Like the outside, the north wall inside supports all manner of systems, in addition to having shelves of plants next to it.

On the west end of the greenhouse north wall is the swampcooler vent. Above that is a special cooler - humidifier which further humidifies and cools the greenhouse air. Presently, the cooler - humidifier maintains greenhouse humidity within a 55 - 70% range. Cooling during the evening causes humidity to approach 95%.

Moving east, just past the cooler - humidifier is the Dosatron fertilizer injector which supplies fertilized water to a watering wand as well as the overhead sprayers. East of the Dosatron, on the wall is the snakelike black ABS pipe structure of the water solar heater which supplies warmed RO water to the greenhouse.

In front of the water heater is a three tiered shelf rack with the paphiopedilum shelf in the middle. Average light on this shelf varies from about 400 ftcd on the north side to about 1000 ftcd on the south side of the shelf. East of the shelf rack is the potting bench / workarea. Everything is quite compact!