AC, the acronym for Air Conditioning, also known as:

• The blowing thingy
• The woosher
• The air freshener (my favorite)
• The air blower
• The cold air blower
• The ceiling square thing
  

The AC has been around for ages now, I can't seem to fathom how people struggle to find the words for it... I understand that it "could" be mistaken for an air blower but the air freshener? The woosher?