There’s a niche type of CPU cooler you can get that uses just thermal mass, e.g. thermal pipes from your CPU spreader to finned metal on your case or directly into your case. They can’t provide as much cooling as liquid but it has zero moving parts.

I tried to get one of these cases/coolers for my home server and just could NOT find reasonably priced options or much availability. It’s kind of absurd, there should be a larger market for them.

I didn’t want to have to worry about dust build up and fans dying myself.