Water cooled air conditioners are installed internally with no outside condenser, therefore do not need planning permission.
Is A Water Cooled Air Conditioner A Good Choice? - Air Boca
Energyland - Water-cooled Air-Conditioning System
Air Conditioner Air Cooler Fan Water Cooling Fan Air Conditioning
Air Cooled Chiller VS Water Cooled Chiller
Which is a better air conditioning system VRV or chiller for a 100
The difference between our Portable Air Conditoner and a Air
Water Cooling vs Air Cooling Power Consumption
The Differences Between Evaporative Air Coolers & Air Conditioners
No Outside Box Air Conditioning
Water Cooler vs Air Conditioner - Which is the Best Cooling Method?
Air Conditioning Systems Configurations – Part Three ~ Electrical