Requesting for little help in ventilating DR120-tent

[Toxie]

Greetings to all fellow tent-growers!

First I have to apologize if this subject has already been discussed in other threads, but somehow I couldn't find an exact answer to my problem. I already have received some info from helpful tent-owners, but some parts still confuse me a little...

I'm planning to run a 1000W HPS-light with 6" Blockbuster ac-hood in my Secret Jardin DR120-tent (47.25" x 47.25" x 78.75"). Also thinking of using two separate fans, one for the lights and the other with scrubber to cool the tent. Would 6" 449cfm inline-fans (similar to Vortex) get the job done? Should I use an active intake-fan? If so, should it be as powerful as the exhaust fan, or a smaller one for maintaining good negative pressure? Does intake-fan need a scrubber?

If passive intake is enough, should I use only the intake-flaps or keep all the intake-ports open? How can light leaking be prevented?

Well that's a lot of questions from a complete newbie, thanks for your patience!



Cheers

- Toxie

 

[Scrogerman]

(Edit) read below!

 

[Scrogerman]

Here ya go, have a look at the way Cheesey is running his ventilation. !

https://www.icmag.com/ic/showthread.php?t=177476

He's going, Scrubber-Duct-AC Light-Duct-ExFan-Duct-Out on his light run! & Scrubber-Duct-In, on his intake(smaller intake fan)! This one is pulling through the AClight.

maybe id go the same way with the AC Light Run & with the power of your 446cfm pulling through the Scrubber & Light, that'll prolly be sufficient for the whole cab leaving the intake passive bro! you can always add an intake fan later if required!(do that i would mate! passive intake) with a fan that size you still may need a fan speed controller, but it should be fine bro!

You could go a few ways as there are a few different configerations that will work. ie-
Scrubber-Duct-ExFan-Duct-AcLight-Duct-Out. (thats another config) This one is pushing throught the ACLight rather than pulling through it!

Both ways are pulling/sucking through the scrubber which is the more effective way of doing it, but this depends on the make of scrubber as some allow to push through them(but not many), most Carbon Filters require pulling through them & are hung inside the cab with extra strong mountings(watch this-weight can be a problem).

(sorry about the edits!)

Good Luck!

 

[Toxie]

Thanks for the great info Scrogerman, appreciated!

I still ponder if using two different exhaust-fans, one for cooling the lights and the other with carbon-scrubber for cooling the tent air would help more with temps in tent-setup like mine?

If I did them like this for lights:

Tent intake -> Duct -> AC-hood -> Duct -> Out of the tent -> Duct -> Inline fan -> Duct to exhaust (attic)

This way the light ventilation would be sealed off from the tent ventilation, like shown in here (4th picture): https://www.icmag.com/ic/showthread.php?t=112862

And for the tent exhaust I would do it like this:

Scrubber -> Duct -> Out of the tent -> Inline-fan -> Duct to exhaust (attic)

If the ventilation is done like this, would I need active intake too? 8" or 6" Vortex for the 1000W? I think the 6" Vortex/scrubber would be enough for exhausting the tent air?

 

[Scrogerman]

Yeah a seperate run for the Light is what i originally posted but thought id try to keep it simple, yes that way would work just fine bro, prolly need something like this in summer, maybe!
Although running the way cheesey there is seems to work just fine for him. Theres a fair few configurations that will work well!

the way you have just sugested, one run for the light & another for venting the tent(with scrubber) is the classic way of doing it imo!

Infact i had exactly the same config as that in my second to last set up. here:

https://www.icmag.com/ic/album.php?albumid=11451&pictureid=260635 (not a good example but it is two seperrate runs) using AC & standard lighting Rigs! (exhausting straight into a chimney-scrubber to out! & a seperate run for the AC lighting) Was a big room using Passive intake, you dont always need the intake fans is my point, can cause more problems than there worth bro! passive is usually enough!

ill post the showthread for you, not sure what pages may help you see it better though, but its in there somewhere!

