Grow Room Temp Too High.... Help...

Weed4Life

Active Member
The temps in his room were getting in the 90's until he added an ac. But because the room encapsulating the grow room is getting too hot.

My friend is having a problem with heat. He is running a hybrid system. 250w HPS, 7 -50w Corn cob full spectrum LED's with an air cooled hood. He is only running a 200cfm (4") exhaust/carbon filter to outside the plywood room. The problem is this, the grow room is built inside a converted patio/living space in back of the house. The walls are thin (foam with metal on each side) We live in the south east states. The only air is from a 1300 btu ac in the converted living space. That was not cooling sufficiently so he installed a 5000btu ac into the grow room to help the temps. it exhausts in the main room. I told him to some how ventilate the back room, but he is afraid because the babies are stinky since the heat brings the smell out and he doesnt want neighbors to know. He is a medical patient.
He has a 8" inline fan with a carbon filter in the middle of the converted room.

The babies are on week 6 of flowering.

He is using FFOF potting mix, FF Trio nutes, FF micro nutes and tap water that has sit out for 24-48 hours. He only ph's the water when he feeds. He feeds every other day. So, he feeds, waters, waters, waters, feeds, etc. He has had no problems with the health of the Purple Haze's from ILGM. He also has a couple fans on the inside to move the air. They get watered 1-2 time a day, half a gallon of water each, each time. I will post pics if needed.

So, how can my friend properly ventilate the converted living space without jeopardizing his OP? He is being super paranoid about his neighbors and wanting no one to know. With the ac cooling the grow room (8hrs of ac), the tempos are still hovering in the 80's.
 

psblunt

Member
Can you insulate the room? Maybe put insulation panels on the outside on all sides and top. The exhaust should be thru the carbon filter. And a vent low to the ground with some kind of mesh to keep bugs out. I would suggest hanging the carbon filter high on the top. Pull hot air out bring cold air in
 

hotrodharley

Well-Known Member
Holes into the attic and run that air through a carbon filter. Multiple holes. It then has to be replaced by more air. Hopefully cooler air. The heat from the A.C. is just being redistributed otherwise.
 

hotrodharley

Well-Known Member
And hint hint - tell him to seek low odor strains.

Before you ask Northern Lights is one. Bred specifically for these situations. Durban Poison is another. Easy to find.
 
Last edited:

Prince Vegeta

Well-Known Member
I was having similar issues
I took a downed gutter I had on side of my house
Ran a 90degree pvc pipe into it.
One end of the pvc is taped onto a corner of my ac unit.
Other end is going thru the wall into the room right against my oscillating fan. So it helps to circulate the cooler air.

Then i took my exhaust and ran it into my ceiling letting it all vent into the attic.
These 2 things dropped my room close to 20 degrees
That and running my light at night.
I'm also in the south so ikr
My new issue is the 90 degree daylight temps we have here
My rooms hotter then while my lights out than it is when it's on is nuts


Down side I noticed condensation in the room
Must be from the hot and cold. I personally need a dehumidifier as warm air holds more moisture
My Rh is close to danger zone
 
Top