Will 5 COBs heat up my closet?

A

Alex77145

Active Member
Hello, everyone! So I have a 2x3x5.6 closet and I am planning on buying 5 clu048 1212 for this closet. I will be running them at 36w each.

The problem I have is that the t in that closet right now is about 61°f.

My question is, will those cobs raise the t in the closet to about 72°f ?
 
freemanjack

freemanjack

Well-Known Member
Alex77145 said:
Hello, everyone! So I have a 2x3x5.6 closet and I am planning on buying 5 clu048 1212 for this closet. I will be running them at 36w each.

The problem I have is that the t in that closet right now is about 61°f.

My question is, will those cobs raise the t in the closet to about 72°f ?
Click to expand...
The most efficient cobs are currently around 50% total conversion efficiency, so your 180w rig will emit roughly 90w of heat and the heated air will (if not vented) recirculate getting hotter with each pass of the heatsink. In practice cob's convert roughly twice as many watts into light than hps but that still leaves a significant amount of heat needing dealing with, you can always have your fans on a thermostat so if its too cold, they don't run.
 
Moflow

Moflow

Well-Known Member
Alex77145 said:
Hello, everyone! So I have a 2x3x5.6 closet and I am planning on buying 5 clu048 1212 for this closet. I will be running them at 36w each.

The problem I have is that the t in that closet right now is about 61°f.

My question is, will those cobs raise the t in the closet to about 72°f ?
Click to expand...
I have 200w in 32" x 32" x 5ft tall tent in an un insulated out building.
It's 15 - 16oC / 61F-ish ambient in the out building.
When lights are on in tent I get 22-24oC - 73F - ish
The tent is temporarily insulated at moment.
I have inlet and outlet fans on a fan speed controller.
I will upgrade insulation around tent shortly.
Not ideal temps for optimum growth but they will still grow....... ;)
​
 
P

Photon Flinger

Well-Known Member
freemanjack said:
The most efficient cobs are currently around 50% total conversion efficiency, so your 180w rig will emit roughly 90w of heat and the heated air will (if not vented) recirculate getting hotter with each pass of the heatsink. In practice cob's convert roughly twice as many watts into light than hps but that still leaves a significant amount of heat needing dealing with, you can always have your fans on a thermostat so if its too cold, they don't run.
Click to expand...

Not really. They are far more efficient than 50% when under driven. Add more cobs until you stop producing unacceptable heat for the same amount of power. End.
 
Moflow

Moflow

Well-Known Member
I also had to rig a 12v pc fan attached to a length of 4" ducting to suck the warm air at top of tent and discharge heat to plants below
Where there's a will there's a way....
:cool:
 
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