Thank you everybody for nice compliments.
Marilyn, the humidity in the area is around 60%. When the plants are watered and I spray the water inside in the morning, the humidity goes up to 75%. The excess water sit on the grid and evaporates (I think.). The room temp stays around 70 degree during the days and 60 degree during the nights.
As far as the air movement, please see the first picture. The fan is stationed at the other side 24/7.
In order to avoid the direct air, I hang a piece of the show curtain which can be rolled up for the watering.
The room I grow my orchids is a garage.