Screenshot: New Box - Need Opinions!

Gravity Man · Dec 10, 2013

Spanky's Monkey said:
You can always build to separate tents and use a "y" duct adapter and ducting to vent to the fan then the filter. That will also eleminate the need for extra work blocking light contamination. Plus then you have the option of building the specific tents to yor needs. Perpetual grow, mother/cone, veg, flower, and the possiblities are endless.

That's essentially what I have up top, two chambers with duct adapter. I was actually looking for a "y" duct adapter in the 3D Warehouse, but a "T" was all I could find, and I'm not good enough at SketchUp to make my own! Lol. But, you're right, the "y" adapter would serve as a minor light trap.

The building will commence this weekend, so I'll have something concrete by then.

Thanks for all the constructive criticism. It will no doubt help me make this tent really nice.

kushdaddy1980 · Dec 10, 2013

i like the idea of the pvc plastic, and i also like the 2nd idea with the tubes.. i use those for light deflection, i spray the inside of the tube with black spray paint right at the bend and i have minimal light leaks from room to room.

but i have 2 questions.1, on the #2 idea how will you get the rooms to seal up tight enough to create the vacuum without leaks and still have the components accessible? i used to use velcro to seal off the pvc door to my small grow room but those chambers look to me like they would be hard to get sealed up just right, maybe the first light trap idea would be better?

and 2...are you trying to be stealthy about this grow? does it matter if people see it? if so you might think of ways to make it smaller or out of the way where it wont be discovered.

Gravity Man · Dec 10, 2013

Abiqua said:
Use the filter you have, I wasn't suggesting buying another one. I highly recommend reading the link, way more info than can be explained. Virtually the same example of your last design is being used.
Lots of graphs and charts that will answer your questions. [I wasn't suggesting looking for a filter under 200 cfm, I was just pointing out that the lowest CFM of factory made filters is generally around 200 cfm... I should have said, "dare you to find" because you won't, I was more following up on Spanky's response......]

I don't think you need to replace anything, but you won't know till you start running it and realize how your ambient temp and humidity are acting INSIDE the cab. Ton's of factors will affect this beyond the fan. How much will each plant evapostranspirate for instance, how will it affect humidity and how will it affect co2, none of these factors are directly related but can be indirectly related.

If the filter and the fan are sized correctly for your cab, then it won't affect temp/Rh that much, water, plants, inside variables will alter this more[incremental changes of a few degrees] than the fan combo.

Most people in micro start using fans, then don't realize how much they flow or start flowering and THEN add a filter on and heat rises. I think that is what Spanky is referring to.

Now go out and see if it works. Planning it on paper is one thing, but testing is another....

I'm actually in the process of reading it now. Great info! I'll be sure to save it, and I'll probably print it out and put it in a binder. I've been saving snippets here and there.

I get what you're saying about the filter, yeah 200 was the smallest I could find.

You're right. This is a little bit of trial and error. Worse case scenario, I'll build two tents and use my one fan/filter for both. If that doesn't work out, I'll buy another combo.

Once built, I'll take measurements using my thermometer and hygrometer, and that will give me the answers I need.

Thank you for your input as well. It has been very helpful!

Gravity Man · Dec 10, 2013

kushdaddy1980 said:
i like the idea of the pvc plastic, and i also like the 2nd idea with the tubes.. i use those for light deflection, i spray the inside of the tube with black spray paint right at the bend and i have minimal light leaks from room to room.

but i have 2 questions.1, on the #2 idea how will you get the rooms to seal up tight enough to create the vacuum without leaks and still have the components accessible? i used to use velcro to seal off the pvc door to my small grow room but those chambers look to me like they would be hard to get sealed up just right, maybe the first light trap idea would be better?

and 2...are you trying to be stealthy about this grow? does it matter if people see it? if so you might think of ways to make it smaller or out of the way where it wont be discovered.

If I need to use those tubes I'll definitely spray the insides black.

As for sealing the rooms up, yeah, the first idea would provide a better light trap, but if I use those 90 degree PVC bends and paint them black, that should do it. Also, instead of using a "T" duct adapter, I'd use a "Y" adapter, giving me some more lightproofing. I like the first chamber, but like others have said, it's not as efficient, although I like it's simplicity a lot.

I'll be using panda film and duct tape for the main structure. After that, I'll be screwing in some 1/8" luan (thin wood) to the inside of the doorway. After that, I'll construct a door out of PVC that fits just inside the door opening. On the wood I screwed to the inside, I'll put some weather stripping, and when I close the door, it will rest against the weather stripping. I'll construct some kind of latch system to keep the door closed, and I'll make a PVC hinge for the other side. This should make the entire thing airtight, except for the intake vents, of course. I'll be sure to post up some pictures after it's finished.

No, I'm not going for extreme stealth. This structure will be locked in my laboratory (my unfinished basement). The only thing I require is no smell, and I think I'll achieve that. It will be right out in the open inside a room that only I have the key to!

Screenshot: New Box - Need Opinions!

Gravity Man

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kushdaddy1980

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Gravity Man

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