Run it without intake fans to start off with, like i said before if then you feel you still need to pump intake air in then you can always add it later, its no probs!(as long as its negative pressure your fine) the walls of your tent will tell you- they will suck in slightly. (positive pressure is your enemy & adding intake will cause this, especially with static pressure)

have you read ventilation 101 on IC here!(im sure its a sticky but it can be complicated in parts)

Good Luck!

 

[Toxie]

Hey Scrogerman,

I found a good picture of this kind of setup from an old thread here: https://www.icmag.com/gallery/data/500/36904lightcan.jpg

Yes, I decided to use passive intake probably works just fine and is simpler too. By the way, do you need somekind of filter/diffuser to the light intake where the cool air is sucked through the hood, so it doesn't gather dust to the lamp?

Thank you for great suggestions and help!

 

[Scrogerman]

Hey bro, i used a pair of tights doubled up to stop dust(just over the intake-gaffa taped), its important imo, depends on the config, but yeah something like tights aint gonna cause too much static pressure!
Anything in obstruction at all is gonna cause a static pressure to varying degrees. IIRC, you dont wanna have to be messin cleaning lenses/glass/lamps, taking stuff apart to get at it etc.

The picture is a textbook example, nice one bro! Respect!

I think you'll be laughin, G'Luck mate!
Ill watch out for your showthread! what strain you gonna grow & what style, nutes etc?

oh i nearly forgot, if you use ducting with 2 x 360d bends on the outside of your tent then that should fix your light leak problem bro!(just bend the duct round yourself 360 x 2), once would prolly do it spray painted matt black but i still use twice, or build a baffle box.(sometimes i like to duct in out of the cavity walls, but it depends on the build.=no probs with light leaks) ive even ducted out of one too before now.
Ducting out the attice works well/smooth, one of my favorite ways, its simple!

 

[Toxie]

Thanks for all the help mate, we'll see what we can do! Laters!

 

[ambertrich]

Hey Toxie, good luck with you tent setup. You will like the DR120. Do you know if it is the original DR120 or the newer DR120II (or DR120pro)?

Just an FYI for odor control. To be sure you are not pulling unwanted smells through your lamp hood, take some foil tape for ducting and cover the gaps around the edge of the glass. Even with the rubber gasket most come with, there can still be air that gets past the gasket.
That size fan you have should be plenty to run both the scrubber and light exhaust on. I run a 1k in a DR120 with a similar fan size with no probs.

Good luck.

 

[Trichromedout]

Separate fans and lines for scrubber and hood exhaust is the way to go. Don't have to worry about smells outside that way. Carbon filter in tent exhausting outside of tent will give you plenty of circulation. Hood run off a closed system bringing in cool air and exhausting hot air. I switched to this system after adding a 4x8 to my 5x5 and have them lined up with 4 hoods being vented in a row.

 

[Toxie]

Just a minor detail, if anyone could enlighten me. Would it be (if possible) more preferable to pull the intake air for the lights from outside the house to help them stay cooler?

 

[Scrogerman]

What ever is convienent bro on that one, yeah its gonna help to keep the lights cooler in most cases. Using cavity walls is a good option ive used a few times, just make sure theres a decent airflow in there(Cavity) & your good to go, & its more concealed, ie- no vent on outer wall etc. Just a thought for ya.

 

[cheesey]

im running my xxl the wrong way in sucking not blowing . so i do get little smell out side the room .

best way i would say is get a fan and filter and put that in your tent . then run a fan just for the blockbuster (just to cool it )

 

[Snagglepuss]

I have mine setup like your suggestion.

I have 2 cool tubes ,1 ..400 and 1.. 600,and a 6 inch vent on each side of the tent.I run a fan blowing through one vent on outside of tent through one tube then the other then out the other vent and into the wall.The scrubber sits vertical ,with its own fan on top blowing out a vent in the roof of the tent and into the room .

So far the lights and scrubber. using different fans/ducts works great ,theirs no air resistance for the cool tubes and air just sails on through their,removing the heat.I can smell the exaust from the scrubber ,and decide whether to dial up the fan speed(using the speed controller) ,or slow it down ...or replace the filter if necissary.Also have portable ac in tent ,that vents directly to the wall.Good Luck!!

