Heat Extraction

Fight for Right

Fight for Right

Member
In a 3ft x 4ft x 8ft space with a 400 watt hps light what type of heat extraction would work optimal? Also the ballast would be built into the hood.
 
Punk

Punk

Well-Known Member
Fight for Right said:
In a 3ft x 4ft x 8ft space with a 400 watt hps light what type of heat extraction would work optimal? Also the ballast would be built into the hood.
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Hey bro, word to the wise, don't use a hood mounted ballast.

I'm guessing you're going the budget route and using a parking lot light, you can do it, but you need to rig you ballast so it's remote, like the traditional hps/mh grow systems.

The bulb itself puts off so much heat, controling just the light heat is tricky, but if you have the ballast on top of the hood, forget it. It can't be done in an enclosure.

You need a cool tube, or some type of air cooled reflector and a high power fan doing the work, and that's just for the light.
 
Ian Singerdale

Ian Singerdale

Well-Known Member
Punk said:
Hey bro, word to the wise, don't use a hood mounted ballast.

I'm guessing you're going the budget route and using a parking lot light, you can do it, but you need to rig you ballast so it's remote, like the traditional hps/mh grow systems.

The bulb itself puts off so much heat, controling just the light heat is tricky, but if you have the ballast on top of the hood, forget it. It can't be done in an enclosure.

You need a cool tube, or some type of air cooled reflector and a high power fan doing the work, and that's just for the light.
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I completely disagree. I have a hydrofarm 400 convertible ballast/hood/reflector system running a solarmax super HPS right now, in a closet about exactly that size, and my temps never get above 79 degrees twelve inches from the light.

I do have a very good elicent inline duct fan running 309 CFM. The hood is aircooled with a small computer fan extracting heat outside the closet

So I would say you need a fan capable of 250 cfm or more, especially if you are also running a charcoal scrubber like me. Lowes / home depot sells various model very cheap
 
Punk

Punk

Well-Known Member
Ian Singerdale said:
I completely disagree. I have a hydrofarm 400 convertible ballast/hood/reflector system running a solarmax super HPS right now, in a closet about exactly that size, and my temps never get above 79 degrees twelve inches from the light.

I do have a very good elicent inline duct fan running 309 CFM. The hood is aircooled with a small computer fan extracting heat outside the closet

So I would say you need a fan capable of 250 cfm or more, especially if you are also running a charcoal scrubber like me. Lowes / home depot sells various model very cheap
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OK, well those are a digital ballast, so, since there wasn't much info, that would be the exception, but you still need to have it air cooled, and recommending a shit ass fan from lowes isn't going to move enough air, and you know that.

All they sell is cheap booster fans.
 
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