This is my set up for growing cool and intermediate miniatures. The box is made of wood and insulation foam board. Other supplies include a dryer vent tube and attachments, a fountain pump, a desk fan, and wet pad. Dimensions of the grow box are 3' long, 18"' wide, 2' tall. I put this together in less than a weekend. (note that i'm not the best carpenter, but the box is adequate!) Cooling: it has a homemade evaporative cooler that supplies cool humid air. The temps range from 60-70 in winter, and about 70-77 degrees in summer. The relative humidity is usually above 70%. Misting: there is a misting pump with 2 nozzles. I use a digital timer to automatically turn on the pump/misters. Only RO pure water is used. The floor of the unit is covered in plastic to protect the wood bottom. Lights: There are 3 23 watt cfl's that seem to provide enough light. the walls are white so they reflect nicely. I've had varying success so far. The truly cool growers like Masdevallias have suffered a bit as i'm not able to keep it cool enough in the Summer, especially at night. The intermediates grow fine. Some of the other learnings are: 1) Be on the look out for pests as they multiply rapidly in this closed environment. I had to battle soft brown scale, mealybugs, and bush snails. 2) Be sure to the keep reservoirs filled with water. A couple of times, the evap cooler went dry, which means warm dry air was being pumped in! 3) Adjust misting times depending on season. Warm and dry times mean more mistings. 4) Check the individual pots often to see if watering is needed. All the pots in this unit are in NZ moss. Here are a few pictures: The entire unit: The cooling unit: The dryer tubing detail: And a peek inside: Here is a link to more photos: http://www.flickr.com/photos/minicatt/sets/72157613044939305/ I would be happy to answer any questions you might have... Thanks, Peter T.