Not sure about heat pumps, but in the UK at least there are a couple of companies that specialise in residential water cooled AC, e.g [0]. They use the cold water intake to cool down the compressor which sits inside the property
From a marketing perspective it’s not (as far as I’ve seen) driven by eco credentials, but by not needing planning permission - external AC compressors are not automatically permitted in the UK.
From a marketing perspective it’s not (as far as I’ve seen) driven by eco credentials, but by not needing planning permission - external AC compressors are not automatically permitted in the UK.
[0] https://www.urbancooling.com/water-cooled-air-conditioning