Ukungaphumeleli kweyunithi yangaphandle ye-air conditioner-proof-proof ukuqhaqha iqhwa kunokubalelwa kwizinto ezininzi.: isivamvo sokunyibilikisa sangaphandle esingasebenzi kakuhle, i-jam yangaphakathi kwindlela emine yokubuyisela umva, okanye iqondo lobushushu alikafikeleli kumda ofunekayo wokuqhaqha.