Will a 640cfm cool a 1000w cab grow?

[thal]

The cabinet is 48" W, x 24" D x 72" H. The reflector will be the Daystar AC with 6" holes. The intake will be insulated ducting hooked from one side of the reflector to a 6" hole facing out. On the other side of the reflector a 6" carbon filter will be hooked up to the 640 cfm 6" fan, pulling the air away from the light and also pulling the air out of the cab, up through the filter, and exhausting it out the side.

There will be CO2 and a climate controller, so I would want to keep the temps at 80 degrees or so.

The room temperature will be set to 72 degrees.

Is that setup going to work to achieve the goal of 82 degrees? How close do you estimate I will be able to keep the top colas to the light?

 

[Arkaya]

about 400-450 CFM will effectively cool a 1,000 watt HPS/MH. You should configure the setup as follows Scrubber > Light Hood > Fan > Exhaust. It is better to pull the air then to push it.

You should be able to have the light about 12-16 inches from the top colas with no problems.

 

[thal]

Cool. I was hoping for 12", so 12-16" is a good estimate. By my calculations there is going to be roughly 8 sq ft, of floor space. That's 125w per sq ft!!!! If I can get the plants 12" away then I should be giving them roughly 109,000 lumens(145,000 lumen bulb minus 25% light degredation). That's pretty damn bright. Even the bottom of the girls should be getting some good light.

 

[NiteTiger]

You should configure the setup as follows Scrubber > Light Hood > Fan > Exhaust. It is better to pull the air then to push it.

You should be able to have the light about 12-16 inches from the top colas with no problems.

I'm curious about this statement.

Where did you get the idea it is better to pull than push? Same pressure, same ducting, same fan, same carbon, and carbon isn't uni-directional.

Also, if you're only getting within 12-16 inches with a cool tube, then something ain't working right

 

[thal]

I'm going to use a Daystar AC, I thought the cool tubes were a little different. Are you saying they are basically the same thing?

 

[NiteTiger]

Well, a/c hoods are the same principle, you just get the reflector built in. I'm personally using a homemade tube with a reflector mounted to it.

 

[thal]

How close do you think I will be able to get plants without burning them? 8"-10"?

 

[NiteTiger]

If it's done right...

 

[Maj.PotHead]

I'm curious about this statement.

Where did you get the idea it is better to pull than push? Same pressure, same ducting, same fan, same carbon, and carbon isn't uni-directional.

Also, if you're only getting within 12-16 inches with a cool tube, then something ain't working right

maybe he's venting into room fresh air is suplyed from ????



heres a cheap alternative i have 2 x 400w hps hooked to 1 stanely blower fan





i vent the lights heat into attick heres the stanely blower fan mod thread http://www.icmag.com/ic/showthread.php?t=29341

 

[NiteTiger]

maybe he's venting into room fresh air is suplyed from ????

Maybe, I could see that potentially being an issue