The college greenhouse I used to run back in the late 80's was a
very similar model; it tended to keep things too wet. However, if you take
a small piece of paper towel, and put it over the stainless steel mesh
(and adjust the counterbalance on the other end of the leaf), it absorbs
more water and takes longer to dry out. It still keeps the humidity up
while not soaking everything.

For orchid use, you'd have to put a timer interlock on there so it
didn't go off at night, as someone else noted.

-AJHicks
Chandler, AZ