How much heat will a 140 mm Fan dissipate (Heat Watt/Sq In)?

unbindmoney

Active Member
I'm planning on adding 1 or 2 140 mm Fan to a 5.866" x 22" and was wondering how much more Heat Watt per Square Inch it will dissipate. Thanks the help!
 
a lot. rule of thumb is that an actively cooled extruded bar removes 3x as much heat as a passive (40 cm^2/W vs 120 cm^2/W)
 
For only 22", if you plan on using more than TWO COBs, definitely use 2 fans. Mine are 36".

Planned on running 4 COBs @ 700-1050 mA (1050 mA MeanWell HLG-240h-1050b), would 2 140mm fans on a 22" work?

Edit: This is for my 2'x2'x4' Veg/Clone tent btw, not my flower tent :D
 
sure, provided your heatsink is thick enough, the entire heatsink takes the heat pretty evenly. put each fan between 2 cobs and you'll be money. you dont need one fan per cob, just need to keep the air moving
 
You only need an HLG-185H-c1400B for 4 cobs at 1400mA.

Thanks, I just posted a 1400 mA drive so people know which drive current I want to run it at. The 185H was probably the one I looked at that fit the 4 COBs perfectly, probably just put 240H out of mistake :D
 
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