 

[qbert]

I'm planning to run a 1000W HPS-light with 6" Blockbuster ac-hood in my Secret Jardin DR120-tent (47.25" x 47.25" x 78.75").

Also thinking of using two separate fans, one for the lights and the other with scrubber to cool the tent.

Not necessary, unless your ambient temps are over 75* F.

Would 6" 449cfm inline-fans (similar to Vortex) get the job done?

Yes. That is a good size.

Should I use an active intake-fan? If so, should it be as powerful as the exhaust fan, or a smaller one for maintaining good negative pressure? Does intake-fan need a scrubber?

I only recommend an intake fan if you are going to suck through a hepa filter. Unfortunately, that gets to be a spendy option, and I'm not sure if really is an effective control against pests and molds.

If passive intake is enough, should I use only the intake-flaps or keep all the intake-ports open? How can light leaking be prevented?

If you are not using hepa filters on the intake, passive is perfect. I like to use the flaps and leave the ports closed. The flaps provide plenty of air intake when all open, and the screens catch plenty of dust and crap, versus a big wide open port hole.

I simply set a piece of cardboard leaning over the flaps on the outside of the tent. That acts as a shade to prevent light coming in (to be fair, I don't have lights on in the room usually during their dark cycle. when there is, some light gets into the tent, half-moonlight levels).

Here ya go, have a look at the way Cheesey is running his ventilation. !

https://www.icmag.com/ic/showthread.php?t=177476

He's going, Scrubber-Duct-AC Light-Duct-ExFan-Duct-Out on his light run!

This is a bad idea.

Light hoods leak a lot of air. If your exhaust fan is after the hood, pulling through it, you will pick up unfiltered air.

You can, of course, seal the entire hood, but that's just a PITA. The only other option is pushing through the filter at the end.

Filter->Fan->Hood->Out

or any configuration with the filter at the end.

 

[Scrogerman]

Bad idea, whateva mate!, it would work was my point, of course seal up any gaps around the gasket on the AC Hood, people aint stupid! & anyway running 2 fans, one for the AC Hood & another for the Scrubber is the correct way to run a cab mate.

 

[cheesey]

Bad idea, whateva mate!, it would work was my point, of course seal up any gaps around the gasket on the AC Hood, people aint stupid! & anyway running 2 fans, one for the AC Hood & another for the Scrubber is the correct way to run a cab mate.

yep its a shame i cant run a rvk just for the hood but the wall at the hiddenroom is 14" thick lol to much hassle to make a hole . when my room is empty im moving the rvk into the room FILTER RVK DUCT HOOD DUCT so its pushing the air not blowing .. 2bh we are only getting a little bit of smell atm out side and the ono gel in the ducting stops that 110% .

 

[Scrogerman]

This is a bad idea.

Light hoods leak a lot of air. If your exhaust fan is after the hood, pulling through it, you will pick up unfiltered air.

You can, of course, seal the entire hood, but that's just a PITA. The only other option is pushing through the filter at the end.

Filter->Fan->Hood->Out

or any configuration with the filter at the end.

Bad idea, whateva mate!, it would work was my point, of course seal up any gaps around the gasket on the AC Hood, people aint stupid! & anyway running 2 fans, one for the AC Hood & another for the Scrubber is the correct way to run a cab mate.

Scrubber-Fan-Out, for your tent
&
Fan-Ac Hood-Out on a seperate run for your Lighting. That mate is the proper & classic way to do it as had already been said, i sugest you go check it out.

I sugested the way Cheesey was doing because its simple, but 'not' with the active intake fan, i sugested passive.
(he has already stated its not exactly the right way to do it, but imo it works-ive done it myself)

Infact if you look at the way you have configured it, it is exactly the same way as i sugested(the second set of configs). so lol!
you need to read the thread properly mate!(you are agreeing with me anyway lol!) i did say it could be done this way!(fyi, 3rd main paragraph in post#3-ok buddy)

the fact is there are several configs that will work but 2 runs is the correct way & was the best advice.

Ona Gel, sounds good stuff im gonna have to me some.! Cheers cheesey!

 

[qbert]

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