I have been working on putting some information in the tags. I see there are tags for both AC and for Air Conditioning. Can we merge these as tag synonyms? Probably under the AC moniker, but whichever works.
Done! The Master Tag is ac and air-conditioning is the synonym. I would have preferred it the opposite way because AC can also mean Alternating Current, but that tag wouldn't get much use here so I don't have a problem with it as it is.