These are made as hydroponic units but I believe they can be used with dirt quite easily. In these days of chemtrail residue poisoning & killing our soil and gardens it is good to be able to grow organically in a safe sealed environment or for starting your outdoor seeds for the greenhouse or simply a safe organic herb garden. I have had these for a few years but I have never used them. New at that time they were $4000 each after tax and I paid $2500 each, so, a bargain at this price any way you want to look at it at $1000 each. They have been stored in a basement all this time. When I bought them one had been used once and the other 3 times. They are complete with all accessories and Co2 tank. The photo is from the website and is a tiny bit different but essentially the same thing.
See link for details;
https://www.bcnorthernlights.com/products/producer