Air-Cooling Lights

[brownstormy]

Tried looking around but haven't found anything yet.
Just wondering if anyone has any equations for calculating CFM requirements for aircooling rows of lights.

Looking for how much cfm is needed per 1K in line, and how many can be in line per fan.

Bigups for any help or direction!

 

[Cobra420]

From the Ventilation 101 thread.

"Cool Tube or Ventilated Hood - exhaust air temp 20 - 30 *F. Hoods can be connected together to a common fan at 20 *F rise per hood, no more than 4 hoods for a total rise of 80 *F."

So for a 1k, the chart on that page is saying 158cfm per 1k for a 20* rise. If up to 4 hoods, you would need 632cfm for an 80* rise (158cfm x 4 hoods). So going off that, I'd say a minimum of a good 8"+ fan but bigger may be better in this situation. Many different variables at play here so knowing a little more about the setup will help.

I've used a 6" inline to cool 3 - 600w, inline, with ease. Exhausting it out of the grow area was key in my situation though.

Hope that helps.

 

[Granger2]

For multiple lamps it's better to have 1 duct [or plenim] for intake with duct that goes to each lamp, and another duct for exhaust with duct coming from each lamp. Exhaust fan pulls air thru system. That way each lamp gets cool air rather than increasingly hotter air from the other lamps. Everywhere possible, use straight metal duct with "T's" to attach flex duct to lamps. Good luck. -granger