Often called split systems, wall surface placed ac unit include two almosts all; a compressor situated outside the home and an air electrical outlet unit, noticeable inside the home. http://Www.tdmegalit.ru/bitrix/redirect.php?event1=catalog_out&event2=/upload/iblock/d32/m150xn07+v.2-ps-2005.03.28.pdf&event3=m150xn07+v.2-ps-2005.03.28.pdf&goto=https://www.webwiki.it/palmersgreenhvac.co.uk/air-conditioning-repair.html