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Offlinearachnospore
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Registered: 04/17/09
Posts: 58
Last seen: 4 years, 9 months
Heat and Humidity Issue
    #347086 - 01/13/10 05:53 PM (6 years, 10 months ago)

Hey guys,

I'm having some worries and need some advice with a growroom.  Based on the current setup, the growroom has a 600w HPS and produces upto 110 F of heat with a low 10 - 15% humidity.  This is without any plant in it and I'm wondering how much things will increase/decrease when I get the plant going in there?  I'm installing more fans at the moment so hopefully that should sort things but don't want to start until I'm completely sure I've got the right environment.


Cheers,
Arachnospore


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OfflineKaptKid
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Registered: 04/20/08
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Re: Heat and Humidity Issue [Re: arachnospore]
    #347102 - 01/13/10 06:11 PM (6 years, 10 months ago)

How arre you venting the heat?


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Offlinearachnospore
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Re: Heat and Humidity Issue [Re: KaptKid]
    #347120 - 01/13/10 06:27 PM (6 years, 10 months ago)

Ive got a 120mm fan bringing air in to the bottom of the closet and a 120mm bringing out the top.  I've also got 2 80mm that haven't been attached yet, but will be, to the either side of the HPS light.  One to vent the other to bring air in.  Would that cut down a lot of the heat?

Cheers


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Invisiblecoda


Registered: 04/20/08
Posts: 4,734
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Re: Heat and Humidity Issue [Re: arachnospore]
    #347121 - 01/13/10 06:30 PM (6 years, 10 months ago)

Fans are too small from the sounds of it.  how big is your grow space?  You want to buy a fan that moves twice the cubic feet of your grow space every minute.

Humidity tends to rise when you put plants in the grow room, you'll get a better idea of where that's sitting at once you throw some plants in there.


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Offlinearachnospore
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Re: Heat and Humidity Issue [Re: coda]
    #347128 - 01/13/10 06:46 PM (6 years, 10 months ago)

Well its only a closet grow so there ain't much space, 2 plants at the most unfortunately.  Tis about 2 x 3 x 6 feet.  There good fans though, well at least the 120mm are, move about 50cfm.  The little ones i'm unsure about.


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Invisiblecoda


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Re: Heat and Humidity Issue [Re: arachnospore]
    #347129 - 01/13/10 06:48 PM (6 years, 10 months ago)


a.) Intake of cool air
b.) intake of cool air passed over light
c.) extraction of hot air from light
d.) extraction of stale/hot grow room air passed through carbon filter


hmmm, how do you have your ventilation set up? Like above or are you just using the fans to extract air from the whole grow room?


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Offlinearachnospore
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Re: Heat and Humidity Issue [Re: coda]
    #347148 - 01/13/10 07:56 PM (6 years, 10 months ago)

The diagram is pretty much like the current setup with A coming through the bottom instead, B and C are the same and D is but doesn't have a carbon filter.  A and D are the 120mm fans.

Cheers


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Invisiblecoda


Registered: 04/20/08
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Re: Heat and Humidity Issue [Re: arachnospore]
    #347290 - 01/13/10 10:51 PM (6 years, 10 months ago)

Well, if you can afford it, i'd pick a 4 inch inline can style fan that does around 150 CFM or so.  If you can keep the ambient temps of your room in the 70's it should be easy to keep your grow cab in the low 80's (which is perfectly acceptable).


--------------------


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