One can buy large building air conditioners that use water to move heat around. There will still be refrigerant somewhere in the system, but there won’t be long

One can buy large building air conditioners that use water to move heat around. There will still be refrigerant somewhere in the system, but there won’t be long refrigerant pipes anywhere. I don’t know how popular these are. I have seen multiple condo buildings with a water source heat pump in each unit. The usual suspects (Mitsubishi, Daikin, etc) have hydronic systems with outdoor heat pumps on their websites. Chiltrix markets a small-building solution.