Grow cabinet design help

[extremophile420]

I am designing a 2x4 wooden grow cabinet, it will be powered by two HLG QB96, and i want to be sure to design it right and create the best grow environment. I am having a hard time deciding on ventilation holes placement, i have two designs in mind and i want to know which is the most effective design, taking into consideration maximum stealth. The cabinet will be placed in a room with a window in front of it, but the back of the cabinet will be a few inches away from a wall. This will bring my ventilation questions.

Design 1

in this design two 4 inch intake holes will be placed on the bottom of the cabinet, and a 4 inch exhaust hole is placesdon the top roof of the cabinet, i am leaning towards this design the most, since its the stealthiest, with some decorations on top of the cabinet and nothing will show.

Design 2

In this design the intake holes are places on the bottom back of the cabinet, and the exhaust of the top back. I see this design is the most common, but i am concerned for two reasons, first is that the back of the cabinet is a few inches away from a wall, and i am not sure if that would harm im passive air intake. And the second reason is that i am afraid that the intake holes will suck back the exhaust air because i will be exhausting in the same direction. (impossible for me to exhaust anywhere but in the same room)

I want to put the carbon filter and fam horizontally in the middle so i can gain more headroom for the lights, thats why the exhaust holes are in the middle of the cabinet.

If there is better designs than the ones i came up with please share with me. I want to grow the best weed.

 

[ReikoX]

I've used design 1 a few times, it's one of my preferred methods. Design 2 will also work if you have a fan blowing over the intakes to mix the air.

 

[extremophile420]

I've used design 1 a few times, it's one of my preferred methods. Design 2 will also work if you have a fan blowing over the intakes to mix the air.

Im leaning more towards design 1 since its the stealthiest. I will be relying on passive intake, the holes will be on the floor, and the cabinet will be raised 4 inches up the floor. Would this offer optimal conditions?

 

[ReikoX]

Yes, that shouldn't be a problem at all. It's what I did with my workbench.

 

[extremophile420]

Yes, that shouldn't be a problem at all. It's what I did with my workbench.

That way you wont be able to see the intake holes unless you bend down and look underneath the cabinet, and the exhaust will be coming out of the ceiling with some decorations covering it. Do you think i will be able to fit a carbon filter and a fan in 2 feet depth? Thats what im planning to do, that way i can lift my qb96 right next to the carbon filter and fan in orser to gain more headroom.

 

[ReikoX]

That way you wont be able to see the intake holes unless you bend down and look underneath the cabinet, and the exhaust will be coming out of the ceiling with some decorations covering it. Do you think i will be able to fit a carbon filter and a fan in 2 feet depth? Thats what im planning to do, that way i can lift my qb96 right next to the carbon filter and fan in orser to gain more headroom.

It may be a tight fit to get a fan and filter in 2 feet depth, but I bet you can do it with some flex duct.

 

[troutman]

I made a nice grow cabinet a while back using 2 X 3 inch lumber and stapled black/white plastic to it.

 

[extremophile420]

I made a nice grow cabinet a while back using 2 X 3 inch lumber and stapled black/white plastic to it.

Mine will be 2x4 one a 2x2 frame covered with half inch plywood painted flat white. Gonna be nice and clean.
Where did you have your exhaust and intakes?

Looks at this one man

 

[troutman]

Intake at bottom and exhaust near the top on opposite side to create a cross draft.

That's a nice cabinet for clones or small plants.

 

[extremophile420]

It may be a tight fit to get a fan and filter in 2 feet depth, but I bet you can do it with some flex duct.

Intake at bottom and exhaust near the top on opposite side to create a cross draft.

That's a nice cabinet for clones or small plants.

My plan was two 4 inch holes, one on the left and one on the right of the cabinet, and the exhaust in the middle top. Is that less beneficial of having them on completely opposite sides?

 

[extremophile420]

It may be a tight fit to get a fan and filter in 2 feet depth, but I bet you can do it with some flex duct.

Total height of the cabinet is 6.10 feet, i can do it with the lights under tue filter and fan, but wouldnt hurt to gain a pit more headroom.

 

[troutman]

Opposite sides will create a better air flow I think. But it will work either way.

 

[ReikoX]

A couple of my builds have been documented here.

Workbench:
https://www.icmag.com/ic/showthread.php?t=326167

Filing cabinet:
https://www.icmag.com/ic/showthread.php?t=317721

Storage cabinet
https://www.icmag.com/ic/showthread.php?threadid=309031

 

[extremophile420]

A couple of my builds have been documented here.

Workbench:
https://www.icmag.com/ic/showthread.php?t=326167

Filing cabinet:
https://www.icmag.com/ic/showthread.php?t=317721

Storage cabinet
https://www.icmag.com/ic/showthread.php?threadid=309031

Your 2020 build is the greatest.
What do you think about cross draft that troutman talked about? Do you think i should modify my designs?

 

[ReikoX]

Like trotman said, either way will work.