Essentially the air conditioning system is a modern styled wall mounted unit that has no outside condensing unit. There are no vent hoses and no interconnecting pipework. The air handler only requires two 155mm holes through the outside wall, and the system fits over the holes and comes complete with folding vents. These vents fit through the holes to give a very neat aesthetic outside appearance showing just two small grilles. All installation can be carried out from within the room. There is no other outside evidence of air conditioning.