Many years ago I did an old home that had running water from a spring.
It went through a big old car rad and then back out side to the ditch.
This I guess was the first air conditioner.
The had a big fan pushing air through the fan.
Could this have been the same?
Servel (and others) used to make a gas-fired air conditioner that was actually a chiller. It sat outside and using absorption refrigeration, produced cold water. The cold water was pumped indoors to a fan-coil unit, which could then circulate cool air throughout the structure.