air con

Hi whats the best way to drill a hole for air condition pipes ~50mm wide through clay cladding and what would needed to cover the hole to prevent rain water coming in ? Image of wall below, Thanks In advance! M

Does anyone know of a domestic twin hose portable aircon unit that is available in the UK. I have only found twin hose units for the north american market. By twin hose; I mean one house for external intake and one for external outtake, thus not causing a negative pressure potential in the room...