Help on how to cool down new grow light

Gregor Eisenhorn

Gregor Eisenhorn

Well-Known Member
The stronger the fan is, the more efficiently it will pull the heat coming from the bulb. Do a little research and see what other people have for a 400Watt HPS. There's no point spending money on a 1000cfm fan (I mean it would be a good option) if you're a bit strapped for cash. For my 250watt hps a 240cfm fan does the jpb, so maybe for you 400 watter a 300-400 cfm fan will be good?
 
HydroRed

HydroRed

Well-Known Member
Gregor Eisenhorn said:
Your second option. This is a better one because the whole system is enclosed, but it requires more work, more money spent (because you will need a second fan to bring air into the tent)
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With the setup in both of your drawings, it is doing nothing to keep the actual room cooler. All that is doing is blowing some heat from the light out the tent. There are no "cooling" properties to either of the setups in your drawings. Plus the fan will get too hot from being on the wrong side of the light.
 
Gregor Eisenhorn

Gregor Eisenhorn

Well-Known Member
Well it depends what school you follow, some people prefer pushing and some pulling.

In the second option I wrote that he would have to have another fan for exhausting the tent itself.
The first option is fine if the fan is powerful enough. It sucks the heat from the bulb and acts as an exhaust for the whole tent, thus cooling it.
 
saiyaneye

saiyaneye

Well-Known Member
Gregor Eisenhorn said:
Well it depends what school you follow, some people prefer pushing and some pulling.

In the second option I wrote that he would have to have another fan for exhausting the tent itself.
The first option is fine if the fan is powerful enough. It sucks the heat from the bulb and acts as an exhaust for the whole tent, thus cooling it.
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To each his own. I would suggest pushing through to extend the life of the fan motor.
 
Germama

Germama

Well-Known Member
Ok my biggest prob is getting the hot air from the light out of the room. I have no windows in the room just gonna have to let it blow into hallway I guess
 
T

THE KONASSURE

Well-Known Member
Germama said:
I just set up my new virtual sun tent and 400 watt ipower air cooled light and it is runnin a little too hot. I have no air conditioning in room the tent is in so I need the tent to be as cool as possible. The light is my first of this type and I am not sure how to cool it down. If you can see in one of the pics there are two 6" sleeves on each side of light in suntent if your familiar with those you know what I'm talkin about. If they are hooked over the ends of the light for air to run through it doesn't cool the light down enough for me to grow in the summer I am not sure how to hook up an exhaust fan to end of light with the sleeves because it will not be pulling from within the tent am I supposed to close one side off of the tent and exhaust out other side? Would that help any more than just a fan on end of light blowing through? Any suggestions welcome thanks.
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handy tip put insulated ducting over the tube and cut a hole for the light in the ducting, that insures more heat is vented down the pipes

if you saw the last episode of "the walking dead" the saviours used that method on 2 cool tubes that were hanging in a locked room, think they were growing weed but could`a been crops
 
lawlrus

lawlrus

Well-Known Member
saiyaneye said:
To each his own. I would suggest pushing through to extend the life of the fan motor.
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How do you maintain the negative pressure necessary to keep odor at bay if you are pushing rather than pulling? Does your carbon scrubber still work while pushing it?
 
saiyaneye

saiyaneye

Well-Known Member
lawlrus said:
How do you maintain the negative pressure necessary to keep odor at bay if you are pushing rather than pulling? Does your carbon scrubber still work while pushing it?
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I would push through a cooltube

but on a carbon filter

I think you HAVE to pull from the carbon filter from what i understand for maximum effectiveness. My carbon filter is working great. My tent sucks in
 
lawlrus

lawlrus

Well-Known Member
saiyaneye said:
I would push through a cooltube

but on a carbon filter

I think you HAVE to pull from the carbon filter from what i understand for maximum effectiveness. My carbon filter is working great. My tent sucks in
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I misunderstood, I thought you meant the main air exchange was from pushing the inline rather than pulling through the scrubber.
 
T

THE KONASSURE

Well-Known Member
you put the fan before the light otherwise the light`s heat can dry up the fans bearings

but if there`s a long run of venting between the light and the fan then you can put it after just any long run of ducting your better blowing down as sucking can make the ducking get smaller and finding any leaks is harder
 
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