Thanks mr. ganga,
The reason i want to build a grow box in the utility closet is so the younger members of my family wont see a plant in teir hiding place. I simply was wondering what size box would be most efficient for the one water farm planter. i want to include space for lights, venting. etc. the smaller the better.
There is also a hot water heater and central air unit in the closet i thought might affect the plant if the water farm was not inclosed.

I am going to buid a grow box 4l x 3w x 4h if you agree.

T.I A.