I'm looking for a portable water-powered spot cooler for domestic (non-industrial) use. The target application is common apartments where traditional air conditioning is not viable, for example because the apartment is rented or a special license is required to mount the external condenser unit. You can find an example of a similar device hereAn evaporative cooler is not what I'm looking for. The device needs to use running water expel excess heat.

The numbers I entered regarding pricing, order size and shipping are all very rough since such devices currently do not exist where I live, but since traditional portable air conditioners cost from 300-1100 EUR, this is the final consumer price the product has to reach. In terms of requirements, I think you can expect them: Not too heavy, not too loud, installable by 1 or 2 people.