Help, Too HOT in here! need to upgrade indoor vent

[Frijol]

Hello, i always had a problem with the temp, however in winter it was ok, i mean it was controlled after a lot of efforts, but now the spring/summer as arrived and im having too hot temps.

So im searching a way to get those temps lower, i have a plan but i dont know if it could make any difference, so i need your advises please!

Indoor details:
Wood closet
40cm X 60cm X 2.10cm (in inches: Wide;23, Depth; 15, Height; 82)
It have two "rooms" veg and flower, veg is bottom and flower on the top, veg is about 37 inches tall and flower about 43 inches tall.
Lights: Veg room: 7 x 42 Watts Cfl - around 2800 lummens each. Flower Room: 1 x HPS 250 Watts.
Ventilation:
-One "Centrifugal Fan (vortex) 230 m3/h placed in the top left corner in the flower room attached to carbon filter.
-One fan 180 m3/h which blow airs inside the indoor placed bottom left in the veg room.
-One Clip Fan moving the air in the veg room.
-One inline fan blowing directly in front of the hps bulb.
-some holes and 2 mini computers fan in the table which divide the 2 rooms for letting the air go up (they are covered for total darkness in the flower room)

Veg room never has temp problems, winter or summer works smooth.
Flower room more complicated, winter 25-31 C° (77-87 Farenheit) but in summer go a lot higher 29 - 38 C° (84 - 100 Farenhiet).

So i believe that the space is too small then the heat "stuck" there even thoug the extractor has a lot more capacity than the volume in my ENTIRE room (veg-flo). so maybe to help this i was thinking putting 2 big fans 100m3/h at each side in the middle table which separate the 2 rooms in order to take out the air from bottom veg room (which is colder than the air in the top room) and blowing in this air to the flower room.

HELP please!!!
Thank you!

 

[Mikell]

2 square feet with 250w?

That's your problem right there.

 

[Frijol]

2 square feet with 250w?

That's your problem right there.

What you mean? too much or too little light? id readed that the 250 hps is the min wattage to get decent buds, so 150 w wasnt an option.

 

[Granger2]

250w divided by 2 sq ft = 125w/sq ft. Way too much. 150 would be 75w/sq ft. Better, but still a lot. -granger

 

[Schlicht]

Dear colleague, it looks like you have multiple factors contributing to the heat problem:

1. Some of that heat generated in grow space travels via "small holes" to the bloom space - just simple physics. I wouldn't add any more fans between spaces for that reason.
2. As stated above by Mikell & Granger2, 250 HPS is too much for approx. 7 cu ft space, hence more heat is generated. However investing in new "adequate" lighting is not the best solution. A screen or ceiling at flower room light level would help. Use styrofoam board w/ reflective film & few openings for this purpose. This would create very hot ceiling plenum but your exhaust fan in "upper left corner" should take care of it.
3. Please clarify if your flower space light is ducted (w/ air cool hood). I'm not clear on this one. Vortex typically is in-line fan & centrifugal fan is mainly exhaust fan for end-cap installation.
4. All these fans also generate some heat. If feasible, I would move "top left corner" fan outside the flower room.

Let me know if any of the items above are confusing - I'll do my best to elaborate.

It's nice to have Summer in December)))

 

[Frijol]

Dear colleague, it looks like you have multiple factors contributing to the heat problem:

1. Some of that heat generated in grow space travels via "small holes" to the bloom space - just simple physics. I wouldn't add any more fans between spaces for that reason.
2. As stated above by Mikell & Granger2, 250 HPS is too much for approx. 7 cu ft space, hence more heat is generated. However investing in new "adequate" lighting is not the best solution. A screen or ceiling at flower room light level would help. Use styrofoam board w/ reflective film & few openings for this purpose. This would create very hot ceiling plenum but your exhaust fan in "upper left corner" should take care of it.
3. Please clarify if your flower space light is ducted (w/ air cool hood). I'm not clear on this one. Vortex typically is in-line fan & centrifugal fan is mainly exhaust fan for end-cap installation.
4. All these fans also generate some heat. If feasible, I would move "top left corner" fan outside the flower room.

Let me know if any of the items above are confusing - I'll do my best to elaborate.

It's nice to have Summer in December)))

Hello Shlicht, i will take a pic today when i get to my indoor, maybe it will be easier to relate to the problem.
The fans generate little heat, the point 3 i didnt understand.
I have little money, and i prefer not to change the 250hps, or improve the exhaust (abd i did the math and 230m3/h is a lot for my space, so i dont believe is a exhaust problem) i just have money to buy 2 or 3 bathroom like inline exhaust fans.

 

[Schlicht]

Frijol, sorry about confusing item 3. A photo would help to understand.
The goal is to remove as much heat as possible from the top space or to keep hot air away from the plants. If the light & fans in your bloom space are not connected by ductwork, the best you can do is to increase air supply from outside of the top cab (not from veg room). If your HPS light housing is capable of being connected to flex duct - I suggest to do so.
In my case, heat was a big issue too, even though my tent was larger than yours & I had separate ductwork just for HPS light cooling. Eventually I switched to LED. I have no idea if dimming HPS would help w/ out impact on flowering - you may want to ask others.

 

[grouchy]

You can lower the heat entering the flower room by decreasing the heat generated in the veg room. Look into some of the daylight led bulbs that they sell. You could go from 42w cfls down to 11-15w leds and not lose much light in the veg area but lose tons of heat. The led bulbs shine 100% if their light downwards so you will not need as much wattage to replicate the same amount of light. There is a good thread in the micro section about this style of bulb and tests showing how much more light they output.