Would you rate my set up please?

I've designed and built a sizeable stealth box that poses as a basement tools cabinet. I made the exterior out of 3/4 thick birch plywood using 2x2s to create a frame.

The exterior dimensions of the completed box are 72 inches tall by 24 inches deep and 48 inches long. The tops and bottoms are spray foamed with firegrade spray foam insulation, the sides are just normal foam insulation but hear me out . The wood frame is all glued/duct taped /sealed to be pretty dam light and air tight.

The interior world of the box is made out of fire grade sheet rock. The sheet rock is more or less puzzled in and using some drywall compound and duct tape and minimal drywall screws (to make a revision easy). Basically I created a sealed interior that fits inside the otherwise insulated box with a rudimentary door. (That seals behind insulated doors of the wooden cabinet itself.

I have installed a couple studs on the wooden box ceiling itself and suspended hooks and made holes down through the dry wall ceiling to hang my lights. I've chosen what I feel is a good quality LED light system agroLED® Dio-Watt® 288, 175W Full Spectrum Low Pro.

For airflow I have carved out a passive intake hole on the bottom and a exit hole in the upper part the back side of the cabinet. For my fan system I picked the Hyper Fan Digital Mixed Flow Fan - 6 Inch | 315 CFM which will pass through an carbon filter then out the back near the top a piece of ducting.

For power I have created a separate hole in the side of my box for a decent GFI power strip which will plug directly into a standard wall outlet.

The interior itself is simply painted eggshell white.

Inside the box, placed above the LED system I intend to install a AFO Fire Ball, ABC Fire Extinguisher, Fire Suppression Device.

My question to experienced members is --- how'd i do?

ty

Sounds good.

That's a mighty powerful fan for a small space, is it speed controlled? Have you fired her up and checked your intake is big enough to allow it to run without making some howling or other noise?

What are the interior dimensions?

How big is the areas your cabinet is in? Does the duct extend to outside or vent into garage or whatever building its in?

Do you have pics?

Sorry no pics yet..... the interior is a little over an inch smaller than the exterior box. I chose to leave gaps between inside world and the outside box for additional noise cancellation. 70" h x 18" deep x 46" l

The fan I mentioned is indeed variable speed controlled. Help me with my logic but a 6" fan running at a low through put ought to cross performance paths with a 4" fan going that's throttled to %50 and beyond. I picked that particular fan after doing some homework: its got a DC motor designed specifically for the variable speed controller that comes with the product, as quiet as they come i think. I need to move 160 CFM ....max (I didnt subtract the mass of my hardware in the box.) My thought is running this bad boy on its default %30 setting will give the box plenty of lung air and if i need to scrub additonal stink out of the air i can turn up the beast for 10 minutes prior to opening the box. Am I on the right track there?

As for venting ....I have to admit that the air is flowing back into the basement. One of my limitations is i dont have the ability to vent to outside. I was looking at what they call petite dehumidifer that I was considering putting near the box .....also I have an old school dehumidifier unit that is nice and freakin loud.

I intend to grow a max of 4 plants in the space of about 160CFM and I plan on harvesting in the minimum amount of time to sustain my own personal use. So, speaking of ventilation, what is the humidity impact to the basement environment with my set up? I should mentioned I did buy an indoor/out door thermometer and humidity check. Further, the unit I live in does have an air exchange system designed to dehumidify. ( a system that I just serviced the filter on).

Also, as far as power load goes I think that light and fan unit I bought is both energy efficient and relatively low power wattage compared to older and/or more powerful systems. Would anyone be able to confirm that my set up is a low wattage set up?

Any insight into my humidity solution would be greatly appreciated.

signed....The Engineer (wannabe)

Hope your hyper fan is a little less loud than my 6 inch version. At low speed it's ok but any higher and it sounds like a jet engine in a tin can. I don't use it at all in my cab now because of the noise.

When I changed rooms I had passive intake from my basement, it was a fairly dry basement, no damp but still the humidity was a good 10-15% higher. I tried one of those micro dehumidifiers in tent but it didn't touch the sides. But my space was considerably bigger.
I used a fairly big one in the basement to lower the humidity before it went upstairs into my room, that worked. For the space you have and the cost of a micro dehumidifier it would be worth trying one first. They are very quiet.
If its doesn't work then you will have to run a big one, it may be noisy but its a dehumidifier and has genuine reason to be running other than "im growing weed".

I asked about dimensions inside because it looks like you might be a bit under powered lighting wise for the whole space. But that doesn't mean you cant do what your planning with a reduced footprint. Plus if its personal then quality matters more than density of product.

Everything sounds low wattage to me and been so the cab wont heat your outer space too much, you will have to run it and see.
What happens when you don't vent outside is the air gets warmer every time it passes through your grow cab until its to warm, but with a big enough space and a small enough cab it could well find a happy medium temp wise. Again you will have to run it for a few days and monitor temps.
The other thing that happens though is co2 is slowly depleted because fresh air is not been pulled into the whole room that feeds the cab. But been in a basement the co2 levels should be naturally higher anyway and co2 from the house will find its way down there.

Pictures or it didnt happen

Those little dehumidifiers, the pint-sized ones don't do anything, 0, nothing.. save your money