Mister, fogger, or other solution to raise humidity in 18 x 18 x 24" Terrarium?

[Ray]

With that setup, you’re fighting yourself, as any extra humidity will be removed pretty quickly with the action of the fan.

The interior volume is maybe 4 cubic feet, assuming the plants and “furniture” take up some of the volume. If your fan is moving more than about 4-5 cfm, it’s probably too much. In fact, with an open top, you may not need it at all. The idea behind air movement is to prevent pockets of stagnant air, or to cause a breeze. Maybe set the fan to draw less air out of the top, which will slow the flow of air in, displacing less of the humidity?

Personally, I’d use a small ultrasonic fogger in that enclosure.

[subtle_variegation]

I see what you mean about the fan, I bought it kind of prematurely because I'm planning on eventually switching the mesh top to glass or plexiglass to keep in more humidity. The fan is pretty low power though and the room that the enclosure is in doesn't always have the main fan on. I'm also paranoid about rot because these orchids are used to a dryer environment (which has not been good for them hence the new setup).

You mean something like this, right? That could work, the only thing I don't like is having to use a smaller reservoir that would probably need refilling often.

Another option that I saw on YouTube is attaching a funnel to an ultrasonic humidifier and running connected tubing into the enclosure. This would be good since I can use a larger reservoir.

The seller on FB is willing to come down to $60 for the kit and a timer. So, that would come out to be a similar cost to the humidifier setup. Would that be a better option?