you will need.

"all you need to do is take your cubic feet of the room (Length x Width x Height) and divide that number by the number of minutes you would like to exchange the air in the room (Only 1 – 3 Minutes is recommended) and that will give you the recommended minimum CFM that you need for that room,"

The top is about 30 cubic feet, so the 50cfm exhaust should be able to exchange the area almost twice a minute, if my math is right. Wondering if maybe my intake isnt allowing for smooth air flow

Ended up cutting another 14"x6" in to the other side and turned off the ventilation fan. got temps to 80-83 which should be perfectly fine. Going to wire in some 120mm pc fans instead and see if that disrupts the air flow a bit less than the walmart fan. 2x120mm fans is ample enough air movement for a 3-4 plant canopy (along with the fresh air being pulled in from the intake)?