Exhaust to another tent

[tst2015]

Currently I have one tent (4x3) going with 4" carbon exhaust. It's got a negative pressure even with the exhaust fan running at half speed and a small 4" duct fan running full speed for fresh intake. The 4" fresh fan is rated at 100cfm but it doesnt come close. Maybe 1/4 of that.
Anyway, I've got to switch my tent to flower in the next week so I built a closet grow room (2x4ish) for my other plants that are still in VEG The closet is across the room unfortunately but it's what I'm stuck with for now.
Do you think I could exhaust into my flower tent where the carbon filter is...and let it clean all the air?
I was thinking of running flexible ducting over to it and save having to get another carbon filter because the plants that will be going into the VEG tent have a very strong smell already.
(I forgot to mention...I'll be running LED in the closet so hopefully the air I'm exhausting to the flower tent wouldnt be too warm. I would also put one of my stronger fans to intake into that FLOWER tent so it brings in more cool air and keep the pressure from sucking my tent in too much)
Anybody doing anything similar to this idea?

 

[mistermagoo]

Currently I have one tent (4x3) going with 4" carbon exhaust. It's got a negative pressure even with the exhaust fan running at half speed and a small 4" duct fan running full speed for fresh intake. The 4" fresh fan is rated at 100cfm but it doesnt come close. Maybe 1/4 of that.
Anyway, I've got to switch my tent to flower in the next week so I built a closet grow room (2x4ish) for my other plants that are still in VEG The closet is across the room unfortunately but it's what I'm stuck with for now.
Do you think I could exhaust into my flower tent where the carbon filter is...and let it clean all the air?
I was thinking of running flexible ducting over to it and save having to get another carbon filter because the plants that will be going into the VEG tent have a very strong smell already.
(I forgot to mention...I'll be running LED in the closet so hopefully the air I'm exhausting to the flower tent wouldnt be too warm. I would also put one of my stronger fans to intake into that FLOWER tent so it brings in more cool air and keep the pressure from sucking my tent in too much)
Anybody doing anything similar to this idea?

I pretty much do exactly what you are asking and it works fine.

 

[My Name is Mike]

If I'm following you right, I see no problem. You might be need crank up your exhaust fan though to compensate for the additional scrubbing air space. I'd run the ducting as high up and closest to filter so it's scrubbed and filtered out quickly. You don't want that air sitting in your flower tent because LED or not, it's still drawing heated air.

 

[tst2015]

If I'm following you right, I see no problem. You might be need crank up your exhaust fan though to compensate for the additional scrubbing air space. I'd run the ducting as high up and closest to filter so it's scrubbed and filtered out quickly. You don't want that air sitting in your flower tent because LED or not, it's still drawing heated air.

Yeah I'll have to see how I can do it. I have a hole about half ways up the side but I use that to draw outside room air through my hood and out through one of the top holes. My carbon filter vents through the second top hole.
But I've got another hole in the top that I can probably make work. My tent has a propogation section with a removable mylar wall that I took out for now making it one whole section instead of two.

 

[My Name is Mike]

Yeah I'll have to see how I can do it. I have a hole about half ways up the side but I use that to draw outside room air through my hood and out through one of the top holes. My carbon filter vents through the second top hole.
But I've got another hole in the top that I can probably make work. My tent has a propogation section with a removable mylar wall that I took out for now making it one whole section instead of two.

If that mid level hole is only for your hood and exhausted out, I don't see a problem hooking up your duct to that. You don't need fresh air for your hood setup just fresh air for your grow environment.

 

[tst2015]

If that mid level hole is only for your hood and exhausted out, I don't see a problem hooking up your duct to that. You don't need fresh air for your hood setup just fresh air for your grow environment.

I thought about that too...only problem is that it wouldn't get scrubbed before it goes outside if I do that

 

[My Name is Mike]

I thought about that too...only problem is that it wouldn't get scrubbed before it goes outside if I do that

Ah, yes you are right. Do you have enough head room to connect the hood and filter/fan together? Duct from veg to flower tent, through hood, through filter and exhausted out?

 

[tst2015]

Ah, yes you are right. Do you have enough head room to connect the hood and filter/fan together? Duct from veg to flower tent, through hood, through filter and exhausted out?

Initially, I tried to run carbon filter through hood when i was testing my setup. But my tent was getting too warm so I opted to use two separate fans.
I did try running my new closet today with both LEDs running...with no exhaust or intake hooked up...and it got to 91F
So I put a 6" duct fan for intake running at mahbe half speed (rated 240cfm max) and it cooled to 77 just doing that without an exhaust.
So I think this plan to go into another tent might work as far as temps...humidity might be the only other issue