Best way to vent grow tent outside the room its in???

RobMarley420 · Apr 23, 2011

I'm looking for the best way to vent my growtent outside of the room it is sitting in.

It has an air cooled 600wattHPS but if the air isn't vented outside of the room then the room gets too hot and the hot air just re-cirulates in my tent.

I'm thinking that venting the hot air out the window would be better than venting it into another room in the house, but I don't know how to do that without looking suspicious.

BongRipkenJR. · Apr 23, 2011

Here is mine. A 6 inch fan outside the room sucks air through 2 lights and a carbon filter and pushes it outside the room into the attic space. I will have to do a ceiling patch after I am done with this room, but it works.

FreedomFightr · Apr 23, 2011

BongRipkenJr. U should put your inline fam on your carbon filter and push thru those lights and keep that fan cooler. Right now you are sucking all the hot air thru your fan and creating more heat inside the fan. Those aint cheap! But it works 100% both ways.

BongRipkenJR. · Apr 23, 2011

I cant fit the fan on the carbon filter. Not enough room. The fan was cheap though. I got two new ones for about a half ounce of low grade hash.

Catchin1 · Apr 23, 2011

you should not

you should not

you should not vent just right up into the attic. You vent to the soffit or the gables. You will get mold in your attic and then you will be really screwed when the abate crews have to come in and blast your attic with dry ice pellets to get rid of the black mold spores accumulated from not venting your grow room exhaust to the outside not just into the attic space.

BongRipkenJR. · Apr 23, 2011

I dont have mold in my room or high humidity. I live in a semi hot arid area. The roof space also has a lot of ventilation in it.

FreedomFightr · Apr 23, 2011

I also an considering venting my AC exhaust into the attic. I hate venting out the window. Not very low key if you know what I mean.
RobMarley this is what I built to vent my tent.

edgey · Apr 23, 2011

i vent into the veg room in the attic but have replaced 4 bricks in the chimney stack with air bricks to help vent it outside

edgey

Scrogerman · Apr 23, 2011

Either straight into the Attic, or you can use the Cavity(wet-dry)walls, Cavity can be handy for inlet air too(not winter). both simple to repair after ops are finished! Like Edge sugested if you can use a chimney thats handy, just make sure you put a 360 bend in your outlet duct, so no light can escape.

FYI with most houses/builds, Attics vent out of their eave vents/soffits, they breath, so its very unlikely you'd get any sort of mold, i been doing it years & never had an issue.

G'Luck!

cody2white · Apr 23, 2011

Thats some great advice scrogerman. Thank you :tiphat:

pezmasterelite · Apr 23, 2011

You can build a window box to use.

Frame with 2"x4" 's around the molding of your window.
Fix the window open about an inch or so at the top if exhaust or bottom if intake.
Cover the wood frame with 1/4" plywood.
Remove from wall,
line the inside with insulation,
add whatever size ducting you use to the plywood.

The boxes require only 2 or 3 screws to hold up, and the holes will be right on the outside of the window frame. It is pretty easy to puddy up and never see again. The boxes minimize heat and sound that will go through the windows. If you leave the blinds shut behind the boxes, from the outside it looks like a person is using the room and never opens there blinds. It is almost impossible to notice the window open at all.

You may need to add a cloth filter on the duct so that light does not escape from your window box. A light filter is better than bending the ducting. Any bends greatly reduce the airflow and a simple 2 or three layer foam air filter will do the same to reduce light coming from the duct.

I hope this is helpful.

Peace

FunkBomb · Apr 23, 2011

During the summer months window AC's do the trick. During the colder months, keeping a window cracked helps with heat and humidity. This is a 4x4 600w tent in a 12x15 foot room.

-Funk

RobMarley420 · Apr 23, 2011

FreedomFightr said:
I also an considering venting my AC exhaust into the attic. I hate venting out the window. Not very low key if you know what I mean.
RobMarley this is what I built to vent my tent.

Can you explain that picture a little bit better? Is that basicallly the same thing pezmaster elite was describing?

Behind the plywood is your open window with the blinds closed? So all you see from the outside is your closed blinds?

FreedomFightr · Apr 23, 2011

Hmmm. maybe I should of lined my set up with insulation. Its gets pretty loud when the AC is exhausting out the window. You get that swooooooooooooooooosh sound!

FreedomFightr · Apr 23, 2011

Yes Sir RobMarley. My set is exactly that. But I screwed the plywood straight to the wall. I should of built a box with 2x4's to bring the sheet of plywood back away from the window a lil bit. might help with the Swoooooooooooooshing I'm experiencing.

FreedomFightr · Apr 23, 2011

But yes, bottom left vent is fresh intake plugged into a CAP Temp Controller. Top left is my scrubber and lights. Top right is exhaust for my portable AC and bottom right is fresh intake for portable AC.

RobMarley420 · Apr 23, 2011

FunkBomb said:
During the summer months window AC's do the trick. During the colder months, keeping a window cracked helps with heat and humidity.

Right now I am keeping a window open to keep the temps down.

I'm using a 3'X3'X6' tent with a 600watt light. It is currently 58F outside and with 1 window open it is 81.5F inside my tent. The 58F air comming through the window is basicly free air conditioning for the room.

But if gets much hotter outside leaving the windows open won't cool it down enough. And my landlord pays my electricity bill so running an additional AC isn't really an option. Allthough during the hottest summer days I'm sure I will need an AC even with my tent vented out the window.

(I wish it was possible to quote multiple posts in 1 reply so I wouldn't have to make 3 seperate posts to reply to everyone.)

RobMarley420 · Apr 23, 2011

FreedomFightr said:
But yes, bottom left vent is fresh intake plugged into a CAP Temp Controller. Top left is my scrubber and lights. Top right is exhaust for my portable AC and bottom right is fresh intake for portable AC.

All going out the same window? How is that possible?
Wouldn't your intake fans just be sucking up the hot air exhausted from the AC and lights?

And also that does all that air flow blow your blinds back and forth?

FreedomFightr · Apr 23, 2011

yes all out the same window. I exhaust out the top in hopes that the hot exhaust air will rise outside and blow away. Seems to work. I have the bamboo style blinds so they dont move around to much. yes you can hear the swooshing from outside. If you have alot of traffic outside your window you might want to reconsider.

crack-attack · May 3, 2011

i routed mine under the house, i removed my vent register in the room, blocked off the sheet metal duct work below, and mounted a 4in pvc t, and a 4in elbow. use it for 2 exhausts and one intake. i use the air from under my house to cool my light. keeps it nice and cool.

Best way to vent grow tent outside the room its in???

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