Dendrobium lindleyi var. aggregatum question

[spetrizio]

evaporative cooler would be perfect for such dry climate.
only problem is probably to find it in Namibia. I could not find the small one in Croatia, so I am using strong ventilation and high presure misting system.
My GH is fully exposed to sun. during the winter without ventilation temp goes over 30C even outside temp is around 0C.

maybe you need better ventilation. you need at least 1 change in 3-5 minutes. I have variable speed vent from 1 change in 10 minutes to 1 in 1 minute.

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