Replying to both of you.  The reason it can't be had in a single is because it is designed to run in the Antspace environment.  A single unit does not come with a radiator and all of the components and you can't just throw a little 360mm radiator and bs pump to cool the thing.  It is a 5200W miner which means you have to be able to dissipate 5200W of power.  Power = heat, and think of it this way a full watercooled PC using the highest TDP CPU and GPU setup is still under 700W (and I'm being nice on that) that still runs "warm", imagine it trying to keep up with something that requires a bare minimum of 7 times the amount of power.