Properly Venting & Filtering Yieldmaster II in a Secret Jardin 120

H

Harorld

Member
Hey all,

I’ve been spending the past week soaking in the information here and finally have a question. I’m seeing photos, videos, drawings etc of a number of different grow tents, and everyone has their inline/light/filter setup differently. I’m kind of confused on the proper, most efficient and effective configuration for setting up the light/hood, inline fan, and carbon filter.

Does this guy have everything set up properly? It looks like he has his filter strapped to the back of the tent?

http://www.youtube.com/watch?v=WVqu4oz2EbM

I’m planning on using a 400w MH/HPS system in a Secret Jardin 120 with two 4” inline fans and a carbon filter. Is this configuration (below) totally wrong?

alternate.jpg

Ah! Can anyone help me configure this setup properly?
 

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Just edited the configuration of the 2 inline setup. I realized that you're supposed to hang the carbon filter on the straps on the back of the tent. I feel like my setup isn't quite right thought.. Should there be something happening on the other side of the light hood (the side without any duct?)
 
you just need to attach your filter on the inline side of the light. The opposite side needs to be ducted to wherever you want the air to be expelled to. Like another room or outside. So you are drawing air through filter-light-outside in that order.
 
KrAzY80 said:
you just need to attach your filter on the inline side of the light. The opposite side needs to be ducted to wherever you want the air to be expelled to. Like another room or outside. So you are drawing air through filter-light-outside in that order.
Click to expand...

I’m a bit confused. I thought you were supposed to

  • draw in fresh air (from outside the tent) to cool the light
  • run the air inside the tent through a filter, and expel it out of the tent
It sounds like the set-up you describe is what’s being used in the video?

In the set-up you describe, wouldn’t the air being expelled from the tent actually be “unfiltered”?

Would this set-up benefit from an additional inline fan (ie: is the set-up in the video providing enough air-exchange?)?

 
As long as the light has glass sealing it than the air being expelled is filtered by the carbon filter.
If you dont have a sealed light than this set up would not work obviously.
The way I look at it you knock 2 birds out with one stone using the diagram above. You are just pushing the heat from the light to another room and Intake will provide cool air to your tent which is the same air that is going through the filter and light.
The air in your tent is going to be cooler than the air in your light right. So by pulling that cooler air from the tent you will be cooling the light.
It has to go through filter first right before it goes outside your tent so its filtered = No smell outside your tent.

Hope this helps, tried to put in a few different perspectives for you. Ag again light must be sealed for this to work.
 
And Yes this exchanging the air in your tent.
You only need one fan to pull the air through filter and light.
But some like to use another fan on the intake air but it will draw by itself.
 
what ^^ is saying, you want to expell the air that is inside your tent not draw straight thru tent and back out.
my set up goes: carbon filter/ducting/hood/ducting/inline fansucking air/ducting to where ever you want to expell that air to.
this way the air in the tent is being exchanged, on a 120 tent i have one vent open at the back for passive intake and so the tent is slightly sucked in causing negative pressure.
 
Just make the sure the hot air coming out of the hood goes OUTSIDE the tent...otherwise you just made yourself a heater.
 
Thanks for the input. I spoke with someone at Greners and they provided this diagram:

diagram.png

they said that the filter is going to be placed outside the tent as well as the inline fans.
The only thing that should be inside your tent is the light and pieces of ducting on each end of your light for the air cooled system.

This kinda sounds different than the setup where the carbon filter sits IN the tent, no?
 
In order to save headroom you can put the filter outside and push through it instead. The filter will work in both directions.
 
also make sure you are are BLOWING cool air through your light as opposed to SUCKING hot air through your light. Much easier on your fan and should make it last longer.
 
Thanks guys. One inline pulls air from outside the tent, through the hood, warm air out the other side and out of the tent. Exhaust is on bottom of the tent. The second inline is pulling air out of the tent and into the carbon filter (which is outside of the tent) which expels the filtered air into the grow room.
 
wowzerz said:
also make sure you are are BLOWING cool air through your light as opposed to SUCKING hot air through your light. Much easier on your fan and should make it last longer.
Click to expand...

If your fan is rated to take the heat, use it to suck the air. It will be a lot more efficient at pulling the hot air out than blowing it. It will also ensure that your air-cooled hood stays well sealed from the small vacuum it creates. However you set it up, make sure to filter any air that gets pulled through the light hood. If it isn't filtered you'll find yourself constantly having to clean the dirty glass.
 
just one more thing, your exhaust wants to be at the top of your tent not the bottom as heat rises and your filter wants to be there too, inlet wants to be at bottom, be it passive or inline.
 
freddiemoney said:
If your fan is rated to take the heat, use it to suck the air. It will be a lot more efficient at pulling the hot air out than blowing it. It will also ensure that your air-cooled hood stays well sealed from the small vacuum it creates. However you set it up, make sure to filter any air that gets pulled through the light hood. If it isn't filtered you'll find yourself constantly having to clean the dirty glass.
Click to expand...
It would seem that any unneccisary stress on the fan (ie heat) is a bad thing. Also you mention the air cooled hoods having a "better" seal while pulling. I am not saying it would not have a better seal, but I would rather have hot air leaking into my sealed room from the hoods, then stinky air being pulled out of my grow room. (i run a sealed room) I dont know about you, but most of the vented hoods I have seen do leak to some degree. even with massive amounts of tape and caulking they still leak. I would rather have a little hot air introduced into the room then a little stinky air getting out.
 
wowzerz said:
It would seem that any unneccisary stress on the fan (ie heat) is a bad thing. Also you mention the air cooled hoods having a "better" seal while pulling. I am not saying it would not have a better seal, but I would rather have hot air leaking into my sealed room from the hoods, then stinky air being pulled out of my grow room. (i run a sealed room) I dont know about you, but most of the vented hoods I have seen do leak to some degree. even with massive amounts of tape and caulking they still leak. I would rather have a little hot air introduced into the room then a little stinky air getting out.
Click to expand...

Most quality inline fans are rated to a higher temp than what is coming from the lights, especially in the larger sizes as they're made for commercial type applications. The possibility of a bit of smell escaping could be a factor if everything is not sealed up tight, my hoods are sealed and I have no problems with smell. My fan tends to be louder and sounds like it is working much harder when it is trying to push the air through the lights.
 
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