I am building out my shop in my basement. I unfortunately have to share space with 2 gas water heaters. I would like to enclosed them/put them behind a wall but am unsure how to go about it. My thoughts right now are to use 5/8" fire rated drywall perhaps with a vent of some kind in the wall. I'm also thinking of making the wall hinged like a big door so the water heaters are accessible for service.
I suppose I could also move the water heaters - it wouldn't be that big of a job, but an unpleasant one.