“Underground” projector enclosures is typically a tunnel or cave system where projection is required and a protective housing is an absolute must have.
As with all underground environments heat is never an issue as they tend to have the same temperature all year round but dust and humidity can be.
With the correct filters and an climate system developed to manage and control the air flow around your projector then even in such environments for projector will thrive.
Often challenges will arise to even the most able engineers, such a lack of straight lines and getting power to the location.
As well as protection for the projectors, when they run at correct operating temperature, the lifetime of the hardware will out perform expectations, and result in less maintenance. Even the bulb life in the projector should give many more hours of service.
See the finished DREAM HUNTERS show in the video below.