400w HPS in a 4x2x5 cab?

bigv1976

bigv1976

Well-Known Member
Well I am currently growing in a 5x5 room built in my shed but paranoia has gotten the best of me and I am downsizing to a homemade cab for my basement. My cab is going to be 2 feet by 4 feet by 5 feet tall. My question is will I be ok with my 400 w HPS in there or will it be too hot?
 
it should be fine m8 i have a 400w hps in a 2ftx2ft square make sure you have plenty ov air circulation
 
unless your running a cool tube or the likes then i would say always vent. She be hot!
 
Ty bro!! It will be in a cool room with 2 computer fans for intake but I was hoping to limited the exhaust venting soI could use co2.
 
Well my cab is done and it is super stealth minus some slight noise. Problem is that I now have way too many plants. Gave 5 away last night and now I have about 12 seedlings that I will need to put out doors and hope for the best.
 
man that sucks. one of my boxes is 2'x4'x4.5 and i have heat issues whenever the ambient temp around it gets to74f. i have to run my fan if i have the 400 on but.... i also have 9 23 watt cfls in there. you should be good in a basement and no extra lighting in your box.I only have one 4" computer fan going in and 4" flex pulling off the light hood.hope this helps.
 
bigv1976 said:
Anybody? Need to know about venting.
Click to expand...

You must use sealed, air cooled reflectors in a cab.

lazaah said:
unless your running a cool tube or the likes then i would say always vent. She be hot!
Click to expand...

Temps with a 400 will soar well over 100 if you're using an open reflector.

bigv1976 said:
Ty bro!! It will be in a cool room with 2 computer fans for intake but I was hoping to limited the exhaust venting soI could use co2.
Click to expand...

Even though your basement is cool, those fans won't move enough of the hot air to make much of a difference. Use those for the dark hours, you need real power.

This is a photo of mine, its 400 watt, air is drawn in from the right, and gets sucked through and out the left via 80 watt, 170 cfm centrefuge fan.

Even with this, my temps can get into the upper 80s if I'm not on top of things. Granted, its not in a basement, but this cabinet is comparable in size to your proposed dimensions. BTW, if you can't tell, the hood is sealed.

f44uax.jpg
 
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