How to - DIY Grow Box with built in carbon filter

Discussion in 'Do It Yourself' started by Biotecology, Nov 26, 2011.

  1. This is the design for my DIY grow tent.
    This tent cost me 107.78 (including the shit I didn't use) and I bought all my supplies at ACE Hardware.
    This post is a WIP and I will be adding pictures soon.

    The benefit of building a tent over buying one is that you can create it exactly how you want it.
    Instructions are confusing and vague in some parts. I wrote them fast so please bear with me. Don't be afraid to post any questions. :smoke:
    The reason that I constructed this tent was because of the shape of my closet. The room is A-symmetrical and there is no premade grow tent that would fit well.
    This tent is not for use with high wattage lights that require air-cooled hoods.
    Construction requires power tools. Specifically, you will need a drill and drill bit.
    My measurements are not included but can be provided. Adding your own measurements is highly recommended so you can cater the box to your own situations.


    An easy way and cheap way to build a grow tent is to use PVC Pipe. You can make a very sturdy box out of it. I suggest using a minimum size of 1" 3/4" PVC pipe. Thicker PVC is better and will provide more support. These instructions assume that 1.75" PVC is being used.


    8 Y couplings are needed, one for each corner of the box.
    4 T couplings are needed to create a X bar in the roof.
    1 X coupling which extends out in five directions. Four couplings together to make a cross, and one more which extends outward from it. This coupling extends in x, y, and z on a coordinate plane.

    There are 20 pieces of PVC tubing required to make the box.

    4 pieces for the height, or legs.
    2 pieces for the width of base.
    2 pieces for the length of base.
    4 pieces half the width of the base -1" for the roof. 2 pieces are connected together with a T coupling to create new bar that is equal to the width of the base.
    4 pieces half the length of the base -1" for the roof. 2 pieces are connected together with a T coupling to create a new bar that is equal to the length of the base.
    2 pieces cut to the width of the base -.75". These are going to become the crossbar
    2 pieces cut to the length of the base -.75". These are going to become the crossbar

    You will need Mylar to incase the box.

    Mylar, or some other reflective material is needed to incase in the box. The amount of mylar you need is equal to the surface area of the box.

    To find the surface area of a box, the formula is...
    l=length w=width h=height

    You will need epoxy to create an airtight seal between the mylar and the pvc pipe.

    4 computer fans that can be mounted within a diameter of 1.25" or less. These are tough to find. My Ace Hardware carries them, however.

    A Drill and Drillbit equal to the diameter of the computer fan.

    5 Zippers -
    4 Zippers which are half the length of the box.
    1 Zipper which is half the height.

    1 Gal container of aquarium carbon and a bag of cotton balls.

    :::Written Instructions:::

    ::Start with constructing the built-in carbon filter::

    Since PVC is hollow (duh), you can create a carbon filter inside of it. To create your vent, find 4 small computer fans which have a diameter of 1.25" or less.

    Before you go about building the PVC box, you'll need to take the X bar for the roof and modify it. First, instead of a standard X coupling for the center, you'll need an X coupling that connects all four pieces of PVC and also has the coupling to connect a fifth piece of PVC into the top. Essentially, you need a coupling that goes X, Y, and Z. (Standard X couplings only go x,y). The "Z" (or the height) where the 5th hole protrudes out of the X should be facing away from the inside of the box. This is where air is going to be pumped out of!

    Once you have your X bar assembled with the right X coupling, then you'll need to fill all the PVC up with carbon. I used a 1gal container of aquarium carbon. Stuff each of the 5 open ends of PVC with cotton. Make sure you do not pack the cotton down as to impede the airflow.

    Don't get too crazy with the carbon. Remember, this is your roof. If it feels too heavy, it probably is.

    On the inside legs of the PVC box, you'll need to make marks where you want to drill your holes. Use a sharpie to mark about halfway up on each leg of the box.

    Use a drill to cut a hole on the mark that is equal to the diameter of the fan you plan to use.

    Mount your fans and seal with epoxy.

    Seal the gaps of the couplings with epoxy.

    You're now ready to build the box.

    ::pVC Box::
    Assembly is pretty damn easy. It's all about making sure that the legs are assembled with other legs, and so forth. Make sure to build from the ground up. Installing the crossbar is easier with two people. There may be a better way than installing it last, but I couldn't think of one.

    Do not use PVC pipe glue to assemble the box in your desired grow space if the finished product isn't going to fit through the door. Use something like E-6000 which has a strong hold, but can still be broken by twisting the PVC in the joint.

    ::Making the door:::

    To make a door on one side, you will need 5 sets of Zippers.
    I like doors with flaps that open outward, like a real tent. Cut one wall of mylar down the center and attach one zipper with epoxy to each side of the cut. Add a zipper to the top and the bottom of each half-cut. One half the of the zipper goes on the PVC, the other along the mylar. This uses all 5 zippers. Glue the side of mylar without the zipper onto the PVC (where the hinges would go.) If done correctly, you should be able to unzip all the zippers and and fold the flaps out to the sides on your tent.

    ::Finishing up::

    Use epoxy to add another 5 walls of mylar to the three sides, floor, and roof of the box. Inspect for areas which could "leak" airflow and seal.

    I will update with pictures when I have free time. Enjoy.
  2. Nice write up! Waiting on pics.:)
  3. i would also like to see pics on this very interesting

Share This Page