Exhaust/ducting question

Weouthere · Apr 25, 2020

I got a question about the ducting on my new tent. Can’t seem to find an answer, plus it’s late and my tent gets here tomorrow.

So I’m gonna run filter>fan>ducting (into room)
And passive intake with just 6” ducting. Gonna curve the ducting 90 degrees to stop light.
Do I need to run the exhaust air out the window? Or will having the door/window for the room open take care of stale air build up? Pic is what I have set up so far
There’s a ceiling fan and it’s still cool here. Plus the kitchen is being redone so the house is cool anyway

PoopyMcPooper · Apr 25, 2020

Your airflow is 100% backwards. The filter goes in the tent, ducted through your light if air cooled and exhausted outside.

Passive intake from the air in your place.

Scope this out when you have a chance

The Ultimate Vapor Pressure Deficit (VPD) Guide

"Why devote an entire guide to VPD?" you might ask. The answer is that the vapor pressure deficit (VPD) is extremely important for growing plants. VPD helps you identify the correct range of temperature and humidity to aim for in your grow space. With VPD you can achieve the best results while...

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Renfro · Apr 25, 2020

@PoopyMcPooper is correct about how you should set it up.

Carbon filter up high in the tent, connected to the light reflector (if air cooling the light) then the blower pulling air and sending it out of the tent (preferably to the outside). Passive air vents open in the bottom of the tent.

If you don't exhaust the heat outside then you will recirculate, slowly heating the room the tent is in. This can cause you to lose your cool air source unless you are running an AC in the lung room.

Cookie Rider · Apr 25, 2020

It's always best to vent the humidity and heat outside the house.
You don't want possible mold issues.

Renfro · Apr 25, 2020

Cookie Rider said:
It's always best to vent the humidity and heat outside the house.
You don't want possible mold issues.

Indeed, the absolute worst idea is to vent into an attic.

Cookie Rider · Apr 25, 2020

Renfro said:
Indeed, the absolute worst idea is to vent into an attic.

Especially if your a respectful tenant.
Please go through the extra effort to cut a hole and vent it outside.

Renfro · Apr 25, 2020

Cookie Rider said:
Especially if your a respectful tenant.

Or if you own the home. lol Black mold in an attic is very expensive to clean up.

Weouthere · Apr 25, 2020

Okay so I didn’t explain it right I guess. But I have it set up correctly. Carbon filter in the tent with fan blowing out through ducting.
I can’t be cutting holes in the wall lol, I live at home still.
Would ducting out the window be an option?
Running an led thought I said that my bad.

Weouthere · Apr 25, 2020

Weouthere said:
Okay so I didn’t explain it right I guess. But I have it set up correctly. Carbon filter in the tent with fan blowing out through ducting.
I can’t be cutting holes in the wall lol, I live at home still.
Would ducting out the window be an option?
Running an led thought I made that clear

Renfro said:
@PoopyMcPooper is correct about how you should set it up.

Carbon filter up high in the tent, connected to the light reflector (if air cooling the light) then the blower pulling air and sending it out of the tent (preferably to the outside). Passive air vents open in the bottom of the tent.

If you don't exhaust the heat outside then you will recirculate, slowly heating the room the tent is in. This can cause you to lose your cool air source unless you are running an AC in the lung room.

This is what I was looking for! Thanks man

Renfro · Apr 25, 2020

Weouthere said:
Would ducting out the window be an option?

Yep. You can cut a sheet of plywood that fits the window opening and then make a hole in that to install the vent.

Weouthere · Apr 25, 2020

Renfro said:
Yep. You can cut a sheet of plywood that fits the window opening and then make a hole in that to install the vent.

Probably what I’ll have to do! Thanks so much.

Much love and happy growing yall

Weouthere · Apr 25, 2020

PoopyMcPooper said:
Your airflow is 100% backwards. The filter goes in the tent, ducted through your light if air cooled and exhausted outside.

Passive intake from the air in your place.

Scope this out when you have a chance

The Ultimate Vapor Pressure Deficit (VPD) Guide

"Why devote an entire guide to VPD?" you might ask. The answer is that the vapor pressure deficit (VPD) is extremely important for growing plants. VPD helps you identify the correct range of temperature and humidity to aim for in your grow space. With VPD you can achieve the best results while...

pulsegrow.com

I just realized the confusing lol.. I have it standing on the ground for the pic.. it’s gonna be hung in the tent with the ducting going out sorry guys I was falling asleep when I posted this last night

PoopyMcPooper · Apr 25, 2020

I use this type of window adapter and have my duct hooked up to it

Weouthere · Apr 25, 2020

PoopyMcPooper said:
I use this type of window adapter and have my duct hooked up to it

View attachment 4545104

Where’d you get that? I looked all over today and couldn’t find one

Renfro · Apr 25, 2020

Weouthere said:
Where’d you get that? I looked all over today and couldn’t find one

Do a google search for "air conditioner window vent"

Weouthere · Apr 25, 2020

Got it all set up. The lights are just placeholders until my HLG 550 gets here.
The walls are sucking in and the temps are stabilizing a bit now.
I’m so freaking stoked to finally have a “big boy” grow.

Renfro · Apr 25, 2020

Looks good. Did you open any of the passive intake vents down on the bottom?

Weouthere · Apr 25, 2020

Renfro said:
Looks good. Did you open any of the passive intake vents down on the bottom?

Yup, got one with 6” ducting in a u shape running out of it. The bottom of the U is where the sleeve is if that makes sense. I’ll post a pic when I get home

Weouthere · Apr 25, 2020

Weouthere said:
Yup, got one with 6” ducting in a u shape running out of it. The bottom of the U is where the sleeve is if that makes sense. I’ll post a pic when I get home

Here’s the intake hole. Outside first I’m not sure why it uploaded that way.
I’m gonna let it run overnight before changing anything else. I think the humidity is a little low, around 35-40%. I’ll deal with it tomorrow. Any suggestions? I might get a humidifier when the new light gets here as well

metic · Apr 27, 2020

Mate how you've got it is fine for passive intake, maybe even one more open duct port with ducting will be better once things get bigger and need more oxygen, since your intake should really be 2x larger then the outtake for good measures, also if you want to move the filter and fan outside the tent that will still work filter>fan>duct>tent, will save some space in the tent and you'll be sure that no smell escapes through holes in ducting/fan casing. ( Of course with this scenario you will be pushing air into the filter as opposed to sucking air out of it ) but I've seen no difference when using this method

Exhaust/ducting question

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